report prepared for 5 Bedroom Victorian House, Widcombe version BEDROOM VICTORIAN HOUSE, WIDCOMBE

Transcription

1 report prepared for 5 Bedroom Victorian House, Widcombe version 1.0

2 INTRODUCTION 2 THE HOUSE BASIC INFORMATION BUILDING TYPE 3 storey terrace AGE 1906 BEDROOMS 5 COMMUNAL ROOMS 3 CLIENT AIMS FOR THE PROPERTY Recommendations will be made with reference to the following client priorities: Recommendations should be focussed on cost effective fuel bill savings Reducing the carbon emissions related to fuel use at the property is a key priority Recommendations that improve the warmth of the property would be welcome, but improving warmth is not a key priority BATHROOMS 4 DESCRIPTION OF LOCALITY Rural ORIENTATION Front of house faces approximately South SURROUNDING LAND Medium sized garden TENURE Owner Occupier SPECIAL PROTECTION In conservation area GENERAL COMMENTS ON CONDITION The house has some areas in need of refurbishment We evaluate a wide range of options and provide you with all the results. Some will be better than others (some may even be detrimental). We aim to give you the information to make informed decisions. To help with this we select those measures that we deem to be most beneficial to your property and situation and group them into suites. Options that are selected are indicated by different leaf symbols depending on the suites in which they are included.

3 CURRENT ENERGY USE 3 Energy Use and CO 2 Emissions Of Your House Using the Parity computer model, the energy cost and CO 2 emissions can be broken down so that we can see where it is used in the house. The model has been seasonally calibrated against gas and electricity bills provided as more or less than a whole year of data was provided. The graphs below are different ways of representing the proportions of fuel costs, energy use, CO 2 emissions and heating burden. [N.B. Throughout the report we refer to energy savings, CO 2 savings, and cost savings separately as electricity is more CO 2 intensive per unit than gas, as well as costing 12-18p per unit where gas costs 3-4.5p.] FUEL COSTS USED IN ANALYSIS ANNUAL FUEL COSTS COAL / WOOD MIX 6.0 pence/kwh FUEL COSTS YOUR HOUSE UK AVERAGE GAS 3.8 pence/kwh ANNUAL 2,301 1,110 ON PEAK ELECTRICITY 13.4 pence/kwh

4 CURRENT ENERGY USE 4 ENERGY WHAT S USING YOUR ENERGY? YOUR HOUSE 27,978 kwh (6,994 per person) N.B The large miscellaneous figure includes the electric underfloor heating UK AVERAGE 18,639 kwh (7,965 per person) Key (large pie charts) (labelled clockwise in numbered order) Key (small pie charts) (labelled clockwise in numbered order) 1 Space Heating 2 Hot Water 1 Windows 3 Cooking 2 Doors 4 Consumer Electronics 3 External Walls 5 Computing 4 Ground Floors 6 Cold Appliances 5 Roof 7 Wet Appliances 6 Draughts 8 Lighting 9 Miscellaneous These charts are different from the previous charts as they compare energy proportions rather than price. We ve also split out the appliances detail. Focusing on heat loss can help identify the different building elements where most energy is being lost.

5 5 Measures Evaluated 1.1 WINDOWS AND DOORS ENERGY PROPORTIONS* 3.1% of energy bills - 70 CO 2 EMISSIONS PROPORTIONS* 3.8% of the CO 2 emissions kg *These are for conduction losses only. Losses due to window and door draughts are included in the next section Draughts COMMENTS AND OBSERVATIONS Most of the windows in the property are double glazed windows with moderate efficiency in good condition. Although minor savings would result from replacing them with more modern units, this saving would be very small indeed compared with the cost of replacement. One of the windows is a single glazed casement windows in good condition. Although it is inefficient, it does not have a large area compared with other elements such as walls or roof, so is probably losing comparatively little energy compared with the cost of replacement. For this reason it is not necessarily cost effective to replace compared with other cheaper and more effective measures possible at the property. The front door is solid wood. The rear kitchen and family room doors are single glazed. DISCUSSION OF OPTIONS Although replacement or refurbishment of windows might allow other benefits beyond energy savings such as avoidance of condensation and improved security, windows are generally expensive to improve, and generate relatively modest benefits. Although replacement or refurbishment of windows might allow other benefits beyond energy savings such as avoidance of condensation and improved security, windows are generally expensive to improve, and generate relatively modest benefits. Secondary glazing offers much of the benefits of double glazing at a cheaper price. If substantial upgrades are being planned to most of the other building fabric elements i.e. the walls, then it will probably be necessary to improve the windows to reduce condensation. In addition, improving the controlled ventilation may also be necessary. The reason being is that upgraded walls will have less water condensing on them (usually in small enough amount to not be noticed) and so the condensing of the water in the air is concentrated on the remaining cold surfaces i.e. The windows. Similar to windows, doors are also expensive relative to the modest gains that can be made by replacing them. Upgrading door windows from single to double glazed and meeting building regulations will improve insulation properties, but there are likely to be more cost-effective improvements in other areas of the house.

6 6 OPTIONS EVALUATED Install secondary glazing to single glazed windows Replace single glazed windows with high specification triple glazed windows Replace single glazed windows with windows that meet building regulations (Professional Measure) Replace 6mm double glazed windows with high specification triple glazed windows Replace 6mm double glazed windows with windows that meet building regulations Replace 12mm double glazed windows with high specification triple glazed windows Replace 12mm double glazed windows with windows that meet building regulations Replace 16mm double glazed windows with high specification triple glazed windows Replace 16mm double glazed windows with windows that meet building regulations Replace front door with a door that meets building regulations Replace rear kitchen and family room doors with doors that meet building regulations The symbols indicate whether they are included in a recommendation suite (see Section 4)

7 7 1.2 DRAUGHTS ENERGY PROPORTIONS 2.4% of energy bills - 56 CO 2 EMISSIONS PROPORTIONS 3% of the CO 2 emissions kg COMMENTS AND OBSERVATIONS In such a relatively old dwelling, the heat lost through draughts is relatively very large. There are a number of draught points in the property that could be addressed: open chimneys, loose doors, unsealed floorboards/skirtings, extractor fans, air brick vents. DISCUSSION OF OPTIONS Doors and windows can be easily draught-proofed by DIY, e.g. using tape or at a higher cost by professionals, e.g. using a rebating system. Very loose doors may need to be built up slightly with wooden strips first to enable a tight fit with the draughtproof system. The wooden floors and spaces under skirtings can be sealed with coloured sealant or wood glue, specialist rubber tube sealant or strips of wood depending on the finish required. Carpeting will seal them to some degree but it is best to seal them properly before laying the underlay. Chimneys are designed to effectively move air from inside a building and put it outside. They can either be permanently blocked off or more easily sealed using removable chimney balloons. Self-ventilation or extractor fans could be replaced by mechanical heat recovery ventilation. Heat recovery ventilation units can retain more than 85% of the heat for recirculation. OPTIONS EVALUATED Seal floors and skirtings of all floors (DIY) Seal floors and skirtings of all floors Replace louvred fan with heat recovery fan Replace passive vent with heat recovery fan Replace passive vent with humidistat controlled vent Block passive vent (DIY) Block passive vent Stop using chimney and block with removable chimney balloon (DIY) Keep adjustable passive vent always closed (DIY) Draughtproof all external doors with weatherstrip (DIY) Draughtproof all external doors with a rebated brush system The symbols indicate whether they are included in a recommendation suite (see Section 4)

8 8 1.3 ROOF COMMENTS AND OBSERVATIONS The main loft currently has about 75mm of mineral wool insulation. There are two flat roofs and three pitched roofs. DISCUSSION OF OPTIONS There is already some insulation and we have modelled topping this up to 300mm. Loft insulation involves installation of 300mm (12 ) mineral wool insulation placed both between and above the joists. As boarding is not usually installed, the loft cannot be used for storage afterwards. OPTIONS EVALUATED Top up loft insulation to 300mm (12") by adding an extra 225mm (9") mineral wool insulation between and over joists Add 25mm PIR insulation internally to the flat balcony roof Add 25mm PIR insulation internally to the flat dormer roof Add 25mm PIR insulation internally to all pitched roofs Add 50mm PIR insulation internally to the flat balcony roof Add 50mm PIR insulation internally to the flat dormer roof ENERGY PROPORTIONS 3.1%of energy bills - 70 CO 2 EMISSIONS PROPORTIONS 3.7% of the CO 2 emissions 375 kg If storage is required then the joists can be extended, mineral wool added and then boarded out. Alternatively, you can either add additional cross joists with mineral wool in-between and board out on top or use mineral wool between the joists and expanded polystyrene (XPS) boards above with boarding on top to spread the load. 100mm of mineral wool and 100mm XPS above the joists is equivalent to around 300mm of mineral wool. Add 50mm PIR insulation internally to all pitched roofs Add 100mm PIR insulation internally to the flat balcony roof Add 100mm PIR insulation internally to the flat dormer roof Add 100mm PIR insulation internally to all pitched roofs Similar to wall insulation, ceilings can be insulated from the inside and replastered. This may be the preferred option with the flat roofs and pitched roofs. The symbols indicate whether they are included in a recommendation suite (see Section 4)

9 9 1.4 WALLS ENERGY PROPORTIONS 6.1% of energy bills CO 2 EMISSIONS PROPORTIONS 7.5% of the CO 2 emissions 755 kg COMMENTS AND OBSERVATIONS The stone walls of the house are fairly inefficient and will be losing much heat. Different types of stone walls vary in the amount of water vapour they pass through, and in the amount of heat they retain / transmit. For this reason we would always recommend a 'dew point calculation' to ensure that the right insulation method is chosen before installing wall insulation on a stone wall house (see section 5.8). The dormer timber frame side cheek walls and timber loft room walls will also be losing heat and could be improved with added insulation. DISCUSSION OF OPTIONS A variety of internal wall insulation options are available and in varying thicknesses. For any given material the thicker the insulation the greater the heat loss reduction, albeit with diminishing returns for each addition of thickness. As such there is a decision to be made with regards to balancing cost, reduction of room space and reduction of heating bills and CO 2 emissions. Internal insulation can be installed either throughout the property or on a room by room basis as they are redecorated over a number of years. When considering internal insulation, it is important to consider the effects of thermal bridging. Thermal bridging is where areas of an otherwise well insulated wall are connected to the outside by building fabric of a low insulation quality. This can lead to cold spots and condensation problems such as mold. Solid lintels, bay window separators and internal walls that connect to external walls can be sources of thermal bridging. In many instances the use of high performance but thin insulation to difficult areas and continuing the insulation some way along internal walls can help reduce thermal bridging. When insulating walls it is important to look for and minimise thermal bridges that may be left between areas that are insulated. OPTIONS EVALUATED Add 25mm PIR insulation internally to all external timber frame walls (Professional Measure) Add 25mm PIR insulation internally to all external sandstone walls (Professional Measure) Add 25mm PIR insulation internally to all timber loft room walls Add 25mm PIR insulation internally to solid loft room wall Add 50mm PIR insulation internally to all external timber frame walls (Professional Measure) Add 50mm PIR insulation internally to all external sandstone walls (Professional Measure) Add 50mm PIR insulation internally to all timber loft room walls Add 50mm PIR insulation internally to solid loft room wall Add 100mm PIR insulation internally to all external timber frame walls (Professional Measure) Add 100mm PIR insulation internally to all external sandstone walls (Professional Measure) Add 100mm PIR insulation internally to all timber loft room walls Add 100mm PIR insulation internally to solid loft room wall The symbols indicate whether they are included in a recommendation suite (see Section 4)

10 FLOOR ENERGY PROPORTIONS 0.5% of energy bills - 12 CO 2 EMISSIONS PROPORTIONS 0.6% of the CO 2 emissions 63 kg COMMENTS AND OBSERVATIONS The floors in the property are suspended floorboards, which will be losing heat to the cold void of the cellar beneath. DISCUSSION OF OPTIONS The easiest method for insulating suspended wooden floors is underneath the floorboards between the joists. The most difficult aspect is raising the floorboards and so it is worth carrying out any other under floor remediation work at the same time, such as lagging pipes, rewiring etc. When replacing the floorboard they should be pushed together tight and sealed. OPTIONS EVALUATED Add 100mm mineral wool insulation below the floorboards of all suspended floors Add 150mm mineral wool insulation below the floorboards of all suspended floors The symbols indicate whether they are included in a recommendation suite (see Section 4) *These are for conduction losses only. Losses due to floor draughts are included in the previous section Draughts

11 LIGHTING ENERGY PROPORTIONS 13.5% of energy bills CO 2 EMISSIONS PROPORTIONS 12.5% of the CO 2 emissions 1261 kg COMMENTS AND OBSERVATIONS All the lights and their usages were noted during the survey and the analysis results are based on these actual figures. Most of the lighting fixtures in the property are fitted with compact fluorescent lamps. There are many halogen lights fitted in the property, some of which can easily be replaced by more efficient bulbs. There are also some old fashioned incandescent and fluorescent lamps. DISCUSSION OF OPTIONS The quality of compact fluorescent lamps and their lifespan have increased significantly over the past several years and costs have come down considerably. Payback periods on their use now are measured in months rather than years. In addition, the LED (Light Emitting Diode) light quality is improving rapidly. In many circumstances they now perform comparably with standard lamps or compact fluorescents at a fraction of the operating cost and with extremely long lifespans. The range of prices for LEDs is large and generally reflects the quality of the product. If a suitable LED lamp can be found for a situation it is recommended that these are installed although it is recommended that you are happy with a product before purchasing in bulk. Good LED lamps are available for GU10 fittings. Dimmer LED lamps (40W equivalent) are available from some suppliers for bayonet / screw fitting bulbs. LED lamps are also available for MR16 bulbs, but the low voltage transformer will normally have to be replaced to cope with the lower power load. OPTIONS EVALUATED Replace all incandescent and fluorescent lights with compact fluorescent lights (CFL) (DIY) Replace all halogen lights with LED lights (DIY) The symbols indicate whether they are included in a recommendation suite (see Section 4)

12 APPLIANCES AND OTHER ELECTRICAL USE ENERGY PROPORTIONS 61.9% of energy bills CO 2 EMISSIONS PROPORTIONS 57.5% of the CO 2 emissions 5779 kg COMMENTS AND OBSERVATIONS All appliances and their usages were noted during the survey in order to determine whether there are any more efficient alternatives available. Taking note of their use also allows us to determine if there is a more efficient way to use them. DISCUSSION OF OPTIONS Due to the embedded energy costs of appliances, i.e. the energy used to make them, we normally only recommend immediate replacement for very inefficient older items. We recommend that any replacements are always of the top energy efficiency rating. As a short term measure before replacing the cold appliances it is worth cleaning the back of them all as this will increase efficiencies significantly. An electric oven is present: gas as a fuel is much cheaper and results in less carbon dioxide emissions than electricity so there will be benefit from changing to a gas oven. There is an electric hob and oven : gas as a fuel is much cheaper and results in less carbon dioxide emissions than electricity so there will be benefit from changing to gas alternatives We have evaluated the effect of a Voltage Optimisation 'Vphase' or 'VO4' device. This reduces the voltage of your mains electricity (to a level well within limits set by the EU and UK government). This allows savings on most electrical devices in your house without affecting their performance. Our analysis has been performed against your actual modelled baseline appliances using data published by manufactures about the expected savings for each type and age of appliance. Should appliances be upgraded (especially refrigeration appliances) then the savings expected may be less. OPTIONS EVALUATED Change electric kettle for an ecokettle (DIY) Replace both electric ovens with gas ovens Replace both electric ovens with new top rated versions (DIY) Stop using the room fan (DIY) Install voltage optimisation device The symbols indicate whether they are included in a recommendation suite (see Section 4)

13 HEATING AND HOT WATER The hot water is stored in a hot water cylinder that has spray foam insulation and a cylinder thermostat. removing the power shower pump and running the shower off the mains hot water with a low flow shower head. The heating system has a room thermostat and thermostatic radiator valves (TRVs) and the boiler has daily programming capabilities. The first floor and top floor bathrooms have electric underfloor heating. We have also modelled turning off the electric under floor heating in the bathrooms, since this form of heating is particularly expensive and very carbon intensive. Our modeling takes into account the additional heat output from the boiler to compensate. ENERGY PROPORTIONS 9.3% of energy bills CO 2 EMISSIONS PROPORTIONS 11.4% of the CO 2 emissions 1145 kg COMMENTS AND OBSERVATIONS The central heating boiler is only moderately efficient despite being relatively modern. The primary pipework between the boiler and the hot water cylinder is not insulated. DISCUSSION OF OPTIONS Modern boilers are up to 91% efficient and the effects of replacing the boiler have been evaluated. We have also looked at replacing the system with a combination system and removing the hot water cylinder. This reduces storage and distribution loses. Hot water pipes between the boiler and the hot water cylinder as well as those leaving the cylinder can be easily lagged to reduce unnecessary heat losses. In addition, a loose fill insulation jacket can be added to the hot water cylinder to reduce heat losses. These are very cheap and easy to install. NOTE: Neither of these initiatives will be necessary if the boiler is converted to a combi system. A weather compensator is a device that generates additional efficiency savings by adjusting the temperature of the water circulating through the heating system based on the outside air temperature, i.e. It adjusts the boiler output depending on whether it is a hot or a cold day. Reducing the hot water demand at point of use, e.g. shower heads, number of baths, washing up with a bowl rather than a running tap can all help to reduce the gas bills and CO2 emissions. An ultra low flow showerhead reduces the amount of water that needs to be heated. They work by aerating the water droplets so that you get just as wet but with less water. We have therefore modelled the effect of OPTIONS EVALUATED Add a Weather Compensator to the heating system Stop using the electric under floor heating (DIY) Remove the power shower pump and run the shower off the mains hot water with a low flow shower head Insulate the primary pipework (Professional Measure) Add an extra insulation jacket to the hot water cylinder Upgrade to a top specification gas boiler Upgrade to a top specification gas boiler and convert to a combination system The symbols indicate whether they are included in a recommendation suite (see Section 4)

14 HEATING PATTERNS COMMENTS AND OBSERVATIONS The house is heated to about 19 degrees at sensible heating times. OPTIONS EVALUATED Add programmable heating controls to all zones DISCUSSION OF OPTIONS We have modelled the effect of turning the heating off between May and September inclusive. If the building is significantly upgraded then it may be possible to further reduce the heating period. Savings are possible by zoning the house - ie a system to allow you to heat the upstairs to a different temperature and at different times to downstairs. This will allow savings, for example, if you choose to not heat bedrooms during the day when you need heat downstairs. The cost of installing a zoning system is based on a standard pipework system in the property. For more complicated pipework systems the cost can increase two- or three-fold. A cheaper alternative would be to install timed thermostatic radiator valves (TRVs), which would be wirelessly connected to a central thermostat. These would cost in the region of 90 per radiator, so the total cost is therefore dependent on the size of the house. The symbols indicate whether they are included in a recommendation suite (see Section 4) ENERGY PROPORTIONS n/a CO 2 EMISSIONS PROPORTIONS n/a

15 SOLAR PHOTOVOLTAIC MODULE (PV) COMMENTS AND OBSERVATIONS There is a south facing roof of reasonable size which is not shaded, so solar panels are a good possible option for the property. OPTIONS EVALUATED Install 2kWp (11m2) solar PV panels on the roof to generate electricity (Feed In Tariff at 21p used) ENERGY PROPORTIONS n/a CO 2 EMISSIONS PROPORTIONS n/a DISCUSSION OF OPTIONS PV modules can be installed on sloping roofs, flat roofs and even vertical walls. With a property connected to the National Grid, the electricity provided by PV modules is either used by the appliances and lighting in the property or when it exceeds usage can be sold to the National Grid. The recently introduced Feed In Tariff (FIT), a government initiative, provides a significant incentive for solar PV panels by requiring suppliers to buy PV generated electricity from householders for about 4 times more than the standard supply rate of electricity, even if the generated electricity is used by the householder before it can be exported. Estimating the exact contribution PV modules can offer is difficult to assess. There are a variety of different estimates ranging from pessimistic to those which may be overly optimistic provided by some manufacturers and installers. Our model is based on the Government s Standard Assessment Procedure for Energy Rating of Dwellings (SAP) and so is independent of manufactures or installers. In most cases solar PV installations in England and Scotland will not require planning permission as they qualify as permitted development (see section 5.5 for details). We always recommend that you check with your local authority to ensure that planning permission is not required. Please see section 5.4 for more information on the Government s Feed-in-Tariffs (FITS). The symbols indicate whether they are included in a recommendation suite (see Section 4)

16 SOLAR HOT WATER COMMENTS AND OBSERVATIONS The south facing roof could also be used for a solar thermal system providing for some of the hot water. section 5.5 for details). We always recommend that you check with your local authority to ensure that planning permission is not required. DISCUSSION OF OPTIONS Solar thermal collectors can use the sun s energy to heat water for domestic use. As the sun s maximum intensity and day lengths do not coincide with the normal heating season, in most circumstances a solar thermal system is best employed for domestic hot water use only and not central heating. There may however be instances when it can provide some of both. Solar thermal collectors were analysed but not recommended due to very long payback periods. However, the government has announced the Renewable Heat Initiative is due to be rolled out next year, which establishes financial rewards for generating heat renewably, similar to the Feed-In- Tariff for renewable electricity. Solar thermal should be investigated again once the government has established the price for renewable heat. ENERGY PROPORTIONS n/a CO 2 EMISSIONS PROPORTIONS n/a Solar thermal collectors either come as flat plate or evacuated tube. Flat plates are usually cheaper but do not have the flexibility of directional pointing that evacuated tube collectors have. In general flat plate collectors are more suitable due to costs for south facing sloping roofs and evacuated tube for flat roofs and East or West facing roofs. As with PV estimating the exact contribution solar thermal collectors can offer is difficult to assess and again there are a variety of different estimates ranging from pessimistic to those which may be overly optimistic provided by some manufacturers and installers. Our model is again based on the Government s Standard Assessment Procedure for Energy Rating of Dwellings (SAP) and so is independent of manufactures and installers. It is important to note that most boilers, especially combination boilers, and all non-specific hot water tanks are not suitable for a solar thermal system and so may also need to be replaced when a system is installed. As for solar PV, in England and Scotland most solar thermal panels will not require planning permission as they qualify as permitted development (see OPTIONS EVALUATED Install 4m2 thermal solar panels to heat the hot water The symbols indicate whether they are included in a recommendation suite (see Section 4)

17 17 Summary of Bespoke Recommended Packages Based on your budget, ambitions and timescales we group different measures that we evaluate into bespoke recommended packages in order to show their net effect. This is a high level summary of what could be achieved with the packages we have put together for you and your home. The rest of the report gives you all the detail behind these (and more...) Annual saving: 1,458 Total cost: 460 Payback: 0.3 years Annual saving: 1,679 Total cost: 3,505 Payback: 2.1 years Annual saving: 1,821 Total cost: 7,035 Payback: 3.9 years Annual saving: 2,362 Total cost: 15,835 Payback: 6.7 years Annual CO 2 saving Annual CO 2 saving Annual CO 2 saving Annual CO 2 saving Measures that have paybacks shorter than 5 years and cost less than 400 each: Measures that have paybacks shorter than 15 years and cost less than 1,250 each. Measures that have paybacks shorter than 25 years and cost less than 2,000 each. Measures that have paybacks shorter than 25 years and cost less than 10,000 each. Stop using the room fan Block passive vent Keep adjustable passive vent always closed Stop using the electric under floor heating Replace all halogen lights with LED lights Replace all incandescent and fluorescent lights with compact fluorescent lights (CFL) All measures PLUS: Change electric kettle for an eco-kettle Stop using chimney and block with removable chimney balloon Add programmable heating controls to all zones Add an extra insulation jacket to the hot water cylinder Insulate the primary pipework Remove the power shower pump and run the shower off the mains hot water with a low flow shower head Add 50mm PIR insulation internally to all pitched roofs All measures PLUS: Install voltage optimisation device Replace both electric ovens with gas ovens Draughtproof all external doors with weatherstrip Upgrade to a top specification gas boiler and convert to a combination system Add 100mm PIR insulation internally to all pitched roofs All measures PLUS: Install 2kWp (11m2) solar PV panels on the roof to generate electricity (Feed In Tariff at 21p used)

18 ADDITIONAL INFORMATION 18 Detailed analysis It should be noted that payback periods are based purely on the internal payback that the measures provide against not doing the work and so do not take into account any capital gain due to the increased capital value that they add. For example by comparison if the similar payback period for an extension, cost around 30,000 was calculated using the same model it would be infinite, and for a Prius, cost around 20,000, may have a payback period upward of 35 years using UK government data. RANKED BY PAYBACK PERIOD INITIATIVE AREA DETAILS DIY / PROFESSIONAL INSTALL ANNUAL FUEL COST SAVING INSTALL COST DRAUGHTS Keep adjustable passive vent always closed DIY APPLIANCES Stop using the room fan DIY HEATING Stop using the electric under floor heating DIY LIGHTING Replace all incandescent and fluorescent lights with compact fluorescent lights (CFL) PAYBACK PERIOD (yrs) DIY DRAUGHTS Block passive vent DIY LIGHTING Replace all halogen lights with LED lights DIY HOT WATER Add an extra insulation jacket to the hot water cylinder Pro DRAUGHTS Stop using chimney and block with removable chimney balloon DIY APPLIANCES Change electric kettle for an eco-kettle DIY HOT WATER Insulate the primary pipework Pro ROOFS Add 25mm PIR insulation internally to all pitched roofs Pro DRAUGHTS Block passive vent Pro HEAT SETTINGS Add programmable heating controls to all zones DIY 85 1, ROOFS Add 50mm PIR insulation internally to all pitched roofs Pro 81 1, HOT WATER Remove the power shower pump and run the shower off the mains hot water with a low flow shower head Pro APPLIANCES Install voltage optimisation device Pro

19 ADDITIONAL INFORMATION 19 INITIATIVE AREA DETAILS DIY / PROFESSIONAL INSTALL RENEWABLES Install 2kWp (11m2) solar PV panels on the roof to generate electricity (Feed In Tariff at 21p used) ANNUAL FUEL COST SAVING INSTALL COST PAYBACK PERIOD (yrs) Pro 541 8, HEATING Upgrade to a top specification gas boiler and convert to a combination system Pro 122 2, ROOFS Add 100mm PIR insulation internally to all pitched roofs Pro 88 1, DOOR DRAUGHTS Draughtproof all external doors with weatherstrip DIY APPLIANCES Replace both electric ovens with gas ovens Pro HEATING Upgrade to a top specification gas boiler Pro 90 1, WALLS Add 25mm PIR insulation internally to solid loft room wall Pro WALLS Add 50mm PIR insulation internally to solid loft room wall Pro 45 1, WALLS Add 100mm PIR insulation internally to solid loft room wall Pro 50 1, WALLS Add 25mm PIR insulation internally to all external sandstone walls Pro 91 2, WALLS Add 50mm PIR insulation internally to all external sandstone walls Pro 110 3, ROOFS Add 50mm PIR insulation internally to the flat balcony roof Pro ROOFS Add 25mm PIR insulation internally to the flat balcony roof Pro ROOFS Add 100mm PIR insulation internally to the flat balcony roof Pro WALLS Add 100mm PIR insulation internally to all external sandstone walls Pro 122 4, FLOOR DRAUGHTS Seal floors and skirtings of all floors DIY DOOR DRAUGHTS Draughtproof all external doors with a rebated brush system Pro DRAUGHTS Replace passive vent with heat recovery fan Pro APPLIANCES Replace both electric ovens with new top rated versions DIY ROOFS DOORS SOLAR HOT WATER FLOORS Top up loft insulation to 300mm (12") by adding an extra 225mm (9") mineral wool insulation between and over joists Replace rear kitchen and family room doors with doors that meet building regulations Pro Pro 18 1, Install 4m2 thermal solar panels to heat the hot water Pro 49 4, Add 150mm mineral wool insulation below the floorboards of all suspended floors Pro 15 1,

20 ADDITIONAL INFORMATION 20 INITIATIVE AREA DETAILS DIY / PROFESSIONAL INSTALL FLOOR DRAUGHTS ANNUAL FUEL COST SAVING INSTALL COST PAYBACK PERIOD (yrs) Seal floors and skirtings of all floors Pro DRAUGHTS Replace passive vent with humidistat controlled vent Pro DOORS Replace front door with a door that meets building regulations Pro WALLS Add 100mm PIR insulation internally to all timber loft room walls Pro 28 3, WALLS Add 50mm PIR insulation internally to all timber loft room walls Pro 21 2, WALLS Add 25mm PIR insulation internally to all timber loft room walls Pro 14 2, FLOORS Add 100mm mineral wool insulation below the floorboards of all suspended floors Pro 14 2, ROOFS Add 100mm PIR insulation internally to the flat dormer roof Pro 5 1, ROOFS Add 50mm PIR insulation internally to the flat dormer roof Pro WALLS Add 100mm PIR insulation internally to all external timber frame walls Pro DRAUGHTS Replace louvred fan with heat recovery fan Pro WALLS Add 50mm PIR insulation internally to all external timber frame walls Pro ROOFS Add 25mm PIR insulation internally to the flat dormer roof Pro WINDOWS Replace 6mm double glazed windows with windows that meet building regulations Pro 18 6, WALLS Add 25mm PIR insulation internally to all external timber frame walls Pro WINDOWS Install secondary glazing to single glazed windows Pro WINDOWS Replace single glazed windows with windows that meet building regulations Pro WINDOWS WINDOWS Replace 12mm double glazed windows with windows that meet building regulations Replace 6mm double glazed windows with high specification triple glazed windows Pro 20 11, Pro 14 8, WINDOWS Replace single glazed windows with high specification triple glazed windows Pro WINDOWS Replace 12mm double glazed windows with high specification triple glazed windows Pro 20 13, CONTROLS Add a Weather Compensator to the heating system Pro WINDOWS Replace 16mm double glazed windows with windows that meet building regulations Pro 1 1, WINDOWS Replace 16mm double glazed windows with high specification triple glazed Pro 0 1,

21 ADDITIONAL INFORMATION 21 INITIATIVE AREA DETAILS DIY / PROFESSIONAL INSTALL windows ANNUAL FUEL COST SAVING INSTALL COST PAYBACK PERIOD (yrs)

22 Our awards: We belong to: This report is printed on recycled paper.