Team Housewise SHAC 2009 Retrofit of a 1950s State House Dr. Guy Penny SB10 Wellington
Kathryn Scott, Jeremy Gabe, Paula Wilkie, Michael Krausse Chris Bullen, Marwa Saffi Terry Foster David Vui-Talitu, Stuart Bracey, Taniela Mataele, Liai Burns, Guy Penny Barbara and her 4 children Eru Cameron Builder Michael Pepper Architect
SHaC Criteria HNZC Tenant TEAM Housewise O B J E C T I V E S Healthy indoor envt (air quality ) Suitable Simple - Low energy use - Energy efficiency Low city water use & waste water Affordable Reduce, recycle & reuse Supporting Sustainable Communities Effective communications Healthy Home - Indoor air quality - Safe / secure -Fit for purpose -Consistent with social housing -Repeatable Energy efficient Energy affordability Water efficient Affordable capital, operational and maintenance Minimise landfill waste Use local suppliers & trades Tenants privacy maintained -Monitoring (performance, life cycle) -Trial/Learning/Demonst -Educate/inform tenant Minimise risk -Warmer/Drier in winter -Children s health issues addressed -More open & usable -Better access to yard -Secure/ safe/ private -More storage No additional costs Privacy Learn Meet SHaC criteria Meet HNZC needs and budget Meet other partners needs where feasible Meet Tenant s needs (including privacy) Include Tenant in design, technologies & process Robust evaluation to build consensus Informed decisions Complete retrofit for judging Report findings to organisations
Characteristics of the house Constructed in 1956, Glen Innes, Auckland Weatherboard, concrete tile roof, brick base Approx 90 m.sq 2 bedrooms and a sun room Draughty and cold in winter (at times), little insulation Large section 681m.sq with vege garden Poor access to yard / inefficient spaces / dark lounge-living Large overhanging hedge on northern side Poor fencing and dilapidated garage
OBJECTIVES Team Housewise : More usable SHaC spaces, 2009 fit for Retrofit purpose, of 1950s passive State House solar Reconfiguration New single bedroom (now 3 bdrm) Open up living- dining-kitchen (new) Remove chimney Add deck and access to yard View to backyard from kitchen Improved storage Remove old garage/ trim hedge
Team Housewise Reconfiguration SHaC 2009 Retrofit of 1950s State House N X X X X X X X BEFORE AFTER
OBJECTIVES : Healthy home, warmer, drier, reduce energy use Improved Insulation Ceiling : From <R1.0 to >R5.0 Walls : From no insulation to >R2.5 Floor : From no insulation to >R2.6 Thermal drapes with pelmets Low-e glass in bedrooms All hot water pipes insulated
OBJECTIVES: Team Housewise Healthy Home, SHaC warm, 2009drier, energy Retrofit efficient of 1950s State & reduction House Heating and Ventilation 2.4 kw radiant heater (thermal mass) Heat recovery ventilation (fresh air) household distribution Mechanical ventilation from toilet and bathroom/shower Remove passive vents (except laundry) New external Rheem A551310 hot water heat pump (310 litre; 3.6kW) Energy efficient lights Provided tenant with Centameter
OBJECTIVE : Reduce city water use & peak stormwater, trial rain harvesting Water Use Low flow taps Low flow dual flush toilet Low flow shower head 7200 litre water tank rain harvest system to toilet / outdoor tap
HERS Rating 1. Pre-retrofit HERS rating 2. Estimated 5780 kwh /year (approx. $1330/year ) 3. Post-retrofit HERS rating 4. Overall energy requirements will fall by 60% from 260 to 106 MJ/m2/ yr 5. Estimated 2355 kwh/year (approx. $550/yr) 6. Water heating rating increased from a 4 to a 5.5 star 7. Decrease in water heating energy from $916 to $330 per year.
Other features of the project Many section improvements Waste Management - minimise construction waste to landfill (recycle and reuse) Materials generally HNZC standard materials Communications - respect tenant privacy - internal reporting and via SHaC Induction with tenant how to use equipment Monitoring
MONITORING (Post SHaC funded by HNZC) Vital part of project to see what works & how interventions perform Over one year, but potential for longer and to change/adjust interventions 1. Temperature & relative humidity in each bedroom & living room 2. Carbon dioxide levels in bedrooms and living room 3. Total household electricity consumption 4. Electricity consumption : LHZ heater; Hot water heat pump; Cleanaire system 5. Total household water consumption 6. Water consumption from rainwater tank and water used by hot water heat pump 7. Tenant-family Interviews ( 4 x quarterly)
Summary Team Housewise SHaC 2009 Retrofit of 1950s State House 1. Can retrofit 1950s house to modern/sustainable standard for < $100k 2. Team Effort - Residents input throughout project important - Builder and Architect willing to learn, take on advice, try new things and be involved in process - no one has all the answers 3. Must consider property improvements - not just the house 4. Reconfiguration, insulation are biggest impacts (?) 5. Thermal drapes & pelmets good alternative to double glazing (?) 6. Water tank probably too big for purpose (?) 7. Monitoring necessary to demonstrate expected performance (could include in future SHaCs)
Team Team Housewise Housewise SHaC 2009 wants Retrofit of to 1950s thank State House and acknowledge: GreenStuf Autex: The Green stuff wall insulation GreenStuf Autex Industries Ltd CLEANAIRE Heat Recovery Ventilator Tim Bishop and the SHaC Team Terry Stones: Airconditioning Services (NZ) Ltd: Cleanaire Heat Recovery System Eru Cameron: Eru Cameron Builders Ltd Grant Cameron: LHZ Heaters Grant Dunford (Negawatt resources) advice and LHZ heater Michael Pepper Architects THANK YOU