Joseph Lstiburek, Ph.D., P.Eng, ASHRAE Fellow. Building Science. Adventures In Building Science. presented by

Transcription

1 Joseph Lstiburek, Ph.D., P.Eng, ASHRAE Fellow Building Science Adventures In Building Science presented by

2 Build Tight - Ventilate Right 2

3 Build Tight - Ventilate Right How Tight? What s Right? 3

4 Air Barrier Metrics Material Assembly Enclosure Pa Pa Pa Pa Pa Pa 4

5 Getting rid of big holes Getting rid of smaller holes Getting German 3 ach@ ach@ ach@50 5

6 Best As Tight as Possible - with - Balanced Ventilation Energy Recovery Distribution and Mixing Source Control - Spot exhaust ventilation Filtration Material selection 6

7 Dilution Is Not The Solution To Indoor Pollution Source Control 7

8 !'L-%Z*SCZ*>;%Z*SC[CZ*014.$-L-%/$(Z*:CZ*2BPB Y

9 \

10 Dilution For People Source Control For The Building 10

11 Ventilation Rates Are Based on Odor Control Health Science Basis for Ventilation Rates is Extremely Limited 11

12 Ventilation Rates Are Based on Odor Control Health Science Basis for Ventilation Rates is Extremely Limited Almost Nothing Cited Applies to Housing 12

13 Ventilation Rates Are Based on Odor Control Health Science Basis for Ventilation Rates is Extremely Limited Almost Nothing Cited Applies to Housing The Applicable Studies Focus on Dampness 13

14 ASHRAE Standard 62.2 calls for 7.5 cfm per person plus 0.03 cfm per square foot of conditioned area Occupancy is deemed to be the number of bedrooms plus one 14

15 ASHRAE Standard 62.2 calls for 7.5 cfm per person plus 0.03 cfm per square foot of conditioned area Occupancy is deemed to be the number of bedrooms plus one Outcome is often bad part load humidity problems, dryness problems, energy problems 15

16 IRC 2015 calls for 7.5 cfm per person plus 0.01 cfm per square foot of conditioned area Occupancy is deemed to be the number of bedrooms plus one 16

17 17

18 Recommended Range of Relative Humidity Above 25 percent during winter Below 70 percent during summer

19 Building Science Corporation Joseph Lstiburek 19

20 20

21 21

22 Building Science Corporation Joseph Lstiburek 22

23 Building Science 2009 Joseph Lstiburek Pressures and IAQ 23

24 Building Science 2009 Joseph Lstiburek Pressures and IAQ 24

25 Building Science 2009 Joseph Lstiburek Pressures and IAQ 25

26 Building Science 2009 Joseph Lstiburek Pressures and IAQ 26

27 Building Science 2009 Joseph Lstiburek Pressures and IAQ 27

28 Building Science 2009 Joseph Lstiburek Pressures and IAQ 28

29 Building Science 2009 Joseph Lstiburek Pressures and IAQ 29

30 Mechanical Systems Building Science Corporation Joseph Lstiburek 30

31 Mechanical Systems Cooling System To Make It Cold Building Science Corporation Joseph Lstiburek 31

32 Mechanical Systems Cooling System To Make It Cold Dehumidification System To Make It Dry Building Science Corporation Joseph Lstiburek 32

33 Mechanical Systems Cooling System To Make It Cold Dehumidification System To Make It Dry Heating System To Make It Warm Building Science Corporation Joseph Lstiburek 33

34 Mechanical Systems Cooling System To Make It Cold Dehumidification System To Make It Dry Heating System To Make It Warm Energy Recovery System To Keep It Cold and Dry and Warm and Comfortable Building Science Corporation Joseph Lstiburek 34

35 Mechanical Systems Cooling System To Make It Cold Dehumidification System To Make It Dry Heating System To Make It Warm Energy Recovery System To Keep It Cold and Dry and Warm and Comfortable Distribution System To Make It Uniform Building Science Corporation Joseph Lstiburek 35

36 Mechanical Systems Cooling System To Make It Cold Dehumidification System To Make It Dry Heating System To Make It Warm Energy Recovery System To Keep It Cold and Dry and Warm and Comfortable Distribution System To Make It Uniform Range Hoods Are A Special Kind of Hell Building Science Corporation Joseph Lstiburek 36

37 Don t Try to Combine Them... Building Science Corporation Joseph Lstiburek 37

38 Building Science Corporation Joseph Lstiburek 38

39 Kitchen Exhaust Hoods 39

40 40

41 41

42 42

43 43

44 44

45 45

46 46

47 47

48 48

49 Clothes Dryers 49

50 50

51 51

52 Fireplaces 52

53 53

54 54

55 55

56 56

57 57