ASHRAE Journal - May 2011 - 62

building sciences

Photo 5 (above): Effective Draftstopping. Notice the rigid material behind the large soaking tub/whirlpool framing on the exterior wall. Notice the rigid material going up the exterior wall where the shower is going to be. Notice the big smile on the VP of construction for a major, major production home builder in Chicagoland. No comfort complaints for him anymore because there are no big holes. Photo 6 (top right): Tub on Exterior Wall Before Tub Installation. Notice the rigid material on the exterior wall where the one-piece shower/tub thingy is going to be. Photo 7 (right): Tub on Exterior Wall After Tub Installation. Notice the rigid material on the exterior wall behind where the one-piece shower/tub thingy is. Notice the even bigger smile on that VP of construction. a pressurization test.” I said what is a pressurization test? And you can guess the rest. It turns out that the Swedes figured out that when they got rid of the big holes in their houses it was pretty easy to get below 3 ach@50 Pa. The Swedes, being Swedes, put that value right into their building code. My problem with the 3 ach@50 Pa was that it was Swedish. Actually, it wasn’t my problem; the 3 ach@50 Pa was a problem for a bunch of folks in Saskatoon, SK, who had just finished building around 10 ultratight ugly boxes that passed for houses. Recall the year was 1982. These 10 ultratight ugly boxes (did I mention that they were ugly and boxes?) were hermetically sealed in plastic and had double walls and lots of other stuff that seemed pretty strange to me. Anyway, these houses were all just below 1 ach@50 Pa. So, the Saskatoon Mafia pushed 1 ach@50 Pa as the national standard for this national program. I thought, you have got to be kidding, right? A sample size of 10 weird houses constructed in Saskatoon is going to set a national standard? Hey, we were Canadians, not Swedes, why bother to measure enough stuff to get a representative sample when you are a true believer? I said let’s pick
62 ASHRAE Journal

2 ach@50 Pa, which was a wild ass guess (WAG). I pointed out that even the Swedes, who build houses like they build furniture, picked 3 ach@50 Pa for their national standard. I figured that we could do better than the Swedes, but not that much better. I mean, we regularly beat the Swedes at hockey, so we should be able to do it with building tightness, right? That argument was actually more logical than any other argument presented at the time. I pushed back hard, but not hard enough, the Saskatoon Mafia were well connected, and we ended up with 1.5 ach@50 Pa as a compromise for the national program called R-2000. Problem was, nobody outside of Saskatoon had ever constructed appreciable numbers of houses at 1.5 ach@50 Pa. Under the test phase/demonstration phase of the program we constructed about 20 test houses with real builders in different provinces and found that it was very, very difficult to get to 1.5 ach@50 Pa in houses that looked like a house someone would actually want to live in, unless they lived in Saskatoon. Did I mention that it was very, very difficult? I thought establishing 1.5 ach@50 Pa as a standard was going to be a train wreck because the number was too low for production builders to achieve, and the R-2000 program would
ashrae.org May 2011



ASHRAE Journal - May 2011

Table of Contents for the Digital Edition of ASHRAE Journal - May 2011

ASHRAE Journal - May 2011
Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
Seismic Restraint
Plug Load Design Factors
Technology Award Case Studies:
State-of-Art School
Green School Lab
Eco-Friendly, Affordable, School
Building Sciences
Special Section
InfoCenter
Solar NZEB Project
Emerging Technologies
IAQ Applications
Washington Report
International Column
Products
People
Classified Advertising
Advertisers Index
ASHRAE Journal - May 2011 - Intro
ASHRAE Journal - May 2011 - ASHRAE Journal - May 2011
ASHRAE Journal - May 2011 - Cover2
ASHRAE Journal - May 2011 - 1
ASHRAE Journal - May 2011 - 2
ASHRAE Journal - May 2011 - Contents
ASHRAE Journal - May 2011 - Commentary
ASHRAE Journal - May 2011 - 5
ASHRAE Journal - May 2011 - Industry News
ASHRAE Journal - May 2011 - 7
ASHRAE Journal - May 2011 - 8
ASHRAE Journal - May 2011 - 9
ASHRAE Journal - May 2011 - 10
ASHRAE Journal - May 2011 - 11
ASHRAE Journal - May 2011 - 12
ASHRAE Journal - May 2011 - 13
ASHRAE Journal - May 2011 - Letters
ASHRAE Journal - May 2011 - 15
ASHRAE Journal - May 2011 - 16
ASHRAE Journal - May 2011 - 16a
ASHRAE Journal - May 2011 - 16b
ASHRAE Journal - May 2011 - 17
ASHRAE Journal - May 2011 - Meetings and Shows
ASHRAE Journal - May 2011 - 19
ASHRAE Journal - May 2011 - Seismic Restraint
ASHRAE Journal - May 2011 - 21
ASHRAE Journal - May 2011 - 22
ASHRAE Journal - May 2011 - 23
ASHRAE Journal - May 2011 - 24
ASHRAE Journal - May 2011 - 25
ASHRAE Journal - May 2011 - 26
ASHRAE Journal - May 2011 - 27
ASHRAE Journal - May 2011 - 28
ASHRAE Journal - May 2011 - 29
ASHRAE Journal - May 2011 - Plug Load Design Factors
ASHRAE Journal - May 2011 - 31
ASHRAE Journal - May 2011 - 32
ASHRAE Journal - May 2011 - 33
ASHRAE Journal - May 2011 - 34
ASHRAE Journal - May 2011 - 35
ASHRAE Journal - May 2011 - State-of-Art School
ASHRAE Journal - May 2011 - 37
ASHRAE Journal - May 2011 - 38
ASHRAE Journal - May 2011 - 39
ASHRAE Journal - May 2011 - 40
ASHRAE Journal - May 2011 - 41
ASHRAE Journal - May 2011 - 42
ASHRAE Journal - May 2011 - 43
ASHRAE Journal - May 2011 - Green School Lab
ASHRAE Journal - May 2011 - 45
ASHRAE Journal - May 2011 - 46
ASHRAE Journal - May 2011 - 47
ASHRAE Journal - May 2011 - 48
ASHRAE Journal - May 2011 - 49
ASHRAE Journal - May 2011 - 50
ASHRAE Journal - May 2011 - 51
ASHRAE Journal - May 2011 - Eco-Friendly, Affordable, School
ASHRAE Journal - May 2011 - 53
ASHRAE Journal - May 2011 - 54
ASHRAE Journal - May 2011 - 55
ASHRAE Journal - May 2011 - 56
ASHRAE Journal - May 2011 - 57
ASHRAE Journal - May 2011 - Building Sciences
ASHRAE Journal - May 2011 - 59
ASHRAE Journal - May 2011 - 60
ASHRAE Journal - May 2011 - 61
ASHRAE Journal - May 2011 - 62
ASHRAE Journal - May 2011 - 63
ASHRAE Journal - May 2011 - 64
ASHRAE Journal - May 2011 - 65
ASHRAE Journal - May 2011 - 66
ASHRAE Journal - May 2011 - 67
ASHRAE Journal - May 2011 - InfoCenter
ASHRAE Journal - May 2011 - 69
ASHRAE Journal - May 2011 - 70
ASHRAE Journal - May 2011 - 71
ASHRAE Journal - May 2011 - 72
ASHRAE Journal - May 2011 - 73
ASHRAE Journal - May 2011 - 74
ASHRAE Journal - May 2011 - 75
ASHRAE Journal - May 2011 - 76
ASHRAE Journal - May 2011 - 77
ASHRAE Journal - May 2011 - Solar NZEB Project
ASHRAE Journal - May 2011 - 79
ASHRAE Journal - May 2011 - 80
ASHRAE Journal - May 2011 - 81
ASHRAE Journal - May 2011 - 82
ASHRAE Journal - May 2011 - 83
ASHRAE Journal - May 2011 - 84
ASHRAE Journal - May 2011 - 85
ASHRAE Journal - May 2011 - 86
ASHRAE Journal - May 2011 - 87
ASHRAE Journal - May 2011 - 88
ASHRAE Journal - May 2011 - 89
ASHRAE Journal - May 2011 - Emerging Technologies
ASHRAE Journal - May 2011 - 91
ASHRAE Journal - May 2011 - 92
ASHRAE Journal - May 2011 - 93
ASHRAE Journal - May 2011 - 94
ASHRAE Journal - May 2011 - 95
ASHRAE Journal - May 2011 - IAQ Applications
ASHRAE Journal - May 2011 - 97
ASHRAE Journal - May 2011 - 98
ASHRAE Journal - May 2011 - 99
ASHRAE Journal - May 2011 - 100
ASHRAE Journal - May 2011 - 101
ASHRAE Journal - May 2011 - Washington Report
ASHRAE Journal - May 2011 - 103
ASHRAE Journal - May 2011 - International Column
ASHRAE Journal - May 2011 - 105
ASHRAE Journal - May 2011 - 106
ASHRAE Journal - May 2011 - Products
ASHRAE Journal - May 2011 - 108
ASHRAE Journal - May 2011 - People
ASHRAE Journal - May 2011 - Classified Advertising
ASHRAE Journal - May 2011 - 111
ASHRAE Journal - May 2011 - Advertisers Index
ASHRAE Journal - May 2011 - Cover3
ASHRAE Journal - May 2011 - Cover4
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