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From: Seth Bossung [seth@intentionarchitecture.com]
Sent: Friday, March 13, 2015 6:25 PM
To: Coleman Wise; Balz Arrigoni
Subject: Fwd: iTEC RESNET: Arrigoni - Garmisch
Hello Coleman and Balz
I am including the results of the blower door test I performed on your home on Garmisch Drive earlier today.
I have to say I was incredibly impressed with the result. The 2012 IECC (International Energy Conservation Code) requires a home to have no greater than 3 air changes per hour at
50 pascals of pressure (ACH50) - itself an admirable threshold. Your home, however tested at 1.7 ACH50, exceeding the threshold by a large margin. Well done! For context, the next
closest home I have tested had an ACH50 figure of 4.8, good enough for the 2009 IECC but not good enough for current code. Most homes I have tested (over 120 in the past couple
of years, of varying ages) are in the 4- 20 range.
I credit your excellent thermal performance to a number of factors, namely:
1. Very simple roof forms with a minimum of dormers, bump outs etc.;
2. Continuous rigid insulation at the roof plane, with very few, if any, penetrations (such as can lights, ducts, etc - these are typically extremely leaky);
3. A very continuous thermal envelope at the wall framing, with minimal penetrations for plumbing, electrical wires, ducts, etc.
4. Careful attention to air sealing at the factory, including careful taping of the windows to reduce air infiltration. The high-tech membranes used in this building are unconventional
by American standards (we tend to wrap the insides of our buildings with plastic, and are generally not particularly conscious of continuity of the air sealing, resulting in lots
of little leaks at the window frames, electrical outlet boxes, plumbing penetrations etc.
5. Excellent seals at the doors and windows;
6. A high-efficiency boiler, which eliminates the need for an open combustion duct as seen in many homes built without high-efficiency boilers.
7. No attic - an even blanket of snow remained on your home (compared to your neighbors) showing very little air or thermal leakage through the roof.
8. No crawlspace.
All in all, I think a lot of designers and builders could learn from your example of excellent construction and attention to detail. I look forward to testing more homes as well-built
and thoughtfully designed as this one.
Best
Seth
seth bossung
INTENTION ARCHITECTURE
http://www.intentionarchitecture.com
www.intentionarchitecture.com
53 red barn edwards CO 81632
970.306.6612
Begin forwarded message:
From: Seth Bossung <
mailto:seth@intentionarchitecture.comseth@intentionarchitecture.com>
Subject: iTEC RESNET: Arrigoni - Garmisch
Date: March 13, 2015 at 4:09:34 PM MDT
To: Seth Bossung <
mailto:seth@intentionarchitecture.comseth@intentionarchitecture.com>
iTEC - RESNET Test Report
Test Results
Corrected CFM50
1,098
CFM50
Accuracy Level
Standard
Air Changes per Hour @ 50 Pa
1.72
ACH50
Effective Leakage Area (ELA)
60.4
Sq. in.
Test Date
3/13/15
Customer Information
Project Number
1
Name
Garmisch Haus LLC
Address
2476 S Garmisch Drive
City
Vail
State/Province
CO
Zip
81657
Phone
Email
Building Information
Address
2476 S Garmisch Dr
City
Vail
State/Province
CO
Zip
81657
Year Constructed
2014
Volume
38,321.0
CuFt
Floor Area
3,832.1
SqFt
Building Height
29.5
Ft
Test Readings
Nominal Building Pressure
-50.0
Pa
Nominal Fan Flow
1,108
CFM
Nominal Fan Pressure
5.0
Pa
Fan Configuration
Open
Fan Model
Model 3 110V
Fan Serial Number
Pressure Gauge Model
DG-700
Pressure Gauge Serial Number
9253-6-700
Inside Temperature
65.0
F
Outside Temperature
32.0
F
Time Averaging Period
10.0
Secs
Baseline Readings
Average Baseline
-0.5
Pa
Baseline Range
3.2
Pa
Location Information
Geo Tag Location
Longitude: -106.58034
Latitude: 39.64211
Time Stamp
12/22/14, 1:30 PM
Site Altitude
8,026.0
Ft
Business Information
Business Name
Intention Architecture
Address
53 Red Barn
City
Edwards
State/Province
CO
Zip
81632
Phone
(970) 306-6612
Fax
Email
mailto:Seth@intentionarchitecture.com
Seth@intentionarchitecture.com
Website
http://www.intentionarchitecture.com/
www.intentionarchitecture.com
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Seth Bossung
Intention Architecture
(970) 306-6612