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Ventilation Commissioning

Thomas Varney

207-357-2970

Tomv232@yahoo.com 

BPI Professional #5019699

SFMO #INS1116

TPI #65

Serving Parts of 

Androscoggin, Cumberland, Oxford

and Sagadahoc Counties

The code test should be done when the building is finished.  

Save $1700 on your next blower door test by following the building code N1102.4.1.1 and passing the leakage test. The 2021 building code also makes passing much easier for houses under 1500sf and for attached two family dwellings, they can now have twice as much air leakage.

 Commissioning of exhaust fans, balanced whole house ventilation and MUAS’s. Commissioning can solve the problem of excess noise and door slamming. I recommend an off/on switch for the continuous bath fan with a motion detector for the

boost and light. This will keep the house ventilated without confusing the occupant. If needed, the range hood fan can also be used.

Testing can be conducted as soon

as the system is air sealed. Duct testing should be done before a blower door test as any duct leakage will add to the blower door test. Click M1601.4.1 for code to pass leakage test. Mastic is needed to ensure passing, aluminum tape alone will not work.

One & Two Family Dwellings

Duct Leakage Testing

Pricing

Blower Door Test - $300

Duct Leakage Test  

Up To 1500sf - $300

1501-3000 = $400

3001-4500 = $500

4501-6000 = $600

Commissioning - By the Job

ASHRAE 62.2 - By the job

ASHRAE 62.2 2019

New and Existing Dwellings

Ventilation Compliance

Recent Blower Door Test

This builder consistently passes the blower door test.

The building is 1234 square feet and was tested using the 

enclosure surface area (ESA). The leakage is 291 cfm and the test

result is 0.08 cfm per square foot at 3758 sf. If I had used the ACH50

test volume of 11088 cubic feet the result is 1.57 ACH50. It passes

both easily but the ESA test would allow up to 1127 cfm leakage

and the ACH50 would only allow up to 554 cfm. The ESA test

allows twice the air leakage.