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buffalobillpatrick · 03-11-17, 10:13 AM

I bought a small HRV, about 75% efficiency.
Fantech FLEX 100H Heat Recovery Ventilator (HRV) CFM, 0.4 W.C., 50-106 CFM
It will suck stale humid air from master bathroom & return fresh air into great room.

The 3 toilet rooms will all have:
Panasonic FV-11VQ5 WhisperCeiling 110 CFM Ceiling Mounted Fan, White
The makeup air will mostly be drawn in through the HRV, I hope.

Upon running the Builditsolar Home Heat Loss Calculator, air infiltration will most likely be my biggest heat loss. Heating season is about 7 months. No A/C needed.

So I will try very hard to air seal as best I can. The suspect areas are the upstairs framed gable ends, all doors & windows.

I have a high volume lab hood type air pump.
What is a good strategy for finding air leaks, smoke? in cold weather use IR gun?

The spray foam company has agreed to totally cover the top plate areas where the trusses sit on the concrete walls.

BTW, closed cell SPF is very expensive here, about $1.00 / board foot.

03-11-17, 10:13 AM	#4
buffalobillpatrick Master EcoRenovator Join Date: Mar 2014 Location: Florissant, Colorado Posts: 599 Thanks: 814 Thanked 59 Times in 55 Posts	I bought a small HRV, about 75% efficiency. Fantech FLEX 100H Heat Recovery Ventilator (HRV) CFM, 0.4 W.C., 50-106 CFM It will suck stale humid air from master bathroom & return fresh air into great room. The 3 toilet rooms will all have: Panasonic FV-11VQ5 WhisperCeiling 110 CFM Ceiling Mounted Fan, White The makeup air will mostly be drawn in through the HRV, I hope. Upon running the Builditsolar Home Heat Loss Calculator, air infiltration will most likely be my biggest heat loss. Heating season is about 7 months. No A/C needed. So I will try very hard to air seal as best I can. The suspect areas are the upstairs framed gable ends, all doors & windows. I have a high volume lab hood type air pump. What is a good strategy for finding air leaks, smoke? in cold weather use IR gun? The spray foam company has agreed to totally cover the top plate areas where the trusses sit on the concrete walls. BTW, closed cell SPF is very expensive here, about $1.00 / board foot.