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Search: Posts Made By: JRMichler
Forum: Conservation 01-23-19, 05:20 PM
Replies: 575
Views: 1,133,834
Posted By JRMichler
My experience is that about 35 CFM is normally...

My experience is that about 35 CFM is normally enough for a house with two or three people in it. The house is fairly tight at 0.85 ACH50. We run the HRV at a higher speed for a couple days when...
Forum: Conservation 03-24-17, 04:22 PM
Replies: 575
Views: 1,133,834
Posted By JRMichler
Google rotating heat exchanger. Rotating heat...

Google rotating heat exchanger. Rotating heat exchangers have very high efficiency and no actuators or dampers.

I don't know if frost in cold temperatures (-35 deg C) would be a problem,...
Forum: Conservation 05-13-13, 07:19 PM
Replies: 575
Views: 1,133,834
Posted By JRMichler
If a surface, any surface, has a temperature...

If a surface, any surface, has a temperature below the dew point of the air around that surface, there will be condensation on that surface. It does not matter if the surface is concrete, wood, or a...
Forum: Conservation 05-11-13, 03:51 PM
Replies: 575
Views: 1,133,834
Posted By JRMichler
Ventilation will keep indoor humidity down if the...

Ventilation will keep indoor humidity down if the outdoor dew point temperature is at least 20 deg F lower than the inside temperature. For example, the outdoor dewpoint right now is 58 deg F at the...
Forum: Conservation 01-10-13, 08:31 PM
Replies: 575
Views: 1,133,834
Posted By JRMichler
Combustion efficiency starts with the heating...

Combustion efficiency starts with the heating value of the fuel. Any fuel has two different heating values: Higher Heating Value (HHV) and Lower Heating Value (LHV).

The LHV is measured by...
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