Using interior “bath” fans to send warm air to other rooms?
The house we are designing is a single story rectangle – 28′ x 48′, that will be pretty tight and a bit better insulated than code. Estimated Manual J is around 14,000 BTU. We are in zone 4a in Virginia.
Half of the house is one large open room. The other half has 2 bedrooms, 2 baths, and a utility room. We plan to have the main source of heat in the large open room.
We are interested in using a couple of Panasonic bathroom fans to send warm air from the main room to each bedroom, using 6″ metal ducts going straight about 15 feet (within the building envelope).
The fans have adjustable speeds, and at the highest speed of 150 cfm they could change over the air in each bedroom in just 7 minutes (which might be too much). Seems like that could do a fairly decent job of evening out the heat between the main room and the bedrooms. I don’t care if the bedrooms are a few degrees cooler, though.
The bathrooms and utility room can have small baseboard heaters, if needed, though open doors should provide much of their heat.
Does this sound feasible? Anyone else use something similar to good effect?
Should I get a professional to run the numbers and confirm the duct design, to see if I can get this approved by the building inspector? Otherwise, I’ll have to install baseboard heaters with programmable thermostats in both bedrooms, too. Thanks!
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