Blower without a furnace?

[michael7s]

In a small cabin, I'd like to scavenge warm air from the peak of a cathedral-ceiling living room and blow it into two tiny bedrooms.

I imagine a auxiliary blower motor mounted in the attic (over the rooms) that is triggered by the same thermostat that drives the wall furnace in the heated living room (see image below). I'll have a vent installed at the peak of the ceiling/wall and ducting above the two small rooms.

Are there flaws in this approach, and can you point to manufacturers of such a blower motor?

Perhaps a two stage motor that can be controlled by a smart thermostat?

Thanks.

http://www.toptoytips.com/in/furnace.png

[second opinion]

In a small cabin, I'd like to scavenge warm air from the peak of a cathedral-ceiling living room and blow it into two tiny bedrooms.

I imagine a auxiliary blower motor mounted in the attic (over the rooms) that is triggered by the same thermostat that drives the wall furnace in the heated living room (see image below). I'll have a vent installed at the peak of the ceiling/wall and ducting above the two small rooms.

Are there flaws in this approach, and can you point to manufacturers of such a blower motor?

Perhaps a two stage motor that can be controlled by a smart thermostat?

Thanks.

http://www.toptoytips.com/in/furnace.png

Should not be hard to do, look for an exhaust fan like QT300 with a 24 volt relay wired to furnace

[SBKold]

You need another air passage from the bedroom back to main room.

[beb]

Do we know that the wall furnace is 24v or millivolt???

[jpsmith1cm]

Coolwhip,


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[motoguy128]

A lot of inline axial exhaust fans are fairly inexpensive and energy efficient.

The negative to your plan, is that it's going to accelerate the convention currents and may increase cold air infiltration from outside at ground level in the main room.


I'd use a line voltage thermostat in the bedrooms and run the circulation fan independant of the wall furnace.

[michael7s]

Do we know that the wall furnace is 24v or millivolt???

Beb - Wall furnace isn't installed yet. I can order either one.

[michael7s]

A lot of inline axial exhaust fans are fairly inexpensive and energy efficient.

The negative to your plan, is that it's going to accelerate the convention currents and may increase cold air infiltration from outside at ground level in the main room.


I'd use a line voltage thermostat in the bedrooms and run the circulation fan independant of the wall furnace.


Motoguy - thanks for advice about the cold air infiltration.

I like the idea of separate thermostats. Do you see these controlling in-duct fans, doors, or just the main blower?

[motoguy128]

I was just saying it's something that cold be done. You won't see anyting like what you're proposing very often if ever.

A better design is to either install a proper HVAC system, heaters in every room, or use an open floor plan and no cathedral ceiling.

BTW, Is that wall furnace vented? OR a ventless propane unit? I think unvented heating appliances are a very, very bad idea.

Another solution would be to replace the wall furnace with a wood or gas direct vent firepalce with a remote heating kit ( a duct to supply air remotely to another room)