[Stoves] moving warm air

[Kevin]

Dear John

A lot depends on the heater output, and the heat loss in the adjacent room.

You can calculate the heat you can move with such a fan, as follows:
Q = 1.08 x cfm x (Th -Tc)

Q = heat in the air, BTU/Hour
cfm = fan delivery volume, in cubic feet per minute
Th = Temperature in Degrees F, at the ceiling of the heated room
Tc = Temperature of the cold air returning from the cold room through the door to the hot room, Degrees F

Before you start boring holes in the wall, get a length of 4" diameter clothes dryer ducting and a computer fan of the size you are considering. Mount the fan in the doorway, and use a short length of the clothes dryer duct to deliver "ceiling air" down to the computer fan, for discharge to the cool room. 

You could also get a "Summertime Cooling Fan", about 10" diameter, mount it close to the ceiling of the hot room, blowing downward, to "a home made cardboard ducting elbow" discharging above the door, into the cool room. 

Another possibility is to use such a fan to blow cool floor air from the cool room into the warm room, directly toward the overheated stove. This would encourage movement of hot ceiling air through the top of the door, into the cooler room.

The above are "ugly solutions." Tell The Wife that once you get something that works, you will install a pretty solution. :-)

Best wishes,

Kevin
  ----- Original Message ----- 
  From: John Davies 
  To: Discussion of biomass cooking stoves 
  Sent: Friday, June 08, 2012 3:14 PM
  Subject: [Stoves] moving warm air


  I have recently moved house, and have a dilemma. I have an anthracite heater in one room which is uncomfortably warm. I wish to move the warm air into adjacent rooms to have a more even heating of the house. There is an open doorway leading into a passageway, but the air movement is insufficient.

   

  My thoughts are to bore holes through the walls the size of a computer fan and mount such fans in the holes to distribute the warm air.

   

  Would this be successful ?  What wattage fan would move how much air ?  Is the idea viable?

   

  Your thoughts would be welcome.

   

  John Davies,

  Experiencing the first winter chill.



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