Cold air convection system



Forced cold-air convection heating system




Inside a building with a radiant heat source,  convection is all-important. 

Hot air loses much of its heat when it is forced through ducts.

Cold, stale air sinks to the bottom of a building like water sinks to the bottom of a container.  To heat/freshen a room, it is much more effective to drain/evacuate the sunken cold air from that room than to impel desirable (hot/fresh) air.  Draining undesirable air pulls desirable air from adjacent rooms into the room being drained.




Start with a radiant heat source like a wood stove

Connect coldest area(s) of house to hottest with 2 plastic pipe

Install thermostatically-controlled fan(s) at the end(s) of the pipe(s) in cold area(s)

Push coldest air into hottest area(s).   Cold incoming air will mix with the hot air and make warm air. 

Distance k should be as great as possible while still creating mild turbulence in the hottest area(s). 



Wood stove or other radiant heat source.

Tight envelope.  Random cold (outside) air entry points must be sealed for convection to be effective. 



Huge savings in cost over forced hot air systems.  1/5 the cost of installation, 1/3 the cost of operation. 

Zone control.  Remote rooms can be left alone, or each can have its own drain.

Can be installed easily into existing buildings. 

Fan can be installed at either end of 2 pipe, (but cold end is most efficient).