Thread: Question about combustion air input on a high efficienct furnace.
View Single Post
  #31   Report Post  
Posted to alt.home.repair
 
Posts: n/a
Default Question about combustion air input on a high efficienct furnace.
wrote:

Given a 92% efficient furnace, if 100 cfm of 130 F air leaves the flue...

The gas furnace output would be about 500K Btu/h, enough for 10 houses :-)

Nick

Reply With QuoteReply With Quote