kurt Posted May 17, 2006 Report Share Posted May 17, 2006 What's the maximum length for direct vent (PVC) flue pipe? Had one today w/6 heating system's; one of them had flues approx. 33' long going out the wall. Quote Link to comment Share on other sites More sharing options...
Terence McCann Posted May 17, 2006 Report Share Posted May 17, 2006 This may help Kurt. http://www.alpinehomeair.com/related/Go ... ctions.pdf Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted May 17, 2006 Report Share Posted May 17, 2006 "What's the maximum length for direct vent (PVC) flue pipe?" I think that is determined by the manufacturer. I saw one that was 45' that was listed as acceptable. Do you have the pipe diameter, # of elbows, furnace manufacturer and model # ?id="blue"> Quote Link to comment Share on other sites More sharing options...
kurt Posted May 18, 2006 Author Report Share Posted May 18, 2006 Originally posted by inspecthistoric "What's the maximum length for direct vent (PVC) flue pipe?" I think that is determined by the manufacturer. I saw one that was 45' that was listed as acceptable. Do you have the pipe diameter, # of elbows, furnace manufacturer and model # ?id="blue"> I've been to the Lennox site, & couldn't find anything that applied. I know that it varies, and different mfg's. have differing requirements. I just thought maybe someone would have the magic link for a "standard" industry limitation..... Quote Link to comment Share on other sites More sharing options...
kurt Posted May 18, 2006 Author Report Share Posted May 18, 2006 Originally posted by Terence McCann This may help Kurt. http://www.alpinehomeair.com/related/Go ... ctions.pdf Thanks; that's sorta what I was looking for. A general length listing, so to speak... Quote Link to comment Share on other sites More sharing options...
Neal Lewis Posted May 18, 2006 Report Share Posted May 18, 2006 The vent pipe sizing table for the Lennox G26 Cat IV furnace says for a 3" exhaust the maximum lenght is 130 feet, straight run with no elbows. 90 degree elbow is equivalent to 5 feet; 45 is 2 1/2 feet. Quote Link to comment Share on other sites More sharing options...
kurt Posted May 18, 2006 Author Report Share Posted May 18, 2006 Thanks Neal; that's (again) sort of what I was looking for. Just trying to get a general idea of the parameters. Ya know, this little place is starting to be a pretty good reference source; way to go, Mr. O'.... Quote Link to comment Share on other sites More sharing options...
MechAcc Posted June 11, 2006 Report Share Posted June 11, 2006 Originally posted by Neal Lewis The vent pipe sizing table for the Lennox G26 Cat IV furnace says for a 3" exhaust the maximum lenght is 130 feet, straight run with no elbows. 90 degree elbow is equivalent to 5 feet; 45 is 2 1/2 feet. On 90 degree there are short sweep and long sweep elbows. The long sweep is equivalent to 5 feet. The short sweep is 10 foot equivalent. Quote Link to comment Share on other sites More sharing options...
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