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Old 08-07-2010, 08:01 PM   #1
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Heater venting question


I'm installing a dayton propane heater in an a frame cottage. The installation instructions require the exhaust pipe to rise above the roof peak. Heater is located near an outside wall (the lowest point of the A frame). If I were to run the pipe straight up, it would have to stick up 20 ft in the air. Pipe is metal 4 inch double walled metal exhaust pipe. Is it safe to run the exhaust pipe diagonally through open space - strapped to the diagonal a-frame ceiling, but not touching it, then penetrate the roof near the ridge?
This would require two 45 degree turns.

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Old 08-07-2010, 08:43 PM   #2
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Heater venting question


As long as you have 1/4" per foot slope upward it is.

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Old 08-09-2010, 03:13 PM   #3
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Heater venting question


How many inches does double wall (Type B) chimney flue have to clear from combustible materials (studs, sheetrock) when venting a gas heater?
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Old 08-09-2010, 04:42 PM   #4
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Generally 1 ". Varies with application.

Also need a thimble when penetrating walls.
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