Main vents +heat loss

jim_72

Question I have Two mains of 2" pipe. One is 32' long the other is 25'. Both have single gorton #2 at their ends.The longer main reduces to 1 1/2 " dia the last 4'.At the end of this main is only a 1/2" reducer that elbows up with a 1/2" by 6" nipple to the 3/4" gorton, the gorton being the female.Is this enough venting? Also can you guys tell me what the EDR loss is on these uninsulated mains ,we use them for heat in the basement(very warm)? Any help would be greatly appreciated. Thanks Jack

jim_72

Main vents +heat loss

Question I have Two mains of 2" pipe. One is 32' long the other is 25'. Both have single gorton #2 at their ends.The longer main reduces to 1 1/2 " dia the last 4'.At the end of this main is only a 1/2" reducer that elbows up with a 1/2" by 6" nipple to the 3/4" gorton, the gorton being the female.Is this enough venting? Also can you guys tell me what the EDR loss is on these uninsulated mains ,we use them for heat in the basement(very warm)? Any help would be greatly appreciated. Thanks Jack

Lurker_2

heat loss

The venting sounds fine.

I'd estimate the heat loss on the pipes is in the ballpark of 210-220 BTU/h per linear foot, or around 0.9 EDR/foot. This is in spite of the fact that a linear foot of 2" pipe is actually more like half a square foot in surface area, but I think that's not really important.

-Michael

jim_72

Main vents +heat loss

Then 57' times 220 BTU= 12540btu . 57'TIMES .90=51SQ FT. Question ,is there slippage factored into the .90 figure or do I multiply the 51 sq ft by let's say 1.33 or 1.50 to get a more accurate sq ft and btu loss. Thanks Jim