Jimbo
Plumber
I am trying to evaluate a proposal our condo management has from a heating installer for new furnaces, and it is more complicated than I have had to deal with. Any comments?
Currently there is a 3" round B-vent which extends from the water heater closet on the first floor, straight up. On the second floor, the other water heater connects into a 3x4x3 tee. The B-vent continues as 4" straight up thru the roof.
The proposal is to connect a gas furnace, probably not larger than 45,000 btu input rating, into that 4 B. Is that too much? Because that upper section of B would then have roughly 120,000 btu in it.
We have previously disapproved any proposal to put in a furnace requiring thru-the-roof because our roof is SACRED ( read $$$$$) and we don't mess with it! It seems to me this new proposal would require that the roof section be enlarged to 5". Is that correct???
All of the present furnaces are direct vent thru the sidewall, but they are Suburban, which can't be repaired , and we can't find a new one of that type to replace it. ( They are "pancake" style furnaces due to soffit-mount in the first floor.)
Currently there is a 3" round B-vent which extends from the water heater closet on the first floor, straight up. On the second floor, the other water heater connects into a 3x4x3 tee. The B-vent continues as 4" straight up thru the roof.
The proposal is to connect a gas furnace, probably not larger than 45,000 btu input rating, into that 4 B. Is that too much? Because that upper section of B would then have roughly 120,000 btu in it.
We have previously disapproved any proposal to put in a furnace requiring thru-the-roof because our roof is SACRED ( read $$$$$) and we don't mess with it! It seems to me this new proposal would require that the roof section be enlarged to 5". Is that correct???
All of the present furnaces are direct vent thru the sidewall, but they are Suburban, which can't be repaired , and we can't find a new one of that type to replace it. ( They are "pancake" style furnaces due to soffit-mount in the first floor.)