Hi all,
New to the site, thanks in advance to anyone taking the time to read.
I am a homeowner who is working through a remodel of 1930s cape in new England. I had a licensed HVAC contractor install a carrier 85% gas fired furnace and AC condenser in the attic. The attic has been insulated and finished off as living space. This is in addition to the basement unit which services the main floor.
I have some concerns about the safety of the installation. My goal here is to get a second opinion on if I need to call them back and ask them to address anything. It's possible I am just being overly paranoid.
I can't post pictures yet so I will try to describe the setup for now.
Conditioned space is about 600sqft. The unit is 2 ton, with standard efficiency natural gas furnace and AC. This is a second floor A-frame attic space with 2 bdrm and 1 bath.
The unit was installed in knee wall space, in what used to be a small insulated closet. The closet was demoed and the doors were converted to access panels for the system, which was installed horizontally. A 6" fresh air intake was installed out the roof, 4" combustion exhaust also out the roof.
Because the install location used to be a closet, there is R-19 faced fiberglass which was left in place and is almost touching the firebox. That's was the first red flag, as the facing is flammable. Should this be removed?
The furnace cover, which has the grills for combustion air, is about 3" from the framing that contains the access panel, and about 6" from the access panels themselves which are 3/4" plywood. Two questions here, is this a safe distance from flammable material? and given that the hvac system sits in unconditioned space, I'm thinking those doors should have been insulated to prevent freezing air from entering?
Thanks again for any guidance here.
-Ben
New to the site, thanks in advance to anyone taking the time to read.
I am a homeowner who is working through a remodel of 1930s cape in new England. I had a licensed HVAC contractor install a carrier 85% gas fired furnace and AC condenser in the attic. The attic has been insulated and finished off as living space. This is in addition to the basement unit which services the main floor.
I have some concerns about the safety of the installation. My goal here is to get a second opinion on if I need to call them back and ask them to address anything. It's possible I am just being overly paranoid.
I can't post pictures yet so I will try to describe the setup for now.
Conditioned space is about 600sqft. The unit is 2 ton, with standard efficiency natural gas furnace and AC. This is a second floor A-frame attic space with 2 bdrm and 1 bath.
The unit was installed in knee wall space, in what used to be a small insulated closet. The closet was demoed and the doors were converted to access panels for the system, which was installed horizontally. A 6" fresh air intake was installed out the roof, 4" combustion exhaust also out the roof.
Because the install location used to be a closet, there is R-19 faced fiberglass which was left in place and is almost touching the firebox. That's was the first red flag, as the facing is flammable. Should this be removed?
The furnace cover, which has the grills for combustion air, is about 3" from the framing that contains the access panel, and about 6" from the access panels themselves which are 3/4" plywood. Two questions here, is this a safe distance from flammable material? and given that the hvac system sits in unconditioned space, I'm thinking those doors should have been insulated to prevent freezing air from entering?
Thanks again for any guidance here.
-Ben
source https://hvac-talk.com/vbb/showthread.php?2222283-gas-furnace-in-finished-attic-knee-wall&goto=newpost
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