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-   -   Sealing/Insulating Electric Furnace in Garage (http://www.houserepairtalk.com/f8/sealing-insulating-electric-furnace-garage-12215/)

Shawner 09-29-2011 07:14 AM

Sealing/Insulating Electric Furnace in Garage
 
I have an electric forced air furnace, located in my garage. Garage is insulated, but not heated.

http://desmond.imageshack.us/Himg703...jpg&res=medium
http://desmond.imageshack.us/Himg840...jpg&res=medium



The furnace used to have foil faced insulation on it, noticed it was extremely dusty when I bumped into it the other day. Also seems to be pretty dusty inside the house.

http://desmond.imageshack.us/Himg849...jpg&res=medium

Couple questions...

1) Should I seal the joints with the proper foil tape? Or are these joints already airtight?
2) What should I use to replace the insulation on it? There's a gap between the sheet metal and the floor where it used to be stuffed underneath. Can I use rigid polystyrene or will it be too hot?
3) Where the ducting enters the ceiling, can see a bunch of batt insulation sort of sticking out (can sort of see it in the second picture). What would be a good way to seal that off? If I change the oil in a vehicle in the garage, we can smell it upstairs even if the furnace isn't on. Sort of thinking the fumes are travelling through there?


Thanks!

nealtw 09-29-2011 07:47 AM

The code in B.C. now calls for the furnace in the garage to be in a closet with an exterior door. This is an attempt to stop off gasses from the auto from entering the house.

paul52446m 09-29-2011 06:44 PM

Quote:

Originally Posted by Shawner (Post 61537)
I have an electric forced air furnace, located in my garage. Garage is insulated, but not heated.

http://desmond.imageshack.us/Himg703...jpg&res=medium
http://desmond.imageshack.us/Himg840...jpg&res=medium



The furnace used to have foil faced insulation on it, noticed it was extremely dusty when I bumped into it the other day. Also seems to be pretty dusty inside the house.

http://desmond.imageshack.us/Himg849...jpg&res=medium

Couple questions...

1) Should I seal the joints with the proper foil tape? Or are these joints already airtight?
2) What should I use to replace the insulation on it? There's a gap between the sheet metal and the floor where it used to be stuffed underneath. Can I use rigid polystyrene or will it be too hot?
3) Where the ducting enters the ceiling, can see a bunch of batt insulation sort of sticking out (can sort of see it in the second picture). What would be a good way to seal that off? If I change the oil in a vehicle in the garage, we can smell it upstairs even if the furnace isn't on. Sort of thinking the fumes are travelling through there?


Thanks!

I would tape up the joints and build a in closer around the unit, and make it air tight. Screw on panels so you can get into the unit to service it. Paul


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