[graydog]

TurboS10 said:
"I realize you have to be careful, but I have sprayed with an open flame heater in the same building....and I didn't die"

Give it a chance, you may yet. I didn't fall off a 12 foot roof for the first 75 years of my life.......but I did 28 days ago and it hurt. I am slowly recovering, thank you. As for the unvented propane heater, turn it off when spraying. This from an old natural gas co. employee and retired Firefighter who has seen may unnecessary injuries and deaths. Even my "accident" could have been avoided.

[Old Fool]

I installed a used f/a natural gas furnace I purchased from A&M heating . I added a small furnace room (4'x4') on the exterior of the garage.

(if you do not have NG, then convert the burner to LP and set up a 100 gallon tank.)

It is installed as a 100% loss system, there is no cold air return from the heated area. I did it this way so I could keep positive pressure in the room. I exhaust the air through a filtered man door opening.

I have considered putting a return duct between the furnace room and the garage for just heating in cold weather. I would put a sealed door on this opening so I could close it for painting.

$100 for the furnace
A friend in the industry supplied the duct work.
$200 for the furnace room materials.







I hope this might give someone an idea how to heat their garage/shop/spray booth cheaply. (well as cheap as energy costs these days )

[matts37chev]

Originally Posted by Old Fool

I added a small furnace room (4'x4') on the exterior of the garage.

It is installed as a 100% loss system, there is no cold air return from the heated area. I did it this way so I could keep positive pressure in the room. I exhaust the air through a filtered man door opening.

I have considered putting a return duct between the furnace room and the garage for just heating in cold weather. I would put a sealed door on this opening so I could close it for painting.

I hope this might give someone an idea how to heat their garage/shop/spray booth cheaply. (well as cheap as energy costs these days )

this sounds like a nice set up

Originally Posted by Old Fool

I have considered putting a return duct between the furnace room and the garage for just heating in cold weather. I would put a sealed door on this opening so I could close it for painting

sounds like a very good $$$ saving plan

[dinger]

Originally Posted by Old Fool

I installed a used f/a natural gas furnace I purchased from A&M heating . I added a small furnace room (4'x4') on the exterior of the garage.

(if you do not have NG, then convert the burner to LP and set up a 100 gallon tank.)

It is installed as a 100% loss system, there is no cold air return from the heated area. I did it this way so I could keep positive pressure in the room. I exhaust the air through a filtered man door opening.

I have considered putting a return duct between the furnace room and the garage for just heating in cold weather. I would put a sealed door on this opening so I could close it for painting.

Best one yet! I like keeping furnaces and compressors away from my work area when possible.

[Old Fool]

I should have mentioned I installed this setup for painting.
The rest of the time the garage is heated by a 40k btu NG unit heater with thermostat set at 45f unless I am working out there.

The unit heater can be seen in the photo with the duct work, it is to the right side of the duct work.

[stefanP]

I borrowed a 13'000 btu oil fired/hot air furnace from a building that was being torn down .That was 12yrs ago .But anyway this is what I use.It's nice because when it's cold(northeast) I set the thermostat for 50 degree's' .Garage stays nice and warm.I put iol in the tank when I fill my house.Nicest thing is when I want to work on a project I just turn up the thermostat to 60degree's and with in 10min I in a tee shirt.My garage is 24'x30' with 10' ceilings.6" walls insulated and sheeted.So it also depends how good you insulation is.Thats what I have to offer. Stay warm,
stefanP