adding a furnace

[rjones]

Im adding a 100,000 btu furnace to my detached garage... . I have 60 feet of pipe to run I was going to run 40ft of 3/4" black pipe the rest 1/2... ... . my problem is the secondary regulator{im using propane btw tapping off my tank with a tee} has a 1/4 pipe inlet and a 3/8 npt outlet and a 140,000 btu rating any ideas if this regulator will work with this pipe or am I running too large of black pipe??please help

 

[Bill Stockard]

I have a 100,000 BTU propane fueled unit heater in my shop. I use a two stage propane system. At the propane tank I have a primary regulator that drops the pressure to 10 PSI and is connected to a secondary regulator about 30' feet away with 3/8" copper pipe buried underground. At the building and just above the ground, the copper pipe changes to 1/2" steel black pipe where the secondary regulator reduces the pressure to 11" water column. The 1/2" steel black pipe continues inside the building and up the wall to the heater.



The two stage system was designed and the regulators were furnished by my local propane dealer. I've been using this system to heat a 40' X 50' X 16' insulated steel building without a problem for 16 years.



Bill

 

[Larry Willard]

Your pipe sizing is OK. 1/2 inch is good for 103000 BTU's at 60 feet. (Per a 20 year old code book). As far as connecting the regulator, stub the 3/4 through the wall and use a 3/4 x 3/8 reducer to connect the regulator.

Larry

 

[rjones]

Furnace is in all worked out great... . thx for the replies

 

[mazdarotary]

This is an interesting topic for me at this time. I just recently moved to a new home(new to us atleast),and it has a two car detached garage that I have been slowly turning into a hobby garage. It is a bit smaller than I would have liked from the beginning,but it is 100% bigger than the one we had at the old house. I have been thinking about heating it after I insulate it,but I really have no idea of what would be the best way to do it. We have oil heat in the house,and a smallish propane tank up against the house for a gaslog fireplace,but I would rather not trench up the yard to run a line out to the garage. Could I just get a small propane furnace that mounts on the ceiling,and get another smallish propane tank just for the garage?I am looking to go pretty cheap with this if I can,but I don't want something that is going to be unsafe. The garage is 24'X30',and is a carriage house style roof with afull storage loft above it. I was thinking of maybe just insulating the roof rafters,and the walls downstairs,and not the ceiling of the garage,so that I could keep evrything including the storage area somewaht warm. I think I will just keep it a reasonable temp all the time maybe 45-50 degrees,and the bump it up when I am out there working. Any help would be appreciated. I am pretty handy being an electrician,and all,but I really know littel about heating systems. Thanks in advance.

 

[rjones]

yes you can when you say smallish Im guessing a 100lb cylinder..... If your going to insulate you would be fine that way You will have frequent trips to the gas company but it will work... ... .

 

[tugboatphil]

Man goes into the store to buy a furnace. The salesman says, "We have this model that produces 20,000 btus. " "And over here is one that produces 40,000 btus. " "And finally there is our largest model that produces 60,000 btus. Which model do you want?"



After looking for a minute, the man replies, "I don't know anything about B-T-Us. All I know is that I need a furnace for myself, my wife and her mother. That's two women whose B-U-Ts are as big as T-U-Bs!"



Sorry. I couldn't help myself.