Questions re: Big Maxx heater installation

[crw41]

I will be installing a Big Maxx 80,000 BTU liquid propane heater in my insulated gararge soon (with the help of a licensed HVAC company).

I want to make sure I have every thing set before I get them out here to do this.

This is what I have (any other suggestions):

1. The unit will hang via four 1/4 threaded rods from the ceiling. We will use 2x4s in the attic nailed to the joyces which will then drop through the ceiling

2. The Big Maxx unit (comes with 2 brackets only)

3. I have their suggested 24V thermostat

4. Vent kit to the outside

The heating guy will plumb some 1/4 piping from the unit to the outside.

There will then be a connection from the 1/4 pipe to the propane tank via a hose.

I have the tank, regulator, gaugae, and flexible connection to hook to the 1/4 pipe ready to go.

Any other suggestions?

 

[Cowboy69]

Im here in ontario and I just put in a 50,000 BTU unit and they told me I needed 1/2 inch propane line and I had to use 3/8 threaded rod. But I have been told different things by different people too. I can tell you that they are a nice unit and work very well. My friends have had them in their shops for quite some time now and love them.

 

[4wllr]

Im here in on yestario and I just put in a 50,000 BTU unit and they told me I needed 1/2 inch propane line and I had to use 3/8 threaded rod. But I have been told different things by different people too. I can tell you that they are a nice unit and work very well. My friends have had them in their shops for quite some time now and love them.

3/8 threaded rod.is correct

 

[ForceFed70]

Yes, 3/8 threaded rod is what should be used.

Liquid propane tho? I don't think that's allowed. The heater certainly can't take that kind of pressure, so I am assuming that you plan to have a regulator installed just prior to the unit? Those regulators must be vented outside I believe. Overall, the liquid propane idea is a poor idea IMO. I strongly suggest you run 11-13"WC like the rest of the world, or perhaps a 2PSI system.. but certainly not tank pressure.

 

[Chetter]

You will love having a heated garage, I keep mine at about 55* using an old Honeywell round t-stat that I took out of house when I switched to digital in the house. I use 2-40lb propane bottles with a regulator that was geared towards Mr Heater heaters and it is an auto switching unit that switches from the empty bottle to the full one. I tried a different regulator to begin with but it worked only when it wanted to, so this unit works great. I ran 1/2" black pipe from the heater through the wall to the regulator and the regulator has the 2 flexlines from the regulator to the tanks. My tanks are covered to keep the weather off them and the regulator. The first regulator was made in China and this new one was made in Italy, and is a real nice unit, there is a definate difference in quality both in machining and parts used. I have been heating my garage for 3 years now and it is great. Good luck with your install..

 

[dave67fd]

As others said, don't use the 1/4-20 rod, too small use 3/8. The 1/4" gas line is way too small as well. 1/2 or 3/4" black iron should be installed but is dependent on length. Consider design size if you plan to tap off for other future uses as well.

If a HVAC company is installing they should know better. Make sure you hang the heater so it is facing the coldest in coming air area (i.e. facing garage doors.) Also position so the venting meets code requirements. Something the HVAC company should also know.