My Propex Heater installation

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My Propex Heater installation

Postby tony.latham » Tue Sep 24, 2019 10:15 am

Let me preface this by staying that heat isn't needed in a teardrop unless you're camping on the shoulder seasons.

But I thought I'd share this. These little British made heaters are great (but spendy). They burn about 1/3 pound of propane per running hour.

The model I chose was the HS2000. They are only 18" long, 9" deep and 4 3/4" tall. They do need an inch of clearance on the top and sides. The 1" intake and exhaust pipes for the combustion chamber exit from the bottom.

Image

I designed in enough room for mine behind the cooler. In the upper photo, the hot air inlet is on the left and the cold return is on the right. Keep in mind that the air comes in at about 180ยบ so you really need some space above your bedding inside the cabin.

The propane comes in on the right side. Make sure you have enough room for the elbow fitting down below.

The black heat line is a special low-noise product that significantly reduces the decibel level produced by the heater. It's sold by the U.S. importer, Westy-Ventures. http://www.westyventures.com/propex.html

I had to hunt for the elbows I used for a cleaner installation for the hot and cold airlines. I found a pair of "Eberspaecher Webasto Heater 75mm Car Air Ducting Pipe Elbow Outlet Connectors" on eBay for $8 apiece. They fit nicely into the supplied Propex vent fittings after a little work with a drum sander.

For installation, the heaters come with a full-sized diagram that marks where to drill the combustion exhaust and air hoses which for the

The first problem I had was that they are plumbed for British propane fittings. I found a "Straight Adapter, 1/4 NPT Female x 1/4 BSPT Male" on McMaster Carr to fix this issue. It's their item #1786N128.

The installation requires two 1 3/4" holes to be drilled through the floor. Since my floor is 1 1/4" thick, it almost allows for the hose clamps that hold the intake/exhaust pipes on to nest in the holes. I solved this problem by joining two small (and skinny) hose clamps for each tube. 2" holes would be easier.

But now you've got two large holes in the floor and since the heater sits about 1/2" off the floor these holes are not sealed. I solved this problem with two pieces of .040 aluminum and RTV high-heat silicone.

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Here's the detail:

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Since I installed a Partner stove that needed a high-pressure regulator, I needed two different regulators. One for the Propex (it comes with a two-sage 11" WC regulator) and one for my cookstove.

Here's how I mounted mine next to my 11-pound tank:

Image

I'm lucky enough to have a good friend that's been in the propane installation business for thirty years. Of course, I brought him in on the project. He talked me out of black pipe and into rubber hose. I'm glad he did. It was an easy task to run the 112" hose back to the heater. And of course, he made the hose up for me with 1/4" NPT fittings. I think that cost me $15.

I wired in a cutoff switch for the electrical line to the heater. There's a tiny parasitic draw that could be a problem after a month or two. I think I figured out that it would be about 10 amps per month if it was left hot.

Heat isn't often needed in a teardrop, but when it's icy, it's a good thing. :frightened:

:beer:

Tony
Last edited by tony.latham on Tue Sep 24, 2019 4:41 pm, edited 1 time in total.
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Re: My Propex Heater installation

Postby KTM_Guy » Tue Sep 24, 2019 4:32 pm

What 20# tank is that? It looks small in the picture.

We have a 1 gallon or 5 pound tank now and with the stove and water heater will last 5-7 days. Not sure how long it will last once we throw in needing to run the Propex too. I was thinking of getting an 11# or 2.5 gallon tank just to be on the safe side.

I have a chart that tells me how full the tank is by weight. I keep a fish scale in my camp gear box. This next trip will be the first time using it.

Cylinder in Ounces % remaining Oz of propane
146.2 10% 8.2
154.4 20% 16.8
162.6 30% 24.6
170.8 40% 32.8
179.0 50% 41.0
182.2 60% 49.2
195.4 70% 57.4
203.6 80% 65.6
211.8 90% 73.8
220.0 100% 82.0
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Re: My Propex Heater installation

Postby tony.latham » Tue Sep 24, 2019 4:40 pm

What 20# tank is that? It looks small in the picture.


Oooops. It's an 11# tank. I change it in the post.

https://www.amazon.com/gp/product/B00KOLF1IQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I have a chart that tells me how full the tank is by weight.


I bought an inline gauge I'm going to throw in the tongue box so I can check how the tank is doing from time to time. I wouldn't be surprised to find that we only fill that bottle once a year.

Tony
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Re: My Propex Heater installation

Postby MtnDon » Tue Sep 24, 2019 5:01 pm

Those are great heaters. We had one in a VW Westfalia.
Looks good.
Our 6x12 deep vee nose cargo trailer camper conversion... viewtopic.php?f=42&t=58336

We have a small off grid cabin we built ourselves in the NM mountains; small PV solar system; 624 watts PV, Outback CC & inverter/charger ... http://countryplans.com/smf/index.php?topic=2335.0
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Re: My Propex Heater installation

Postby Tom&Shelly » Tue Sep 24, 2019 6:49 pm

tony.latham wrote:The black heat line is a special low-noise product that significantly reduces the decibel level produced by the heater. It's sold by the U.S. importer, Westy-Ventures. http://www.westyventures.com/propex.html

Tony


If any you blokes know where I can get this in 80 mm, I'll drop a few quid and adapt it to my Climateright.

Tom
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Re: My Propex Heater installation

Postby Atomic77 » Tue Sep 24, 2019 7:21 pm

I really wanted one of these but went with the Diesel heater instead. No more than I need it I couldn't justify the cost. It chugs along good on K1. Your installation looks great, as expected from you! Nice work Tony

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Re: My Propex Heater installation

Postby tony.latham » Tue Sep 24, 2019 7:27 pm

Atomic77 wrote:I really wanted one of these but went with the Diesel heater instead. No more than I need it I couldn't justify the cost. It chugs along good on K1. Your installation looks great, as expected from you! Nice work Tony

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This was new in the box for a significant savings from a private party. But I was going to bight and pay retail.

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