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@Bergger I’m a fan of the Truma with some reservations. I agree with all he’s said, but here’s a few more pros and some cons to fill out the picture:
Pros:
1) Fairly compact, fairly light and can be mounted in nearly any orientation. The mounting was a big deal for me as it was an add on after the interior was built, and Propex or Webasto just wouldn’t work anywhere else. I did not want the hassles of diesel.
2) Quiet on the night mode, very powerful and quick to heat on the auto mode
3) Very fuel and power efficient
4) The Vario comfort model will definitely keep a poptop warm. Bergger lives in Leadville, CO so he knows!
5) The controller is good and easy to work with, once you get how it works. There’s an internal temperature sensor, that can be positioned where you want it on install, up to a point.
6) Clean burning no odor inside or out. In fact I measured the CO production at the exhaust with a very sensitive CO monitor, and it didn’t get above 25 ppm.
7) The external air intake is integrated in the exhaust duct, which means just one duct, one hole, and the air coming into the combustion chamber is pre-warmed by the exhaust and therefore more energy efficient
8) A number of RV places are dealers
Cons:
1) Can only be dealer installed in the US unless you somehow source one from Europe. Got mine from AT Overland, same as Bergger
2) Quite expensive. And I think inflation and tariffs can’t have helped.
3) Truma sells just about nothing in the US for DIY. I had a really hard time sourcing the interior ducting I wanted to add under the sink in the picture. Couldn’t buy it on line or directly from Truma CS. Not the standard size for diesel heaters, etc (it’s 80mm). Even a Camping World here I talked to couldn’t source it in the US for some reason, and they are an official Truma dealer. Mario at AT took pity on me a sold me a meter.
4) Truma has sort of pulled back in the US. They did have a mobile technician network, but laid them off recently (got this from Truma CS and one of the laid off techs).
5). I personally think the Truma Vario Heat Comfort that I have is overkill in a small rig. We find that sometimes it will cut off and flash an error code saying it’s over temp. The fan mode will kick on very high and noisy to cool it down. It will turn itself back on later. This is a feature, not a bug, and may be related to our not using it in really cold temps (Southwest) and
may be due to where it’s mounted and airflow (hence the added duct). If I did it again, I’d opt for the Truma Vario Eco, which is two speeds, not three and lower BTU’s. IIRC, the Comfort goes up to 11,000 BTUs. But I get why Bergger loves it in the frozen north!
6) Minor, and not a Truma fault per se, but it often won’t start right up when first newly connected to propane (eg, just in camp and reconnecting). It’s due to the stupid new OPD propane valves and the insane German engineering precision. Once you learn the trick it’s generally fine. Ask Bergger or me if you get one and we can tell you how to do it.
7) A niggle, but I don’t understand why the damn controller doesn’t have ambient temperature display. Seems really stupid. It does have an offset you can program to try to match to your internal temps, but you need a separate internal thermometer if you want to know the temp inside. Or, did you find one hidden somewhere
@Bergger?
If you want to take advantage of the pros, and don’t mind the cons (which I don’t think are deal breakers for a really high quality, robust unit) and want to spend the $$$ they are great heaters.
