We use the Webasto Air Top 2000. This is from the product manual:

Here's the link to the product manual:
http://www.techwebasto.com/heater_ma...hop/776891.pdf

The unit has a control knob, which looks like a rotary temp knob on a dash. Also, it has an internal temperature limiter built into it. The internal unit senses the incoming air temp and regulates through it. So, the best way to install it would be to have a return air duct hooked up, as well as the heated air outlet duct. They install ours into the sideboxes without a return duct, so it's essentialy sensing the air temp of the air inside the sidebox, not the air temp of the cabin. With the external sensor added (which is a tiny thing, about the same size as a temp sensor for one of the cheap outside thermometers you can grab at any truckstop). Then it'll use that for sensing the temp instead of the internal sensor.

Hope that makes sense ;-)

I know it'd be easier to use the external sensor. The reason being that if you put the return air duct close to the floor, it will be sensing the temperature there, not high up in the sleeper. Remember, hot air rises. So, you'd end up with the bunk being comfortable, but as soon as you stand up, you'd be going into the hotter air.

 

I hope the Espar has something similar because I just bought one of those on ebay a few minutes ago. I really hope the Espar has something similar, thermostatic control is just 100x better than moving a switch up and down and up and down and, well, up and down and...

 

That's what mine has, but that wasn't what I was complaining about initially. I wish it had a control panel that I could set it to a specific numeric temperature, like a home thermostat. I remember Oldsmobile came out with a car in the late 80's (i think) that had an actual numeric thermostat in it. If you wanted it to be 72 degrees in the car, you set it to 72. I can't believe that manufacturers of trucks and cars still use red and blue colored lines for indicating where the temperature is set at.

 

Gotcha Rev. I had an 80-something Oldsmobile Toronado that had the electronic climate control. That thing was the absolute KING!!! You put in your temp and never touch the thing again. It'd turn on the heat or a/c as needed, it'd move the vents automatically (including switching to defrost as soon as you turned on the wipers). I want that in a truck.

 

EXACTLY. There is no reason that a truck manufacturer can't develop a more sophisticated climate control than what is currently available - both for the cab and the sleeper. We are using 1960's technology in 21st century vehicles. It is pathetic.

 

The '05 Volvo I ran for a few months was labeled has having "climate control". Sorry, setting the temp doesn't qualify for that. Hell, it didn't even turn the a/c on by itself.

But, I'd love to have that system from the '05 in the '02 I'm in. The slide-levers are crap in this thing - the temp lever only has a range of about 70% and if you move the thing 1/64th of an inch you go from way too cold to way too hot.

 

Atleast my Pete has a setting for dual heater/defrost,in my W900 my damn feet would freeze if it was snowing and I needed some defroster.

 

Ya, isn't that just lovely - having to choose one or the other.

 

That aint no lie!

As much as trucks cost now days, you'd think they would use some of this technology.

 

Not anymore! I wish i did it earlier...