Eberspacher Espar Airtronic S2 D2 L 12V 2.2kW 7500BTU with EasyStart PRO 7 Day Timer Fault Diagnostic and Automatic Altitude Adjustment with includes FREE floor mounting plate | LATEST MODEL

UPDATE: 12/29/21 It snowed here in Seattle and temps are getting below 20F at night. So I slept in the van last night to see how well the heater works. I slept in sweatpants and a Tshirt with only a comforter. I set the controller to run for 6 hours with the temp set to 55F. I set the controller to low flow as well. I was plenty warm for sleeping. It used a little over a quart of diesel. I could hear it running but it didn't bother me sleeping.-------------------------------------------There is a lot of information including videos on how to install this in a Sprinter, which for most they put it under the passenger seat. There is no room under the seat in a Metris as that is where Mercedes decided to put the battery. (Truthfully, converting a Metris is a lot different than a Sprinter mainly due to less space). I took some time and research before I decided when and where to drill those holes in the floor.I put bench seats in the back of our Metris. I created a space a little more than a foot deep at the backend of each bench to access through the rear doors. They are literally right behind the wheel wells. Underneath on the drivers side is this space where nothing is installed like brackets, hoses, wires, etc. (In the middle is the spare tire, on the passenger side the van’s muffler.) I spent some time making sure the heater outlets would come out in this space and yet be able to route the heat output hose to the middle of the van. Perfect spot. I have about a foot and a half of exhaust pipe before the muffler and a half foot after the muffler. It's not that loud standing outside next to it, just sounds like soft air blowing through a pipe. The intake I routed up the trim that goes up the side next to the door. It stops right under the taillight. It shouldn't get any water in it and is away from the exhaust.Figuring out the wires was the next difficult part mainly due to lack of information and wires that aren't needed. I routed the EasyStart Pro controller over near the sliding side door to give it a more balanced temperature sensing for the entire van. The EasyStart Pro is what makes this work so well. You can set it up to 720 minutes and a specific temperature. It will monitor the temperature that entire time and turn on the heater whenever it drops. It's been about 36-39 degrees this past week so I set it at 50 degrees (F) when I’m not using it. You can also specify 3 different settings up to 120 minutes each along with a temperature setting for any or all days of the week. I think they should increase the number of settings or at least a longer time for each. But I mainly set those for the night. In fact, one morning I left for a trip and it was nice and warm when I got in.Finally, the Metris is gas powered. I thought about putting a tank inside but when I got some diesel to test run this thing I got some on my hands that smelled for several days. I didn’t want that inside the van! So I needed to add an outside tank for diesel fuel. By the time I decided which aluminum tank I wanted, apparently they are hot for Christmas and I couldn’t get one until next year. It was already cold, so I got a cheap one gallon plastic fuel tank. I protected it with a tin box I hammered out of a scrap piece I had, painted it and attached it to a converted bicycle rack that hooks into the trailer hitch. The tin box protected it really well. I tested it recently on a very bumpy road and spilled not a drop of diesel. I haven’t really lived in it enough to know how much fuel it would actually use to keep us warm but I do know a gallon was enough to keep the van warm at night and some during the day for at least a weekend. My plan is to get a 2 gallon, 6x20, round aluminum tank.A note on size. This is the 2.2kW version. Researching what to get I read the larger ones blasted the heat in these vans a bit too much. Our van is a lot smaller than the Sprinter and while it has a lot of insulation there are a few areas that aren’t finished. This one gets the heat up but I’m not blown away. It’s enough but not toasty warm, short sleeve. For the most part I don’t need that and this works fine, I’ve slept in a three season tent in 20 degree weather. But I don’t know if this size would work well for those who live in them or stay in really cold weather for any length of time.The guys at Eberspacher support are fantastic! I was able to get them by phone but when I can’t I usually get a response to email that day.I will be updating our website with more detailed information on this and other things. Just search for the red metris dot com (no spaces)

I’ve purchased 6 of these heaters and installed them in Sprinter campervans. I was previously purchasing Espar heaters from a distributor in the UK, but their price has increased and I found PW Holdings on Amazon.This is a great heater and the wiring and hardware provided by PW Holdings makes the install very easy, with one exception. The wiring for the thermostat is only about 18” long. This means you must mount the thermostat very close to the heater, which is very inconvenient.They do provide extension wires for the thermostat that is about 12 feet long, however you must wire the connector using Deutsch Weatherpack connectors. It took me about an hour to wire the first one, but I can now do one in about 15 minutes.I have to say it's a real pain in the butt, and I don't understand why PW Holdings doesn't just ship the wiring harness with a long connection for the thermostat.Other than that, I think this is a great heater for the money.

We bought this heater specifically for its high altitude capabilities. We live between 4000 & 6000 feet and this heater RARELY turns on without throwing an H1 Fuel Supply error code and shutting off. We called Espar several times and all they do is tell us how to clear the code. We have been using this heater all winter and have had to disassemble and remove the fuel pump to clear it on multiple occasions. Considering the price point, we expected this heater to work. Sadly it rarely works without a cycle of 5-10 restarts & code clearing and sometimes a complete fuel line disassemble. On our trip to Colorado, the heater would not work in Winter Park or Steamboat (8000-9000 ft elevation). We spent several very cold nights until we were able to get to lower elevation due to this heater not working despite being advised to work at elevation.

Works very well. Is a little noisier than I expected, but still doesn't interfere with my sleep, on a high setting producing comfortable temperature in uninsulated short wheelbase low-roof Sprinter van at near freezing outside temps. I expect it to be much more efficient after the van is insulated. Controller interface logic takes some effort to learn, but afterwards is manageable. Install was not very complicated, although required some time - I just wanted to make sure that everything is done right. Manufacturer installation info that came with the unit is marginally useful, but I found a lot of pertaining information on the web. This updated model seems to be levels easier to wire compared to pre-update models - even as I was initially intimidated by the electrical connections, eventually it turned out to be a no-brainer - no-pain setup was worth every penny over pre-update models, even if those are much cheaper.

I've used the S2D2 in the back of my well insulated 2001 Chevy Astro van in temps as cold as -25F, elevations up to 10,000 feet (Wolf Creek CO), and near many other high elevation resorts. Didn't want to risk trying a cheap alternative in such conditions. 3 years in, and it has been trouble free. On average seems to sip about 3-4 cups of fuel, and consumes 6 amp hours while running 8 hours. Cycles on/idle/off properly. Installation was straight forward - kit came with everything I needed excluding the fuel tank - purchased separately. (I have a separate designated fuel tank for the heater, and run it with a 100AH battery - charged off the alternator). When van dies - hope to move it to my next vehicle.