Velit Diesel Air Heater 14,000 BTU 4,000W 12V

I recently installed the Velit Diesel Heater in my Sprinter Van conversion, and I couldn't be happier with my decision. The unit itself is incredibly powerful and heats up the van quickly and efficiently. What truly impressed me was the value proposition. The heater is surprisingly affordable, considering its performance and the included components. The kit comes with everything you need, including the fuel tap assembly, which was well-designed and included all the necessary fittings. The mobile app is a fantastic addition, allowing me to control the heater remotely (within Bluetooth range) and schedule heating cycles in advance. This is incredibly convenient, especially when I'm preparing for overnight stays or want to ensure the van is warm when I want it to be. The built-in CO2 detector is an excellent safety feature that provides peace of mind. Overall, I highly recommend the Velit Diesel Heater to anyone looking for a reliable and affordable heating solution for their van, RV, or other off-grid applications.

GAS Heater installed less than 2 weeks ago, at 4000ft elevation. Has been running on thermostat at 60f for about a week. Started erroring out with 002 code and then switched to 001 with lots of smoke when it tried to start. Checked fuel lines and angles of everything, small bubbles but fuel is definitely moving. Noticed a LOT of carbon on the ground. Disconnected muffler to see if there was a clog. No clog in exhaust pipe. Customer service has been responsive but indicated that this is a known issue. Their troubleshooting flow chart says to clean the combustion chamber which requires disconnecting intake, exhaust, fuel, replacing a gasket, disassembling unit, cleaning the chamber and reconnecting/assembling everything. It seems that this is a known issue. with the most recent release. My suspicion is that the heater needs to be run on high rather than thermostat to possibly resolve the issues. It's a common rec with diesel heaters to run on high before shutoff. I disconnected the muffler and was able the unit on high, and am working through more troubleshooting. Again this is with a heater that's only been installed for 2 weeks, though has seen lots of runtime. Hoping this can be resolved, I was pretty excited for this heater. Also the device shows up in Bluetooth but isn't connecting to my phone or the app, but I purchased before the Bluetooth was listed as an option.

Working great so far. Just have to make sure it has plenty of power for glow plugs while it starts up. My 15 amp power supply couldn't always keep up. Has kept us warm during our van build this winter. It will run you out quick once it gets going.

Used it a couple of times really works well. I highly recommend it.

Amazing, simply a game changer and CM dectector is great!

Installation of the unit was reasonably easy. Actual use time has been about two weeks. It has not been flawless, but that is partially my fault in playing with it and not realizing I was giving it a nervous breakdown. Need to re-flash the download when I get home, but in the mean time, I simply turn it down to 40 during the day, effectively shutting it off without actually shutting it off. Velit tech support was reasonably quick to answer my email questions, and so far all of their information has been spot on.

When it's working it's great however I've needed to update the firmware several times to get it unstuck from starting up. This seems to happen if the unit loses power. It will just refuse to start.

Got the heater hooked up and working. Shipping time was ok. Instructions were not so great. Thanks to you tube in making the install easier. The heater was easy to prime and get working. My van now has a good heater I’m hoping will last for years.

Ordering, delivery and installation all went great. We have used the heater a few times so far and we are very pleased with the product. We would definitely recommend this to anyone looking to add a heater.

Five star unit and five star service. It is a very well thought out kit, I would buy it again. Thank you!

I’ve been using this velit heater for two years now in our Transit High Roof. It replaced two other common brands that would never start at altitude. We use the heater constantly above 10000 feet at the ski areas. This year it kept us warm on a -27 degree stretch in Fraser Colorado. Great heater. Reliable and always works.

The unit itself seems great, but the included hardware should be better. Should have stainless screws and nylon lock nuts, stainless rubber lined hangers, one more section of exhaust tubing. There should also be an included gasket for the mounting plate to floor surface, not just a gasket for the heater to mounting plate. Lastly the fuel pump is loud, much louder than my friends webasto... For those who are installing, when cutting the stand pipe to length, make sure you have the fuel pump assembly compressed so you get the length correct, you'll know if it isn't because it makes re assembly very hard and probably why many people have a hard time re assembling. use a lock nut and washer on it so it can't work it's way loose. if you are installing under passenger seat, you will be using the mounting plate, so can make a healthy sized hole for the intake exhaust and the bolts attaching the heater to the plate. I installed mine on my transit towards the drivers seat not the passenger side door like most people do. It works but is tight and requires precises pre-bending the exhaust to get by the exhaust heatshield. I used some silicone sealant to create a seal on the mounting plate to the van floor. I routed the exhaust to a space just between the sliding door and passenger door. seems fine for exhaust and not getting sucked into the van. there is also a nice tight space to jam the intake up on the back side of the jack storage area. 1/4 fuel line is perfect size for protecting the included fuel line. I used a section of 3/8 fuel line from the fuel pump to the heater that can also protect the fuel pump wires. I have the fuel pump mounted an untapped m6 or m8 rivnut by the stairwell (get a cheap tapping kit so you can make use of all the untapped rivnuts on the van, also having a rivnut kit makes installing much better), this location makes for a nice pump spot and can keep a steady upward angle to the heater. I installed the fuel filter to the outside of the fiberglass fuel tank cover (wear a mask fiber gets everywhere), it makes a nice union spot so you can reinstall the fuel tank, then be able to connect the fuel line. good luck, takes forever your first go, but bet I could do it in an hour or so now.

Working good

We had some issues with our original unit that was purchased the end of July 2024. Constant ERR01 codes. Velit was very responsive to our plight, as the nights were down to upper 30's. After speaking with their engineer, we determined a new unit was needed. Received the new unit within a couple of weeks, got it switched out and BOOM, fabulous heat and bluetooth capabilities!! Unit is very quiet and starts every time, the first time. Been using it for 3 weeks in 5-35 degree nights and it's keeping the van at 62 (where we have it set). Couldn't be happier and so impressed with Velit's customer service!! Thanks, Velit!

To be fair to the webasto airtop2000st that I replaced with the Velit, I let it sit for a couple years where it was exposed to condensation and the burner assembly rusted and never worked properly. That being said the Velit cranks out more BTUs and is much quieter. The clicking of the fuel pump is maybe 1/4 of what the webasto was and the mounting bracket it comes with is excellent. Once the heater finishes its ignition cycle I barely notice it’s on. The thermostat mine came with isn’t the most elegant, I don’t like how it mounts it’s challenging to hide the wiring. But its functionality is pretty good and way better than the rheostat I had for the webasto. I’m looking forward to seeing what the new Bluetooth thermostat is going to look like and cost.

Living at 8,000 feet we were concerned about the known issues with other brands of heaters at high altitude so were hesitant to drop $1.5k+ on something somewhat unreliable. Recently, a neighbor UNinstalled their Webasco and installed a Velit and has praised its performance since. The install was fairly straightforward thanks to the instructions and was quite DIY friendly if you have basic mechanical skills. It took one cycle to prime then fired right up on the second cycle and churned QUIET heat almost immediately. We used the Ford factory extended tank fuel port and have had no issues. Could not be happier.

I have been extremely happy with the Velit gas and diesel air heaters. The install kits are complete and aside from one ECU failure, which was remedied immediately by Velit, these have worked flawlessly.

After installing, I realized that the fuel pump was defective. Got in contact with their customer service easily and they provided a replacement pump rapidly. Good stuff. Heater works great so far. You need to have decent mechanical skills to install, but that's no different then any other heater of that sort. Will be buying again for my next van conversion.

Finished installing yesterday. Heater works great and controller is basic but gets the job done. Only things I would like to see improved are actual rubber cable instead of taped wires for the harness and a silencer should be included. If it continues to work well it will be a solid deal at this price

Prompt shipment, excellent documentation, and outstanding customer support. Heater came with all the little pieces that you might need. Well thought out.

Install kit was well featured. Instructions were clear. Works well to heat up my van.

We replaced a WebastoAT2000 with the VeLit heater. Because of the heat at lower elevations, the initial run was at 9,000 feet. In short, the VeLit works better—and quieter—at 9,000 feet than the Webasto did at sea level. We look forward to warmth at even higher altitudes. This heater is a game-changer.