Diesel fired coolant heater Hydronic D5WSC Water Heater Non plug-in preheater.

[teoman]

0.11 galons per hour PLUS electricity for the pump seems excessive to me. My car consumes 0.8L per hour when it is idling (0.2 gal) and it produces its own electricity, keeps battery charged etc...

Never switching the car off would make about 10L per day.

Something like this to heat the car and charge a lot of batteries would be a better option in my opinion.
https://www.aliexpress.com/item/Dies...0-308ec9f8615f

[gumby79]

I looked at the air heater types . But cab heat is secondary to being able to start.
This is a Hydronic heater . AKA boiler set for no steam production. The 200°c reported ehxsost gas temperature im planning to use as well
My loacal Snap-On truck has the air type to keep the tool room warm . I was not impressed with the output. 20° above ambant with the truck heater (engine running) assisting (on full blast.). Driver said it bearly holds 40° f.
Last night @-10°f parked for 2hrs it took 10mi to achieve 140coolent
IAT 2 above , turned on key 5° (heat rising off grid heater) fire now its showing -1 max was 40° f pulling a 1 mi grede average was 28-32° on interstate in town 10-30°.

[gumby79]

.0374ga 10-20 wh of battery for a theoretical 15 min each time i start my truck Vs 750w block heater 24/7 or burn .5 ga per hr 12gal a day. to idle for months.. + no idle laws ..

An air cooled12 hp diesel $1200 ($300 +$900 shiping)Now if it will start and proform at -40° f/c add a genset head a diesel with no load is a cold diesel
An apu ( auxiliary power unit) for Over the road trucks is a better idea imho heat, cool, power and the ability to sleep(air cooled diesels are very loud)

[gumby79]

Went to set up a test . 5 gallons of water ~34°f and was going to time the heat transfer and fule consumption. But the included "$200"doseing fule pump was not sent. So instead of running the device I disassembled it to function test each component separately.
It was listed as "Brand New" . Rust stains, diesel soot, and a locked up water pump (was easily freed as a single component,but would likely have burned out if left alone) indicate a miss leading listing.

Forced air fan checked out
Limit switches checked out
The glow plug was able to exceed 500 °f (the high limit of my IR temperature gun) in 30sec on a 12vdc1200ma wall wort power supply.
Called the Manufacturer and they said the way the wiring harness was setup, "the on-bord controller is most likely fryed". They have the diagnostic wire jumped to ground.
And that this particular unit is a military specific unit with classified parts listing. (read some parts not available to joe public)
Waiting on a response from the seller.
Most likely the system will be returned.
I've seen other 12vdc heaters listed for less $