Engine block heater question

Diesel Fired Heater Maximizes Heating System Functionality | PTI try these guys

 

Or you might want to check out Webasto heaters like the Thermo Pro 90 https://www.webasto-comfort.com/int/product-overview/product/show/thermo-pro-90-1/
I recently installed one of these in my truck with a Cat C-15, and while it hasn't gotten cold yet, it seems to be able to raise the engine temp about 40 degrees F from ambient in 20 minutes. It was about $2K with enclosure and digital controller/timer.

 

It depends on how you plumb the water. In your original post you were just talking engine heat, but you can route the hot water from the heater through one or both of your heater cores. It has a way to wire in a relay to turn on your heater fans if you wish. They also make products that supply both hot air and water if you want to go that route. The wiring that comes with the kit is long enough to install the control about anywhere you want. There is no labor in that figure as I installed myself. I did spend another $170 having the local welding shop make a bracket for me out of aluminum to mount the enclosure under the sleeper. With these units, the combustion fan and water pump run from the truck batteries, so you have to make sure they are up to it in cold weather. The controller does have a user adjustable setting to shut off the unit before the batteries are too low to start the truck.

 

What i have on 19 of my trucks, and almost every piece of equipment, they work great!

 

The model 90 is in a housing already, so no need to.

I cannot speak to other models of webasto, but would assume they are also.