I have the HCalory TB. Got it on the recommendations of a couple different friends. Sooo easy to set up. Set it outside the truck, run the air hose to the truck intake port I made, and press “On” on the FOB. That’s it. 3-5 minutes. Hot air in about 3 minutes. Best feature I like, the thermostat FOB. Set it for your desired temp in the camper and forget it. Self adjusts to maintain the temp. I have a V2 MAX. Here is my thread that you can see the intake I put in for the hose. The heater comes with the louvered intake vent I pop in the hole to attach the hose. 2024 Toyota Tundra V2 MAX Build #7889