Diesel heater

Hi,

I am checking out some diesel heaters, as I am going to start road tripping to some temperatures as low at 15 degrees. I am not the most familiar with how they are assembled but want to ask for a recommendation on one with minimal assembly. One as easy as just plugging it in and then running the hose in my tent.

Sorry if this is a stupid question but I’m looking at photos on Amazon and unsure if the ones I’m looking at are that way lol.

I also have a buddy heater but hesitant to use it when it is that cold in my RTT due to condensation. I also may wanna run the heater all night for a good sleep which is why I’m want to do the switch. But, lmk if that is also unsafe with diesel heaters.

Thanks