You may not want to hear my opinion but roof top tents and wood stoves are rather incompatible.
Here is why.
Rooftent - designed to be portable, quick and easy to use. The canvas folding types of tents are designed for Africa, most are designed in South Africa, doesn't get too cold there. Cold weather requires a European style of roof tent. A Maggiolina is a perfect example, insulated and designed like a mountaineering tent. Two people inside will heat one up about 10 to 20 degrees. We used to have a heated blanket that we would plug in when we were traveling with a similar tent to a Maggiolina, heats the tent and dries it out when you are driving. Open it up, crawl inside a toasty dry little sleeping space.
Wood Stoves - Excellent for canvas tents, stationary and lots of room inside. There is nothing better than an old canvas wall tent with a wood stove. I can understand why you want to replicate it but the new folding roof tents are mostly synthetic or synthetic mix so could be quite flammable.
Your roof tent is something of a hybrid, personally I'm biased and never cared for the the design. It is heavy bulky and slow to set up and take down, difficult to heat and not insulated.
Since you do have the tent and it sounds like it works for you, I do have a thought. Heating a roof tent is tricky because you want to have the combustion outside, like a forced air heater. The Eberspatcher and Propex heaters are simply that, very sophisticated small forced air heaters. This is a lot of hardware to be carrying around. Remember my concept of a roof tent is simple, quick and light. Zodi, made a very simple little tent heater called a "hot vent". They were great for what they were, a very simple forced air heater. The problem is they are a little crude because they are so simple, i.e. you could burn yourself. I'd look in eBay for an old one until Zodi completes their redesign.
