I just bought one of these
HI, I just bought a Wave 3 for my van and used it when I went camping early November to Door County, WI. It was crazy cold and this was the first time I used it. Once I hooked it up correctly, it started easily and as long as the van is vented properly, it was very safe because there is no actual flame; it's radiant heat. I had it set up on my step stool and it lasted all night on low. The only problem is that the Wave used a lot of propane and my little 1#ers only lasted a few hours and ran out in the morning. The first night was in the teens and the next morning I had to turn on the van and run the heater to take the chill out. The Wave 3 is probably not powerful enough to heat the entire van on low, but I kept it near the foot of my cot and was OK. I plan to upgrade to a refillable tank about 2.5 gal that I think will last longer.