I like my Buddy Heater, because it doesn't use any power other than propane. I don't like that it's either low, high, or off (no thermostat) and it's high pressure. I like my furnace because it works off the low pressure system in the camper and it provides steady comfortable temperature in the camper. I don't like that it's a battery hog. My dream heater is low pressure that I can connect to my stove connection. About the size and output of my Buddy Heater. It would also have an actual thermostat so I could maintain a constant temperature. I would be happy with radiant or blue flame, pilot or spark ignition as long as it has no fan (optional fan okay). I've found a couple vent-less low pressure LP heaters with thermostats, but they are too large. Back to dreaming until the industry releases one or I retire and come up with it for myself.