They do not list the BTU's but it says 1.7 kilowatts.... 

That would be 5.797 BTU's - serious heat.

If it is half that powerful it will heat up your whole Winnebago in an hour.....

AND they say you can cook on it!!!! (see photo)

Basically, this thing and a good supply of Butane and you're good to go all winter long.

(Please follow all ventilation instructions carefully.)

Weighs about 4 pounds (1.8 kg)Fuel gas: butane gas
Model: BDZ-Q1000
Power: 1.7kw

Air consumption: 125g/h
Weight: 1.8kg