Mr. Heater HERO 35,000 BTU Cordless Forced Air Heater

This heater generates the output to heat up to 400 square feet for up to 120 hours on a bulk cylinder. Dimensions: 17-1/2"H x 17"W x 10"D.

This lightweight, portable heater packs into even the most remote hunting, fishing and camping areas. New, easy-to-use piezoelectric spark igniter. Dimensions: 15"H x 13.4"W x 7.7"D.

The first and only cordless forced-air heater on the market, it heats spaces up to 800-sq.-ft., or a two car garage, with 35,000 BTUs of warmth-blasting power. 
Dimensions: 17"L x 9-1/2"W x 12-3/4"L.
Weight: 14 lbs.