Mr. Heater Big Buddy MH18B 4,000BTU-18,000BTU Portable Radiant Heater

The Mr. Heater Big Buddy MH18B delivers powerful, dependable heat wherever you need it. Designed for both indoor and outdoor environments, it offers variable heat output from 4,000 BTU up to 18,000 BTU — capable of warming spaces up to 450 sq ft. Its dual ceramic burner tiles, built-in safety systems, and rugged construction make it one of the most trusted portable propane heaters in North America.

Ideal for workshops, cabins, garages, camping, RVs, or emergency home heating — the Big Buddy keeps you comfortable in even the coldest conditions.

Features

• Adjustable heat output: 4,000 / 9,000 / 18,000 BTU

• Heats up to approximately 450 sq ft

• Clean-burning, efficient radiant heat

• Safe for both indoor and outdoor use

• Dual propane cylinder design (fits two 1 lb tanks or one 20 lb tank with optional hose)

• Automatic low-oxygen shut-off (ODS)

• Tip-over safety switch

• Easy-start piezo ignition with single control knob

• Integrated fan for heat circulation (operates on 4 D batteries or AC adapter)

• Fold-down handle for compact storage and transport

Specifications

Perfect For:
Workshops | Garages | Cabins | Camping | RV Trips | Emergency Backup Heat