Mr. Heater 125,000 BTU Big Maxx Natural Gas Unit Heater with NG to LP Conversion Kit

Description

The Mr. Heater Big Maxx 125,000 BTU Natural Gas Unit Heater delivers powerful forced-air heating for garages, barns and workshops, turning cold spaces into year-round productive environments. This ceiling-mounted system uses a high-velocity electric fan that draws cool air across the heat exchanger and circulates warm air throughout spaces up to 5,000 sq. ft. The low-profile design requires a 10-foot minimum ceiling height and 8-foot clearance from heater base to floor. Safety features include high-temperature shutdown, gas safety shutoff flame sensor, and electric spark ignition with self-diagnostic control for reliable performance. The unit is configured for natural gas with an included LP conversion kit and supports vertical and horizontal venting to fit diverse building needs.

Features

• Powerful 125,000 BTU output heats up to 5,000 sq. ft
• High-velocity forced air for efficient heat distribution Compatible with standard 24-volt and Wi-Fi thermostats (sold separately)
• Safety system with flame sensor and self-diagnostic controls
• Dual-fuel with included natural gas to LP conversion kit
• Low-profile design requires minimum 10 ft. ceiling height
• Versatile venting for horizontal or vertical installation
• Electric spark ignition for reliable startup in cold conditions