MHU400 Big Maxx Heater 400K BTU Natural Gas

MHU400NG is a Mr. Heater Big Maxx™ commercial heater unit with a 400,000 BTU heat input. The MHU400NG is able to easily heat a large 6700 sq. ft. building, and the low-profile design only requires 1 in. of clearance from the ceiling.

While this heater comes from Mr. Heater configured for natural gas, a liquid propane conversion kit is typically included alongside the MHU400.

Easily installs using ³/₈16 threaded rods (sold separately). Check local codes and ordinances for approved installation and usage.

Please refer to the MHU400's user manual for venting and electrical supply requirements.

Features of the MHU400NG Big Maxx Heater

• Spark Ignition - self diagnostic control module
• Ships as Natural Gas (optional propane conversion kit often included)
• Easy external access for thermostat connections
• Compatible with WiFi / Digital Thermostats
• CSA Certified

Specifications of the MHU400NG Big Maxx Heater

• BTU/HR Input Rating: 400,000 BTU
• Motor RPM: 1,560
• Fuel Efficiency Rating: 80%
• Minimum Gas Supply Pressure: 7" W.C.
• Manifold Pressure: 2.13" W.C.
• Gas Supply Connection Size: ³/₄"