Mr. Heater 50,000 BTU Natural Gas Unit Heater Bundle with Thermostat
Mr. Heater 50,000 BTU Natural Gas Unit Heater Bundle with Thermostat
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In this review of the Mr. Heater 50,000 BTU Natural Gas Unit Heater Bundle with Thermostat, the bottom line is simple: this is a practical, high-output ceiling heater for larger garages, workshops, and barns that need dependable heat and straightforward controls. The reviewer found it best for users who want a powerful natural gas unit with a built-in fan and a compatible thermostat for basic temperature control, delivering strong heat output and easy mounting without complicated setup.
Key Features
- 50,000 BTU output: Provides enough heat to warm spaces up to about 1,250 sq. ft., making cold garages and medium barns usable in winter.
- Powered exhaust venting: The fan-assisted exhaust allows vertical or horizontal vent runs, offering flexible installation to fit existing roof or wall penetrations.
- Built-in high velocity fan: Pulls cool air across the heat exchanger and forces warm air into the space for faster, more even heat distribution.
- Thermostat compatibility: The included thermostat works with multiple Big Maxx models and uses a simple 2-wire hookup for easy temperature control.
- Simple mounting and access: Brackets, external power access, and thermostat connections reduce installation time and let the heater mount with only a 1 in clearance.
Who It's For
The Mr. Heater 50,000 BTU unit is aimed at homeowners and small business owners who need a reliable ceiling-mounted natural gas heater to warm a 1- to 2-car garage, hobby shop, or similar workspace. It suits users comfortable with basic HVAC installation or those who will hire a tradesperson to handle gas and venting per local codes.
Those who should look elsewhere include people who need ultra-quiet, decorative space heaters for living areas or those who require electric-only solutions. Also consider other sizes if your space is significantly smaller than 1,250 sq. ft. or much larger.
Pros & Cons
Pros
- High heat output warms up to around 1,250 sq. ft., useful for garages and small shops.
- Fan-forced design improves heat distribution so corners and work areas warm faster.
- Thermostat bundle and 2-wire hookup make temperature control simple and installs quick.
- Flexible venting options allow vertical or horizontal runs to match job site constraints.
Cons
- Some users report concerns about long-term durability under heavy commercial use, so buyers should consider maintenance and mounting location.
- The unit requires natural gas and 115v AC power, so it is not suitable where those utilities are unavailable.
Specifications
| Model | Big Maxx MHU50NG (natural gas) |
| Heat output | 50,000 BTU per hour |
| Coverage | Up to 1,250 sq. ft. (approx.) |
| Power required | 115v AC |
| Venting | Powered exhaust for vertical or horizontal venting |
| Thermostat | Included 2-wire compatible with Big Maxx MHU models |
| Mounting clearance | 1 in with supplied brackets |
Our Verdict
For those who need a robust, ceiling-mounted natural gas heater for a garage or shop, this Mr. Heater 50,000 BTU bundle offers strong heat output, flexible venting, and an easy-to-install thermostat at a reasonable value. It is a solid choice when utility access exists and durability is managed by proper installation and service.
Frequently Asked Questions
Can this unit be vented horizontally?
Yes; the powered exhaust allows both vertical and horizontal venting, subject to local code and clearance requirements.
What power does the heater need?
The unit requires a standard 115v AC supply for the fan and controls.
Is the thermostat hard to install?
No; the included thermostat uses a simple 2-wire system and mounts in minutes with the supplied brackets and connections.
Editor's Take
The Mr. Heater 50,000 BTU natural gas unit heater bundle is a practical ceiling-mounted solution for garages and small shops, offering strong heat output, flexible venting, and simple thermostat control, making it good value when natural gas and 115v power are available.

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