Mr. Heater Big Maxx MHU125
#2 in GasFull review
One of the two biggest heaters here at a fair price, for a large shop or pole barn.
Amazon $934.23$934.23
3.1/5
The value pick of the Reznor line for a three or four car garage, with a 5 year parts warranty.
- 62,250 BTU/hHeat
- BothFuel
- NoThermostat
Check price at Amazon$1,520
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 5 year parts warranty and 10 years on the heat exchanger
- About the same price as the 60 for 25% more heat
- Diagnostic display for easier service
Cons
- Needs a wall thermostat and venting kit, bought separately
- Propane needs a conversion kit
The Reznor UDXC family
Every Reznor UDXC model we rank, smallest first. Ratings compare each against its own fuel.
| Model | Heat | Rating | Price |
|---|---|---|---|
| Reznor UDXC 45 | 37,350 BTU/h | 2.9/5 | $1,389 |
| Reznor UDXC 60 | 49,800 BTU/h | 3.0/5 | $1,504 |
| Reznor UDXC 75 (this one) | 62,250 BTU/h | 3.1/5 | $1,520 |
How it scores
The rating comes from 3 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.
Specifications
| Model number | UDXC-75 |
|---|---|
| Heat | |
| Heat output | 62,250 BTU/h |
| Gas | Both |
| Efficiency | 83% |
| Venting | Power vented |
| Controls and build | |
| Thermostat | No |
| Digital display | Yes |
| Remote or app | No |
| Weight | 76 lb |
| Warranty | 5 years |
Alternatives in this fuel
Mr. Heater Big Maxx MHU50
#3 in GasFull review
The low cost way into vented gas heat for a two car garage. Budget for a thermostat and venting kit.
Amazon $452.79$452.79
Reznor UDXC 60
#5 in GasFull review
A three car garage heater with Reznor’s long warranty, ready for propane out of the box.
Amazon $1,504$1,504
Compare
Compare the Reznor UDXC 75 with any other garage heater →
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