Modine Hot Dawg HD125
#6 in GasFull review
A large shop heater from a commercial maker. The Mr. Heater Big Maxx 125 gives similar heat for less.
Amazon $1,552$1,552
The Modine Hot Dawg HD125 and the Reznor UDXC 45 are evenly matched, rated 2.9 and 2.9. The Modine Hot Dawg HD125 leads on controls. The Reznor UDXC 45 wins on warranty. The Reznor UDXC 45 costs $163 less ($1,389 vs $1,552).
Reznor UDXC 45
#7 in GasFull review
A two car garage heater for buyers who value the longest parts warranty here.
Amazon $1,389$1,389
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Modine Hot Dawg HD125 for controls (electronic ignition vs none of the 3).
- Choose the Reznor UDXC 45 for warranty (5-year warranty vs 2-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every gas garage heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Modine Hot Dawg HD125 | Reznor UDXC 45 |
|---|---|---|
| Overall rating | 2.9/5 | 2.9/5 |
| Value 40% | 54 $15.14 per 1,000 BTU ($1,552, 102,500 BTU/h) | 9 $37.19 per 1,000 BTU ($1,389, 37,350 BTU/h) |
| Controls 25% | 40 electronic ignition | 0 none of the 3 |
| Warranty 35% | 25 2-year warranty | 100 5-year warranty |
Specifications
| Modine Hot Dawg HD125 | Reznor UDXC 45 | |
|---|---|---|
| Heat | ||
| Heat output | 102,500 BTU/h | 37,350 BTU/h |
| Gas | Both | Both |
| Efficiency | 83% | 83% |
| Venting | Power vented | Power vented |
| Controls and build | ||
| Thermostat | No | No |
| Digital display | - | Yes |
| Remote or app | No | No |
| Electronic ignition | Yes | - |
| Weight | 143 lb | 62 lb |
| Warranty | 2 years | 5 years |