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
The Reznor UDXC 45 is the better garage heater overall, rated 2.9 to 2.5. The Reznor UDXC 45 leads on warranty. The Modine Hot Dawg HD45 wins on controls. The Modine Hot Dawg HD45 costs $426 less ($963 vs $1,389).
Modine Hot Dawg HD45
#10 in GasFull review
A proven two car garage heater from a commercial heating maker. Cheaper options give similar heat.
Amazon $963$963
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 Reznor UDXC 45 for warranty (5-year warranty vs 2-year warranty).
- Choose the Modine Hot Dawg HD45 for controls (electronic ignition vs none of the 3).
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 | Reznor UDXC 45 | Modine Hot Dawg HD45 |
|---|---|---|
| Overall rating | 2.9/5 | 2.5/5 |
| Value 40% | 9 $37.19 per 1,000 BTU ($1,389, 37,350 BTU/h) | 28 $25.78 per 1,000 BTU ($963, 37,350 BTU/h) |
| Controls 25% | 0 none of the 3 | 40 electronic ignition |
| Warranty 35% | 100 5-year warranty | 25 2-year warranty |
Specifications
| Reznor UDXC 45 | Modine Hot Dawg HD45 | |
|---|---|---|
| Heat | ||
| Heat output | 37,350 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 | 62 lb | 72 lb |
| Warranty | 5 years | 2 years |