The cheapest way here to heat a large propane room or garage with a thermostat. Pick it when price matters more than warranty length.
Amazon $188.99The ProCom ML300TBA-B 28K Blue Flame is the better gas wall heater overall, rated 3.3 to 2.9. The ProCom ML300TBA-B 28K Blue Flame leads on heat output and value. The ProCom ML200TBA-B 20K Blue Flame costs $18 less ($170.99 vs $188.99).
A low cost thermostat heater for a propane home, cabin or shop up to a mid size room. It stays useful when the power is out.
Amazon $170.99Prices 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 ProCom ML300TBA-B 28K Blue Flame for heat output (28,000 BTU/hr vs 20,000 BTU/hr) and value ($6.75 per 1,000 BTU ($188.99, 28,000 BTU) vs $8.55 per 1,000 BTU ($170.99, 20,000 BTU)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every vent-free gas wall heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | ProCom ML300TBA-B 28K Blue Flame | ProCom ML200TBA-B 20K Blue Flame |
|---|---|---|
| Overall rating | 3.3/5 | 2.9/5 |
| Value 30% | 92 $6.75 per 1,000 BTU ($188.99, 28,000 BTU) | 75 $8.55 per 1,000 BTU ($170.99, 20,000 BTU) |
| Heat output 15% | 90 28,000 BTU/hr | 50 20,000 BTU/hr |
| Controls 20% | 50 thermostat | 50 thermostat |
| Fuel 5% | 0 propane only | 0 propane only |
| Warranty 30% | 0 1-year warranty | 0 1-year warranty |
Specifications
| ProCom ML300TBA-B 28K Blue Flame | ProCom ML200TBA-B 20K Blue Flame | |
|---|---|---|
| Heat | ||
| Venting | Vent-free | Vent-free |
| Heat type | Blue flame | Blue flame |
| Maximum input | 28,000 BTU/hr | 20,000 BTU/hr |
| Minimum input | 14,000 BTU/hr | 9,000 BTU/hr |
| Heating area claim | 1,400 sq ft | 950 sq ft |
| Fuel and controls | ||
| Fuel | Propane | Propane |
| Thermostat | Yes | Yes |
| Blower | No | No |
| Ignition | Push button | Push button |
| Needs an outlet | No | No |
| Oxygen depletion sensor | Yes | Yes |
| Build | ||
| Weight | 28 lb | 23 lb |
| Warranty | 1 year | 1 year |
