Mr. Heater 30K Blue Flame Dual Fuel
#1 in Vent-freeFull review
The pick for heating a big room on either fuel with a thermostat and a long warranty. Add the blower kit for high ceilings.
Amazon $265.39$265.39
The Mr. Heater 30K Blue Flame Dual Fuel is the better gas wall heater overall, rated 4.5 to 3.3. The Mr. Heater 30K Blue Flame Dual Fuel leads on warranty and fuel. The Dyna-Glo BFSS30NGT-4N 30K Blue Flame costs $11.88 less ($253.51 vs $265.39).
Dyna-Glo BFSS30NGT-4N 30K Blue Flame
#8 in Vent-freeFull review
A thermostat blue flame heater for a large natural gas room or garage. It works well, but the Mr. Heater dual fuel 30K has a longer warranty for little more.
Amazon $253.51$253.51
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 Mr. Heater 30K Blue Flame Dual Fuel for warranty (5-year warranty vs 1-year warranty) and fuel (runs on propane or natural gas vs natural gas only).
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 | Mr. Heater 30K Blue Flame Dual Fuel | Dyna-Glo BFSS30NGT-4N 30K Blue Flame |
|---|---|---|
| Overall rating | 4.5/5 | 3.3/5 |
| Value 30% | 73 $8.85 per 1,000 BTU ($265.39, 30,000 BTU) | 76 $8.45 per 1,000 BTU ($253.51, 30,000 BTU) |
| Heat output 15% | 100 30,000 BTU/hr | 100 30,000 BTU/hr |
| Controls 20% | 75 thermostat, electronic ignition | 75 thermostat, electronic ignition |
| Fuel 5% | 100 runs on propane or natural gas | 0 natural gas only |
| Warranty 30% | 100 5-year warranty | 0 1-year warranty |
Specifications
| Mr. Heater 30K Blue Flame Dual Fuel | Dyna-Glo BFSS30NGT-4N 30K Blue Flame | |
|---|---|---|
| Heat | ||
| Venting | Vent-free | Vent-free |
| Heat type | Blue flame | Blue flame |
| Maximum input | 30,000 BTU/hr | 30,000 BTU/hr |
| Minimum input | - | 15,000 BTU/hr |
| Heating area claim | 1,000 sq ft | 1,000 sq ft |
| Fuel and controls | ||
| Fuel | Dual fuel | Natural gas |
| Thermostat | Yes | Yes |
| Blower | No | No |
| Ignition | Electronic (battery) | Electronic (battery) |
| Needs an outlet | No | No |
| Oxygen depletion sensor | Yes | Yes |
| Build | ||
| Warranty | 5 years | 1 year |
| Released | 2018-10 | - |