A natural gas radiant heater for a mid size room or workshop that comes complete with blower and thermostat. Pay the premium if you would otherwise buy a fan kit.
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its venting. How we rank explains each one.
| Model number | HSSVFRD20NGBT |
|---|---|
| Heat | |
| Venting | Vent-free |
| Heat type | Infrared |
| Maximum input | 20,000 BTU/hr |
| Heating area claim | 500 sq ft |
| Fuel and controls | |
| Fuel | Natural gas |
| Thermostat | Yes |
| Blower | Yes |
| Ignition | Electronic (battery) |
| Needs an outlet | No |
| Oxygen depletion sensor | Yes |
| Build | |
| Weight | 27 lb |
| Warranty | 5 years |
A thermostat blue flame heater for a living room or cabin of up to about 700 sq ft that may switch between propane and natural gas. The long warranty sets it apart.
Amazon $199.99A radiant heater for a drafty room, shop or cabin up to about 700 sq ft on either fuel. Radiant heat suits spaces where warm air escapes.
Amazon $209A thermostat infrared heater for a large natural gas room, basement or garage. It offers a longer warranty than most budget rivals.
Amazon $257.67Compare the Heatstar HSSVFRD20NGBT 20K Radiant with any other gas wall heater →
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