Williams 3003822 Direct Vent Furnace
#11 in Direct ventFull review
A strong value pick for heating a small home or cabin on natural gas with no power needed. Add the wall thermostat for automatic control.
HVACDirect $1,290$1,290
2.0/5
For a bedroom or small room in an area with outages, where heat that runs with no power matters more than automatic temperature control. Budget for the wall thermostat.
- 15,000 BTU/hrOutput
- PropaneFuel
- FurnaceHeat
- NoThermostat
Check price at Amazon$1,499
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Heats without electricity, so it keeps a room warm through a power outage
- Slim 20 in wide cabinet fits under a window or in a small bedroom
- Vent kit for walls 4 1/2 to 13 in thick comes with it, so there is no flue to build
- 10 year warranty on the combustion chamber
Cons
- No thermostat in the box: without the optional wall thermostat you set the flame by hand
- Only one year on parts other than the combustion chamber
- About $1,500 on Amazon for 15,000 BTU/hr, pricey for a millivolt furnace
How it scores
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.
Specifications
| Model number | DV215SGXLP |
|---|---|
| Heat | |
| Venting | Direct vent |
| Heat type | Furnace |
| Maximum input | 15,000 BTU/hr |
| Fuel and controls | |
| Fuel | Propane |
| Thermostat | No |
| Blower | No |
| Ignition | Push button |
| Needs an outlet | No |
| Build | |
| Warranty | 1 year |
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