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
2.2/5
For a small room or cabin on natural gas that needs heat through outages at the lowest price. Add the wall thermostat and expect higher gas bills than a sealed electronic unit.
- 14,000 BTU/hrOutput
- Natural gasFuel
- FurnaceHeat
- NoThermostat
Check price at Amazon$989
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs with no electricity, so it keeps heating through a power outage
- Under $1,000, the least expensive millivolt direct vent furnace here
- Vents straight through the wall, so no chimney or flue is needed
Cons
- Thermostat costs extra; out of the box you set the flame by hand
- 65% AFUE wastes about a third of the gas up the vent, well behind Rinnai’s 80%+
- Only one year on parts other than the combustion chamber
The Williams Direct Vent Wall Furnace family
Every Williams Direct Vent Wall Furnace model we rank, smallest first. Ratings compare each against its own venting.
| Model | Output | Rating | Price |
|---|---|---|---|
| Williams 1403822 Direct Vent Furnace (this one) | 14,000 BTU/hr | 2.2/5 | $989 |
| Williams 2203822 Direct Vent Furnace | 22,000 BTU/hr | 2.5/5 | $1,149 |
| Williams 3003822 Direct Vent Furnace | 30,000 BTU/hr | 2.7/5 | $1,290 |
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 | 1403822 |
|---|---|
| Heat | |
| Venting | Direct vent |
| Heat type | Furnace |
| Maximum input | 14,000 BTU/hr |
| Efficiency | 65% AFUE |
| Fuel and controls | |
| Fuel | Natural gas |
| Thermostat | No |
| Blower | No |
| Ignition | Push button |
| Needs an outlet | No |
| Build | |
| Warranty | 1 year |
Alternatives in this venting
Williams 2203822 Direct Vent Furnace
#12 in Direct ventFull review
For a living area or small house on natural gas where heat during outages and a low price matter most. Budget for the thermostat and a licensed installer.
HVACDirect $1,149$1,149
Empire DV215 Direct Vent Wall Furnace
#14 in Direct ventFull review
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.
Amazon $1,499$1,499
Compare
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