Williams 3003822 Direct Vent Furnace

Last updated: November 2, 2026

Williams 3003822 Direct Vent Furnace
2.7/5#11 of 14 in direct vent gas wall heaters
2.7

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.

  • 30,000 BTU/hrOutput
  • Natural gasFuel
  • FurnaceHeat
  • NoThermostat
Check price at HVACDirect$1,290

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
  • 30,000 BTU/hr for about $1,290 is the best price per BTU among these direct vent furnaces
  • Combustion chamber carries a 10 year warranty
Cons
  • Thermostat costs extra; out of the box you set the flame by hand
  • 66% AFUE wastes about a third of the gas
  • 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.

ModelOutputRatingPrice
Williams 1403822 Direct Vent Furnace14,000 BTU/hr2.2/5$989
Williams 2203822 Direct Vent Furnace22,000 BTU/hr2.5/5$1,149
Williams 3003822 Direct Vent Furnace (this one)30,000 BTU/hr2.7/5$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 number3003822
Heat
VentingDirect vent
Heat typeFurnace
Maximum input30,000 BTU/hr
Efficiency66% AFUE
Fuel and controls
FuelNatural gas
ThermostatNo
BlowerNo
IgnitionPush button
Needs an outletNo
Build
Warranty1 year

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