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A furnace uses either gas, oil, or electricity to create heat, which is then transferred throughout the home. Now the most common method of central heating, furnaces come in many sizes and styles, all of which are available right on eComfort.

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AFUE (Annual Fuel Utilization Efficiency) measures the efficiency of combustion equipment over the entire heating season, and is calculated by dividing the amount of energy that is actually heating your home by the total energy contained in the fuel used by the boiler/furnace. Learn More

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Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.

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Orientation describes the direction that air will flow through a piece of equipment. (e.g. air will flow horizontally through a "Horizontal" unit heater.) Most equipment will only function properly if installed in the proper orientation.

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To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.

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Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control. Learn More

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Williams Monterey - 25,000 BTU - Gas Fired Wall Furnace - LP - 70% AFUE - Single Sided

Model: 2509621A

(7)

On Sale Ends 08/31

$641.25

Was

$675.00

SAVE $33.75

Factory-Direct

Free Shipping & Lift Gate

*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.