Furnaces

Intertherm pioneered the first furnace engineered specifically for trailers. That same innovation now carries into a full line of models purpose built for factory-built homes, including manufactured, modular, and tiny homes.

Purpose-built sizing helps units fit common closet and alcove applications without compromising airflow or service access. That matters when replacing a furnace for a mobile home, where space is tight.

Downflow and upflow orientations let installers match equipment to your home’s duct layout, whether manufactured, modular, or tiny. Each furnace is factory-tested to meet standards for factory-built housing, so performance is consistent and predictable.

Whether you are replacing a furnace in a manufactured, modular, tiny, or mobile home, matched components and clear orientation guidance help speed installation and ensure comfort from day one.

All our furnaces offer five-year extended parts warranty under the Intertherm brand.

Best for homes without gas or propane lines or warmer climates where heating needs are less extreme. Intertherm electric models deliver 100 percent efficiency equivalent at the point of use, offer simple installation, and come in multiple orientations for an easier fit in manufactured, modular, and mobile homes.

Choose gas when you want strong heat output and lower operating cost in colder climates. Intertherm offers both 80 percent AFUE models for straightforward replacements and venting flexibility, and high efficiency models up to 96 percent AFUE for bigger energy savings, with two-stage options like MG2S or MG3S to reduce temperature swings.

Oil furnaces provide reliable heat where natural gas is not available, with durable performance for off-grid and rural installations. Check BTUH and orientation, then use the Dealer Locator for sizing and venting guidance.

Include a filter bar above the table with Home Type, Fuel Type, Orientation, AFUE band, BTUH range, Staging, Climate, and Compatibility.

For complete comfort and efficiency, pair your furnace with an Intertherm split air conditioner or heat pump and a properly sized indoor coil. Matched systems are tested to work together, helping deliver steady temperatures and lower energy use. See Equipment Matches on each product card.

What size mobile home furnace do I need?

When replacing a furnace start with your home’s square footage and climate, then have a licensed dealer perform Manual J calculations. The comparison table shows BTUH ranges to discuss with your installer. Use our dealer locator to schedule sizing.

Is a downflow furnace required for mobile homes?

Many manufactured homes use downflow because ducts are below the unit. Some modular homes need upflow. Check your duct layout, then filter by orientation.

What is the most efficient mobile home gas furnace?

Intertherm models with up to 96 percent AFUE, such as MG2S or MG3S, offer high efficiency. Two-stage models can improve comfort in cold climates.

Can I replace a mobile home gas furnace with an electric furnace?

Yes, if your electrical service and wiring can support the new equipment. Use the Electric filter and speak with a licensed dealer to verify power requirements.

Do I need a special furnace for a manufactured or modular home?

Yes. Intertherm furnaces are designed and tested for factory-built housing and include features that fit common closet and alcove installations.

What is the difference between single-stage and two-stage heating?

Single-stage runs at one output. Two-stage furnaces can run at a lower stage most of the time, then ramp up in colder weather for steadier temperatures.

How do I find a licensed dealer to install a mobile home furnace?

Use the Dealer Locator to find trained installers in your area. They can size, recommend, and install the right model to replace your current furnace.

Are Intertherm furnaces compatible with central air conditioners for mobile homes?

Yes. Look for “Works with Intertherm split system” in the comparison table and check Equipment Matches on each product card.

What warranty do Intertherm furnaces include?

All furnace products are eligible for a five-year parts warranty when registered. See warranty terms for details.