AC for a Mobile Home: Central, Packaged or Mini Split?
Updated · By the Roof to Footing editors
There are four main ways to add or replace A/C in a mobile home: a split system that puts a cooling coil in the existing furnace, a packaged unit that sits outside and connects to the belly ducts, ductless mini splits, and window or through-wall units. Central options cost roughly $2,400 to $5,300 installed for a mobile home, according to HomeGuide, and the right one depends on whether the home's ducts and furnace can handle central air.
Check the cooling certificate first
Manufactured homes built to the HUD code carry a comfort cooling certificate, usually near the electrical panel or on the data plate, that says whether the home was built for central air conditioning and what the duct system can handle. Federal standards (24 CFR 3280) govern this. If the home isn't rated for central air, you may need duct work before adding it, or a ductless option.
The options
| Option | How it works | Typical cost (installed) | Best for |
|---|---|---|---|
| Split system (add-on coil) | Outdoor condenser plus a coil fitted to the downflow furnace | about $2,400 to $5,300 (HomeGuide, central) | Homes with a working furnace and good ducts |
| Packaged unit (AC or heat pump) | One outdoor cabinet; ducts connect under the home | similar to split, varies | Homes with no indoor space or replacing an old furnace |
| Ductless mini split | Wall heads in rooms; no ducts needed | about $2,000 to $6,000 (HomeGuide) | Leaky or undersized ducts, zoned comfort |
| Window or through-wall units | Self-contained | a few hundred dollars each | Budget, single rooms |
Sizing
Mobile homes are often smaller and less insulated than site-built houses, and ductwork is tight. HomeGuide's guidance pairs about 1.5 tons with a 600 to 1,000 sq ft home and larger units as size grows, up to about 4 tons for 2,100 to 2,600 sq ft. A load calculation is still the right way to size. Oversized units cool fast and leave the home humid.
Furnace compatibility
Mobile homes use downflow furnaces in a closet, and the cooling coil has to fit that specific furnace model. HVAC suppliers sell coils made for common manufactured-home furnace brands. Furnaces in manufactured homes must be listed for manufactured-home use; don't swap in a standard site-built furnace.
Fix the ducts first
Belly ducts and the flexible crossover duct between sections of a double-wide are common trouble spots. A torn crossover or disconnected register boot can dump much of your cooled air under the home. Before buying new equipment:
- Check the crossover duct for tears and sagging; replace it if needed
- Seal register boots to the trunk duct
- Check for crushed or separated sections under the home
- Make sure the return path is open (many mobile homes return air through the furnace closet door)
HomeGuide puts mobile home duct work at about $1,000 to $3,300 when it needs more than sealing.
Heat pump or straight AC?
A heat pump does both heating and cooling and can cut heating bills compared with electric resistance furnaces common in mobile homes. In cold climates, a cold-climate model or a backup heat source is needed. See 2 ton heat pump for sizing and efficiency, and 3 head mini split for a ductless whole-home approach.