In Chelan County and surrounding areas Manufactured Homes typically come with an Electric Forced Air furnace. These systems have to be listed for use in a manufactured home. The most common units I see are Colman, Kelvinator, and Intertherm.

All the manufactured homes are shipped with no attached Air Conditioner or Heat Pump.  When adding a new air conditioner or heat pump to a manufactured home in the State of Washington you will need a permit from Labor and Industries for the installation.

This is compounded when you have no cabinet at all for the coil. Though it is not necessarily not allowed it is a very poor choice due to issues of preventing bypass at the filters.

Below is an example of the issues with no cabinet for the Air Conditioning coil.

Air Conditioning Coil without housing and poor filter design

Coil clogged with debris from poor filter arrangement

Another important factor in the proper design of the system is sizing the Air Conditioning correctly.

For sizing of the HVAC unit, you can use this Energy Star “Manufactured Home Cooling Equipment Sizing Guidelines” as a way to get a feel for what the home should have in terms of tonnage required for the HVAC.

Wenatchee and surrounding area is a zone 24

Link to information-

https://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/SizingGuidelines.pdf?8fd5-1967

Heating and cooling are an important part of keeping the home comfortable. These systems should be cleaned and inspected at least annually.

"You can only teach someone, as much as they are willing to learn."

Chris G. Varona

If you find any errors or have additional information that would expand on any code, building standards or manufacturer requirements please let me know.

NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…  

Your Wenatchee and Chelan Professional Real Estate, Home and Structural Pest Inspection Service

Instructor- Fundamentals of Home Inspection-  Bellingham Technical College

WA Home Inspector Advisory Licensing Board

www.ncwhomeinspections.com                                                   509-670-9572

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