Manufactured Homes and HVAC -Wenatchee Home Inspections

Home Inspector with NCW Home Inspections, LLC

Manufactured Homes and HVAC -Wenatchee Home Inspections

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.


One of the issues I see in manufactured homes is poorly designed cabinets that do not allow for proper filter placement. As a result, you often get bypass of the filter resulting in debris in the furnace housing. When there is a Cooling installed you can get quite a bit of debris collecting on the Air Conditioning coil.









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



So as example they recommend the following;


Home Sq Ft

1121 to 1280

1281 to 1440

1441 to 1680

1681 to 1960

1961 to 2240

HVAC Tonnage







Link to information-

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                                                   509-670-9572

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Kristin Johnston - REALTOR®
RE/MAX Platinum - Waukesha, WI
Giving Back With Each Home Sold!

Interesting information...thanks for sharing it and happy Monday!

Aug 28, 2017 06:54 AM
Jay Markanich
Jay Markanich Real Estate Inspections, LLC - Bristow, VA
Home Inspector - servicing all Northern Virginia

When I think manufactured home I see in my mind's eye two halves of the same house brought together in the middle.  The foundation is created in advance.

Out here I have seen all sorts of HVAC systems, including those that have used CSST.  I always wondered about the use of that tubing in a structure that gets moved around!

Aug 28, 2017 10:34 AM
Donald Hester

Manufactured homes are only good for one set. They are not really designed to be moved again. If moved again no one will finance them that I know of.

Aug 30, 2017 07:53 AM
Jay Markanich

I knows dat.  Moving it the first time is bouncy!

Aug 30, 2017 02:42 PM
Joan Cox
House to Home, Inc. - Denver Real Estate - 720-231-6373 - Denver, CO
Denver Real Estate - Selling One Home at a Time

Donald, thank you for sharing your extension knowledge on the HVAC systems in manufactured homes.   Have sold a couple.

Aug 30, 2017 06:15 AM
Donald Hester
NCW Home Inspections, LLC - Wenatchee, WA
NCW Home Inspections, LLC

Joan Cox Thank you, I do quite of few of these homes every year. I perform Foundation inspections on them so I get to crawl around them fairly regularly.

Aug 30, 2017 07:56 AM