Hello,

I have a ranch home with two bedrooms and one bath over a crawl space.

The other rooms are over a basement.

These two rooms over the crawl space do not heat or cool to the same degree
as the rest of the house, lower air volume.

I have a gas forced air unit with one zone.

The duct work through the crawl space is flex insulated piping, with 4x10 vents.

I think the pipe is 6", but not sure, yet.

I'm wondering if simply increasing the duct work to the next size would increase
the air enough to solve my problem????

I have read a little about "Zoning". I've seen motorized valves and also rubber
type, any suggestions, please

Thank you

What you really need to do or have done is a manual D on your home. This will take the guess work out of the equation since guess work by the original contractor got you into the problem to start with.

Energy Savers: Sizing Heating and Cooling Systems




http://www.iccsafe.org/e/prodshow.html?prodid=9302S00&stateInfo=pQgloBOFdbQ ldaTc2755%7C2

Or you can search around on Google for more info on manual D

Hi,

Thanks for the links - time for studying!