Hello Experts

I received valuable suggestions from this site when I tried to install a new gas cooking range and how to pass the inspections. Now I am planning to do another project where I am moving from central heater from the closet to the garage. The gas pipe goes via the garage and I can easily tap a line for the central heater. The only worry I have is for the re-ducting. Since I won't have any crawling space to go with because of the foundation, I am forced to use the ceiling on top. I am worried about the return air flow from the house. My contractor told me that he will put the return flow on the ceiling. Is that sufficient? Are there any other things I should be looking for? I am also planning to get permit for this work. Please advice if there is any specific ducts I should recommend? Any other things which can help me in this project would be of greatly appreciated.

Thanks

First check with local authorities. Gas appliances in garages are permitted in some localities but must be elevated above the floor. Other localities may not permit gas appliances in the garage.

Hello Harold

I remember getting advice earlier from you and thanks for that. I remember seeing some other houses in the street where they have the central heater in the garage, but I will check that for sure with local authorities. Yes there will be an elevated floor put up on the garage. Does the duct need to be of certain dimension since we will be using this as single point to get return air from inside the house?

Thanks

Return on the ceiling is nothing unusual. Few things to remember: have your A/C contractor to install large diameter return as well as large size return register. The larger the return pipe and register the quieter the operation will be - especially at night. Don't go bellow 18". Select ducts with highest insulation value. Moreover, in my area, furnace has to stand on a platform elevated 18" above the floor. Good luck. Milo

Hi Milo

I asked him about the questions you had posted and he mentioned he is using R6 insulation...

Also do I need to be aware of any issues during the tests for the permit with the city?

Thanks

Hello Experts

Thanks for your advice, the project was completed and inspection passed...

Congratulations !