This is kinda long - so i'll break it up into sections for you....
Let start by saying this is my first HAVC system I’ve ever had to purchase so I only know what I’ve read in regards to the various systems and the specs.
Anyway – our current system is running a bit inefficiently and our electrical usage has gone up (not just the cost but the actual KW hours) over the past few years and continues to go up despite improvements we have made which included new dual pane windows.
The current system is pushing at least 13-14 years old (it came with the house). And to make things worse, we have added square footage and re-configured a few walls since we moved in here 10 years ago. With that said – we decided to replace the roof mounted Heat pump.
Size and Location
The house is currently at about 2150 Sqft – dual pane windows throughout and is reasonably to well insulate. The house is located in the Metro Phoenix, AZ area
The Search For a Contractor
We started our search for a new system by calling in about 4 different companies and having each take a look at our house and suggest a new system and any changes (within reason) that may need to be made.
Long story short (well not so short…) we are about 99% settled on a contractor that we feel comfortable with and checks out well with the BBB. The price was good (not the lowest, but not the highest either)
Settled on a Contracor
They suggested a few things the others didn’t suggest or flat out said we didn’t need. After doing some research (some on this site) I think what this contractor is suggesting makes sense and will be effective. But since I’m no expert, I figured I would ask the experts for a second opinion
So here goes.
2-stage heating and Cooling
- Replace existing return for a larger grill
- Added a second return
- Total (combined) return are size - around 144sq inch
- Add an additional vent to the master bedroom
- Cut in a new roof jack for side by side configuration (current one is too small and is an over/under configuration)
Replace the main trunk to the existing return air for a larger diameter and to accommodate the new return air.
Attached to this post is a PDF of a quick drawing I did of the house with the location of existing vents and return air. It also shows the location of the new vents and the second return air. And… (is this enough info yet ) I also made an approximation of the layout and location of the duct work based on some basic visual inspection in the attic.
Anyone want to take a shot at this and give me a second opinion?
Thanks in advance