A/C Tons Too Much?

psp212May 5, 2012

Hi We are in midst of gut renovation and plan on installing ducted 2 zone central a/c. Our HVAC installer and g/c think we need two 5 ton a/c units, based on "rule of thumb" estimates. Our experienced friend says we need no where near that much. Our place is a brick 4 story townhouse, plus a cellar that we don't really need to heat or cool, with buildings up against each side wall. 16ft wide, 40 some feet long. Approximately 700 sq ft interior space per floor. Any thoughts on this? Also, anyone know a firm in NYC that would do Manual J calculations? Thanks very much!

Thank you for reporting this comment. Undo

Ten tons of cooling for your townhouse is way oversized in my opinion. You need to find an HVAC contractor who will do a proper calculation.

    Bookmark   May 5, 2012 at 4:29PM
Thank you for reporting this comment. Undo


I would definitely go with two systems but not 5 tons each..

If it's a major gutting, then inquire about zoning controls for each system.

Ductwork needs a thorough evaluation and the practicality of zoning controls to be pursued.


    Bookmark   May 5, 2012 at 5:11PM
Thank you for reporting this comment. Undo

The location is New York City -- thanks!

    Bookmark   May 5, 2012 at 7:59PM
Thank you for reporting this comment. Undo

Obviously 2 5 ton units is too much. Amazing with all the rules in NYC, no one is watching the sizing.

Dealing with stubborn contractors is tough. Good luck.

    Bookmark   May 5, 2012 at 8:42PM
Sign Up to comment
More Discussions
Disconnect for Fujitsu mini split indoor unit (slim duct type)
We are installing a Fujitsu mini split system that...
HVAC design
In determining the HVAC system to use in our new construction,...
Geothermal in new construction.
Our house is currently under construction, and while...
2 HVAC quotes: need to decide
I'm ignorant of HVAC, but willing to do the research...
Seeking input on HVAC replacement
I am getting ready to do a full replacement. Current...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™