Quote:
Originally Posted by Neilk
Hello,
We are building a new house in Dallas and I am not liking what the HVAC sub is proposing so I am looking for second opinions. We are going to use foam insulation, but the sub is using R values of 13 for the walls and 21 for the roof joists. It seems as if those values are barely any better than regular insulation.
The reason I ask is that the HVAC guy is proposing 8 to 9 tons of capacity for what I was hoping to be a very well insulated 5,000 sq ft house. I was expecting to be around 6.
I am sure we have some experts here that can point me in the right direction. Should I tell him to up the R Values? Our builder is concerned that if we tell the HVAC guy to change his proposal, that we won't have any recourse should the design end up not working on our house. This part of the build has been a PITA.
Any HVAC guys here in Dallas?
Thanks for any advice!
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You want a 6 ton unit to cool or heat a 5000sq' hosue in Texas or are you asking if you increase the R value in the insulation is necessary?