22 Jun '13, 4am

New HVAC and sizing... #green

I live in Auburn GA., which is about 40 miles northeast of Atlanta. My home is a four sided brick 2 story on an unfinished basement. It was built 13 years ago. HVAC system needs replacing due to continued mechanical problems. I've had several contractors in my home to provide me a proposal for a new HVAC system, and they all have provided proposals with the same size system I have now or larger . Not one of the contractors has performed a Manual J calculation for my home. They have all used the general rule of thumb and a very low square footage per ton to propose the size my new system needs to be. How should I go about trying to ensure that my new system will be sized correctly. Pricing changes greatly past 2 tons. Should I hire an independent company to perform a proper Manual J calculation or is there something I can do my self to determine the correct size AC and furn...

Full article: http://www.greenbuildingadvisor.com/community/forum/mecha...

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