News - manual J

There's too much hot air in here!

We are finishing up design for a family room addition and kitchen renovation for a duplex here in Del Ray.  The City of Alexandria requires a design for the HVAC system when submitting for the permit and the addition is only going to add a net 150 s.f. to the house, so our plan was to replace the HVAC system with a better performing one and keep the same size.  We found during this process that this house has a very common problem many homes share.  The HVAC system is oversized. In this case...the existing heating system is about 200% the size it should be.  The existing furnace is 60,000 btu's and the design calculations we performed indicate it should be 30,000 btu's.