Heating, Air Conditioning, Fridge, HVAC/tons of A/C?


I have a 75,000 BTU gas furnace in my garage now.  I want to replace it and add A/C at the same time.  Two contractors have quoted me 4-ton A/C units.  The third contractor, who seemed to be the sharpest of the three, quoted me a 3-ton unit.  He said my house would not accommodate a 4-ton unit because my plenum is only 14" and my return air grill is only 12" x 24".  Do you agree that I am limited to a 3-ton A/C because of these house measurements? Thank you, Joe Mantione, San Diego


The only real way of knowing what size heating and cooling you really need is to have a load calculation done if none of them did one ask them why. I would get a load calculation done first from a reputable Contractor  then see if your existing ducts can handle the load, you may just need a little duct modification only.

Heating, Air Conditioning, Fridge, HVAC

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40+ years diversified experience.An HVAC/Refrigeration Self Employed Contractor since 1986. NATE Certifield. Answer questions pertaining to Residential and Commercial Air Conditioning , Warm Air Heating, Heat Pump systems.Mechanical and Electrical troubleshooting of these systems.Be as detailed as possible when describing problem.Packaged unit or split systems.No appliance questions.


Installation and Troubleshooting, Mechanical and Electrical, in following areas, Refrigeration ( Walk In and Reach In Coolers and Freezers ) Commercial Roof Top and Packaged Heating/Cooling ( Natural Gas,Propane, Electric, and Heat Pumps ) Computer Room Air Conditoning Systems,Commercial Residential Packaged and Split Systems Air Conditoning and Heat Pumps.Warm Air Oil , Natural and Propane Gas Heating systems.

Graduated from Private Technical School in 1975. An HVAC/Refrigeration Contractor . Have Unlimited Heating/Piping and Cooling Contractor License.Limited Sheetmetal Contractors License.NATE Certifield. York Certifield Master Heat Pump Technician 1986. Served 33 years combination Active Duty Air Force , Air Force Reserves and Air National Guard in the HVAC/Refrigeration Shop/Mechanical Shop. Troubleshooting/Installing HVAC/Refrigeration Equiptment Worldwide. Retiring in 2003 as a Senior NCO ,and a Mechanical Superintendent.

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