In that case why aren't you installing a heat pump?
Which would be much more economical to operate than a gas fired furnace.
It isn't the condition of the ductwork which concerns me - it is the physical size of the ductwork.
If you increase the cooling capacity - you Will have to also increase the air flow volume a like percentage. How will 50% MORE air get through the original sized air ducts properly?
Let me answer for you - it won't.
Cutting a larger inlet hole is just a tiny bit of it - the entire duct system needs to be larger. Please ask your contractors how they propose to accomplish this feat.
Originally Posted by Ryguymedia
The conventional view serves to protect us from the painful job of thinking.