Aluminum vs Copper Coils
I have to replace my existing 13 year old air conditioner. We have two 2.5 ton units. I'm reparing the downstairs unit and replacing the upstairs unit. (The downstairs is on a home warranty but not the upstairs.)
I'm getting different quotes. One company recommended another 2.5 ton Trane unit while a second company said I needed 3 ton units (1800 sq ft area) and trashed current Trane units because they use aluminum instead of copper coils. He said copper works much better at sucking the heat out of the air.
Help!! There is a huge price difference (double) and I dont' know what is important and the most sensible trade-offs.