I have a 12 year old split system 5-ton Lennox AC, gas furnace in a 2000 Sq foot home that heats fine but needs a new cooler.
I was going to replace everything until a friend of a friend who does AC work suggested I install a new Goodman 13 SEER R22 unit outside and keep the Lennox coils from my existing 10 SEER unit. He said he checked with Lennox and that the coils will work with the new unit.
I'm new to all this but read you need to match the coils to the new system to achieve the stated SEER rating. Is this correct?
Any thoughts would be greatly appreciated?