I have a 10 SEER Heat-pump/AC unit that was installed 2 years ago. (I think the guys that did it were on the fly-by-night side.) It is 10~12 ton. I have also the original Rheem air blower system (1990), and a Hydrokinetix thermal storage unit that acted up 3 weeks ago.
Two companies have looked at the system (in both cases the technician called the owner to come out to look at it). One said it was "scary" and that the original 1990 installation has significant code violations. Both said that the whole system needed to be replaced because the air blower wasn't working properly. Both said the heatpump needed to be replaced to match the new air blower. (It needed the same SEER, and 10 is too low now.)
I think I'll have to bite the bullet ($$$) and follow the advice.
I have several questions to help me understand where my $$$ is really going.
1) I understand that 'SEER' is an efficiency rating. How is it measured, and how much different is, say, a 10 SEER heat pump from a 15 SEER heat pump?
2) Why do the blower and heatpump need to have the same SEER rating?
3) The blower is a fiberglass box with a squirrel cage fan. What would wear out in such a simple system?
4) What sort of annual maintenance should be done on a system? (In 9 years of living in the house I haven't done any to the HVAC system.)
(signed) I am curious and chilly.