Lennox XC21 AC SEER Lower Than Expected?

[capthomas]

I've had a Lennox HVAC system installed in a new home in Central Florida. The equipment is:

A/C Compressor - Lennox XC21-060
Coil - Lennox CX34-62D-6F
Furnace - Lennox G60UHV-60D-135

The Lennox literature and website advertise "up to 20.5 SEER" for the XC21. I realized that the "up to" meant that it might not be quite 20.5 based on the coil / air handler, but did not expect that the rating tag added on installation would say it is a 16.5 SEER. That's about a 20% reduction from the advertised number.

Is this a normal thing? What equipment changes would it take to get this close to the advertised 20.5 SEER?

Cap

[BaldLoonie]

Typical. Pretty rare for a 5 ton unit to have the highest SEER rating.

[Nytefog]

When paired with the correct coil/air handler and or furnace the unit has the capability or reaching "20.5" seer. Most likely the units rating with with a generic coil rates at "16.5".

[t527ed]

Originally Posted by capthomas

Is this a normal thing? What equipment changes would it take to get this close to the advertised 20.5 SEER?

Cap

5 ton units are always the "pigs" in the efficiency line up.

only way to get the rated #s is with 2 and 3 ton units.

what you have listed is the best match available for that unit.

[capthomas]

Thanks for the responses.

I feel more confident in the install now.

Cap