The Lennox XC21 air conditioner is part of the Dave Lennox Signature Collection. It is Energy Star qualified and bears the Good Housekeeping seal of approval. It is rated for up to 20.5 SEER, which the Lennox company says can save up to $1500 in utility bills in five years when compared to a 10.0 SEER air conditioning unit. Buyers of the XC21 may qualify for a federal tax credit. The unit is equipped with a low-sound fan and a two-stage scroll compressor, which Lennox says is on a low setting the majority of the time, reducing power usage.
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