| http://www.w3.org/ns/prov#value | - My contractor also offered me the following option, which I believe is a multi-stage heating and colling system and the equipment he prefers: York SEER 16 Twin-Single Heat Pump (Model E4TS036S06) York Variable Speed Air Handler This York system is priced out about the same as the Trane XLi14 system.
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