Carrier and Payne with AFUE to 98.5% and ECM drive on select units.
Carrier, Burnham, Peerless and IBC Technologies with AFUE to 96% and modulating burners on select units.
Carrier water to water and water to air with COP to 5.1
Carrier, Payne, Panasonic with HSPF up to 20.5.
Make-Up Air Units
AppliedAir, Sterling and Reznor
Sterling, Modine, Reznor