Bryant® Heating & Air Products & Systems Home » Products and Systems Bryant® Heating & Cooling Systems EVOLUTION TM EXTREME 24 VARIABLE-SPEED HEAT PUMP Model: 284ANV EvolutionTM Variable-Speed Heat Pump Model: 288BNV PREFERRED TM SINGLE-STAGE HEAT PUMP Model: 225S PREFERRED TM 2-STAGE HEAT PUMP Model: 227T LEGACY TM SINGLE-STAGE HEAT PUMP Model: 215S LEGACY TM SINGLE-STAGE COASTAL HEAT PUMP Model: 215SAN***C