we am changing hvac system to 2 zone and i got quote from couple of contractor.. this guy did energy audit and came up with quote to replace existing 120k and 4 ton system with 2 systems (60k and 2.5 ton)
i need advice on if the combination of system in following quote is efficient or not ? as furnace is infinity and out door unit is performance series ? i guess and there is no heat pump ??
system in attic for second floor where we have 4 bed rooms, he wants to put only one central return duct which i ask for individual return from each room ? what is the best practice ???
he is using combination of rigid and flex duct in attic ? i want to know if thats ok or rigid duct would be better ?
quote is as follows and i want to know the match of all units is fine or not and is there anything missing in quote, i mean technically is there any thing else needs to be added here ???
Two Carrier Infinity 96 (95.1% afue), 3-stage, variable speed, gas furnaces model 58MVC060F114.
Two Carrier Performance 15, Model 24APA530A, 2.5-Ton Puron 410a, condensers and pads. These combinations are rated at 15 SEER & 12.75 EER.
One Carrier cased evaporator coil model CAPVP3617.
One Carrier cased evaporator coil model CAPHP3617. Install secondary drain pan with safety switch.
Two Carrier Infinity controllers (digital programmable t-stat, with energy management).
All necessary sheet metal transitions. All necessary ducting for complete new second floor system in attic. Install ceiling supply and return in each room for second floor system.
Install Two Carrier filter media and cabinet.
Remove and dispose old equipment.
Install condensate pump with drain for A/C and furnace condensate. Furnaces to direct using PVC piping per manufacturer specifications.
All necessary electrical with new disconnects, whips and fuses at condensing unit.
Including all labor and misc. materials.
Manufacturer *Ten years all parts and labor*. Limited life on heat exchangers.
thanks for all expert advice in advance