In July of 04 we had our residential, contractor/builder installed 91 model Comfort Maker heat pump and air handler in service since 93 replaced with a York 14 seer model E1RE030S06 heat pump, a 17.5 var. speed air handler model N1VSB1206, w/coil model G2FD046H17, and a Honeywell model 8611G2002 Deluxe programmable heat pump thermostat. To this day, we have only had one electrical billing cycle (2 mths) with lower energy consumption than with the older unit. Am I missing something or is there something drastically wrong with either the unit or its sizing? Shouldnt there be some sort of energy savings realization from this endeavor?
The house was constructed in 92-93, single floor, wood frame, insulated attic, all exterior windows and doors double pained, floor insulated with 61/4 R-19, the ceiling is insulated with 91/2 R-30, it has roughly 1397 ft2; one area of that footage, approximately 563 ft2 has a 116 vaulted ceiling, three exterior walls, two 72x30 windows on one exterior wall (end of house), an exterior 72 French door and a small x24 window (kitchen area)on another exterior wall (rear of house), a 32 front door and , two standard 48x30 windows on a second exterior wall opposite the French door wall (front of house); in the rest of the house there are three additional 48x30 windows (2 on front 1 on rear walls) and a x24 window (on rear wall). The air handler and all ductwork are located in the semi-finished basement, the ductwork, unfortunately, is duct board and the non-reflective sleeved, flexible round duct. There are two returns in every room (hi/lo) and two large (20x20) returns in the vaulted area. There is one register in each of the three bedrooms and two bathrooms, in the vaulted area there is a register on the rear wall and two registers on the front wall with a final register located about 4 ft off the rear wall in the kitchen area (part of the vaulted area). There are also three partially open registers in the basement with no returns there. These registers have been operated both partially open and closed and were installed by the replacement contractor with the inquiry prior to installation, Will this require a bigger unit or have much of an affect on the system?
I would appreciate any opinions about this situation as well as any suggestions.