A couple years ago we switched from a forced air electric furnace to a York Affinity 5T Heat Pump. Since installation I feel the system still needs tweaking and may have an issue with duct size. The install company did not do a load calculation before selecting the unit.

Problems I'm noticing is uneven temperatures throughout the house, some registers have very weak output and others too strong. The system is devided into two zones with shared returns. At times when the the smaller zone is calling the system will pulse like it is unable to push enough air through the ducts. A bypass damper from the output to the return was installed last year but the problem persists unless it is almost wide open. System seems slow to bring up the temperature even a few degrees and seems to run for long durations.

I would like to find a very knowledgeable contractor in the Southern Nova Scotia, Yarmouth area to come out and assess the system and advise areas of improvement.

Please advise your recommendations.