I am new to this forum and to heat pump purchasing. Here is my situation.
I live in a condominium in Southeast Pennsylvania. My residential location is entirely on the second floor of a building. My neighbors live on the first floor. The outdoor unit is on the ground outside. The lines run through the walls up to the second floor. My ducts are in the attic. The flow of air inside is from the top of the room to the bottom of the room.
Here is what I have been told by prospective installers, all of whom are NATE certified. What is accurate on this list?
1. Since the ducts are in my attic and the air flow in the interior runs from the top of the room to the bottom of the room, I must add 15% to the manual J load calculation. Even though your neighbors, in comparably sized housing, use 2 ton units, you need a 2.5 ton unit.
2. Again, as a result of the top to bottom air flow, a variable speed air handler is of no value to you. You should purchase only a standard air handler.
3. Over the course of a year, your maximum monthly electric bill is only $100 more than your minimum monthly electric bill. The cost savings from a replacement heat pump will be minimal. Limit yourself to a 13 SEER unit with a standard air handler. There is no cost benefit in a higher efficiency system.
4. You can use a unit rated for 3/8 inch lines with your current 1/4 inch lines. All you need is a TXV.
5. You can use a new R-410 system with your current R-22 lines. All you need to do is to let us flush the current lines with RX-11.
6. You currently have a condensation pump. Condensation is not being currently removed by any gravity based system. You should allow us to tap into your current tubing and divert the condensation into new 3/8 inch tubing which we will route into your laundry room and then make use of the moisture disposal system used by your washing machine. That will preserve the life of your current lines.
Thank you for your time.