I should have better identified my setup. New Carrier Equipment. Oil Furnace and Heat Pump. Two stage HP. Variable speed blower. I will verify what is happening, but what I believe I am seeing is that the Heat Pump comes on to cool the house late in the morning. It runs at Single Stage for a while and then shifts to two stages of cooling. What happens next is that it goes back to single stage, very low fan speed, and stays that way for hours and hours. If the inside humidity was high, this is what I would expect. However, the inside humidity is low (~45%), the set point is the default 60%. And, I turned the dehumidification feature Off at the tstat. The fan is in Auto. During those hours that the Heat Pump is running, condensation is forming on the outside of the Supply Plenum and the adjacent supply ducts immediately off the Supply Plenum. What I don't understand is why is the HP continuing to run for hours after reaching the set temperature. This is my first heat pump and I have no experience whatsoever as to what is normal.

Hold on RAVI! I am not sure if I understand it correctly. I posted what I THINK is how it works, but the guys on here may tell you I am wrong. I posted to see if I understood it correctly or not, but got what I think was a veiled insult from saltidawg, not sure if he intended that or not.... I ended up with the 2 stage, but I think it was knee jerk reaction to a price reduction my contractor offered me that made it seem like a good idea. I so excited that I got him to lower his price that I forgot the big picture and didn't ask him if he could also give me a better price on a one-stage (the 1-stage he had offered was a lower end, so I would have had to negotiate a better 1-stage). Therefore, I think I may be spending more than I need to and am HOPING the 2-stage was a wise idea. If price is the issue, get the 1-stage. Are you the guy where it was $1300 more? My quote from a large company here, was $1300 more for the 2-stage than the 1-stage. It ended up as a decent price for a package of work I was having done so I went with it. If I were just doing the hvac, I would not pay $1300 more for the 2-stage, with everything else the same. I think mike_home has some very good posts explaining everything. If you can afford it I think the 2-stage is nice to have, but not necessary. I have also read and been told that the 2-stage will help with the uneven cooling because it blows lower but longer. You might see if anyone responds to that claim, though I see you say they are larger rooms...can they add vents? Also, this may not be true, but my the salesman (claims he was a mechanic/installer) said that my furnace needs are between 80 and 100k so he is giving me the 100k because the blower will be stronger (they will and that should help with the cooling upstairs. I have 2 rooms that are usually warmer, they get the south sun that doesn't help either.That is sort of what you are saying with the cooling and the fan. Why does the 3.5 not get the rebate?

If you hired a general contractor, your contract is with them, and you should be conferring with them regarding questions or concerns about any aspect of your project. The exception would be in the event you have contracted directly with others to perform some portion of the work. HVAC systems need to be designed and specified. This is best done in the design phase as construction details (e.g., type and thickness of insulation; type and performance of windows and doors, home's orientation, etc.) affect the HVAC. You might, for example, find it more economic (and comfortable) to add insulation and reduce the size of your heating and air conditioning system, or to opt for better performing windows and doors to reduce heating and cooling requirements. Once the home is under construction, it's more difficult to make those choices. If you hired a design professional, I submit that the design of the HVAC system should have been included in the scope of their work unless specifically excluded for some darn good reason. If they don't have the expertise needed, they can hire a third party, but it needs to get done as part of a comprehensive design effort--not construction.

What is happening in 2023? R22 has been in phase out mode for well over 12 years now. The current refrigerant that replaced R22 known as R410a is going to be phased out. California enters this phase first. No new R410a installations in CA starting in 2023. R410a begins it's phase out with strict rules than the aformentioned R22 Freon. (no dry units like with R22). Texas is likely to enter this realm in 2025 at the latest. The refrigerants replacing R410a isn't much better than that of R410a. Two competing versions R32 & R454b both of which are mildly flammable. How flammable? mildly. If you choose R32 solution, that is likely to be phase out sooner because it is mildly more offending than R454b. But either of these choices shelf lifes will be short. Maybe 15 years, maybe 20. R22 is cost prohibitive now. If you have a unit that uses R22 --9 times out of 10-- and you spring a leak -- you buy a R410a unit now. Because? The new units have yet to arrive! ( this is assuming you can even find what you want now.) So in short order anything you buy now will essentially be obsolete "over night". This primarily will only effect you if you spring a refrigerant leak. BUT, refrigerant leaks nowadays are more common than 20 years ago. If you're curious what, where, how and why this is happening? I made a video about it embedded below for your convenience. Note: this video is only a starting point... Part 1.