What is variable speed?
Hello, I'm trying to figure out exactly what a variable speed is. We just finished building and have 3700 sq ft. 2200 down and 1500 sq ft upstairs. Our downstairs HVAC is doing great, but upstairs it is struggling. We have closed cell foam throughout and I have the thermostat set at 74 upstairs and the AC runs all day and most of the evening and the temp reading is 76. I called the service tech and he adjusted the freon and he said something about it needing to a being 10 and made it an 11. I really don't understand it but we upgraded to variable speed with the understanding that it would help with cost savings and that it would help with the humid southern air. We thought we were gettying humditiy control with our variable speed, but we can read the humity levels just not adjust them. When the tech came out and I explained that my fan never blew faster or
slower and that I wanted him to adjust the variable speed he said he
could not adjust it because it needed to stay at the fixed speed, so my
question is what exactly is variable speed? Our units are to be 3.5 ton
95% gas variable speed Trane down and 3 ton 95% gas variable speed
Trane up. The tech kept mentioning yesterday that the outside unit was a
2.5 but I cannot find it on the outside unit what tonnage it is. We paid for a 3 ton. Any and all help would be great.