Serving Hartsville and Trousdale County
R-410A refrigerant — the standard in residential AC systems installed from the mid-2000s through 2024 — is being phased out under EPA regulations, with new systems now required to use lower-GWP refrigerants like R-454B. For Hartsville homeowners with existing R-410A systems, this creates a planning consideration: refrigerant availability and pricing for older systems will change over the next several years. Trousdale County homeowners whose AC systems are approaching the 10 to 15 year mark should factor refrigerant transition costs into their repair-versus-replace analysis.
In Hartsville, HVAC systems don't get a long off-season. Furnaces transition directly into AC season, with both systems seeing service demand across most of the calendar year. Trousdale County homeowners who maintain both annually carry lower per-year HVAC costs than those who wait for something to break.
Both heating and cooling systems face genuine seasonal demand in Hartsville: an estimated 3,220 heating degree days in winter and 2,260 cooling degree days in summer. With a median home age of 50 years in Trousdale County, a significant portion of local HVAC equipment is approaching end of design service life.