Serving Lansdowne and Loudoun 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 Lansdowne 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. Loudoun County homeowners whose AC systems are approaching the 10 to 15 year mark should factor refrigerant transition costs into their repair-versus-replace analysis.
Loudoun County's mixed-humid climate means both heating and cooling systems are load-bearing. An AC that underperforms in August and a furnace that struggles in January aren't unrelated problems — they're the result of the same deferred maintenance pattern that costs Lansdowne homeowners more over time.
The combination of 2,130 annual cooling degree days and 3,050 heating degree days means Lansdowne homeowners depend on both systems across the year. Loudoun County's housing stock, with a median construction year around 1975, contains a large inventory of equipment due for evaluation or replacement.