Serving Mays Chapel and Baltimore 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 Mays Chapel 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. Baltimore County homeowners whose AC systems are approaching the 10 to 15 year mark should factor refrigerant transition costs into their repair-versus-replace analysis.
Baltimore County sees real demand from both heating and cooling systems across the year. Furnaces carry the load through winter, AC systems take over from late spring through early fall, and the shoulder seasons are the right time to service each before peak demand arrives.
Mays Chapel sees approximately 2,190 cooling degree days in summer and 3,060 heating degree days in winter, with real seasonal demand on both systems. Baltimore County homes built around 1972 — the local median — are at the age where original HVAC equipment is entering the replacement planning window.