Heating and air conditioning in Chester County, PA: newer homes and what to check
Updated · KeystoneProGuide editorial team
What sets Chester County apart for heating and cooling?
Its housing is the newest and the largest in the five-county area. The Census Bureau estimates that 10.7 percent of Chester County's 212,491 housing units were built since 2010, the highest share of the five counties and well above the state's 6.1 percent. The median home has 7.0 rooms, also the highest of the five, and 73.0 percent have three or more bedrooms. Only 12.6 percent of homes were first built in 1939 or earlier, against 25.0 percent statewide.
The county's planning commission says around 1,500 new housing units have been added in most years since 2010, and that new single-family detached houses have declined while twins and apartments have increased. In 2025 it counted the most new units in Downingtown, West Brandywine, West Goshen, East Brandywine and East Whiteland.
How are Chester County homes heated?
With a mix that leans less on gas than the region does. The Census Bureau's Chester County profile gives these shares for the county's 204,774 occupied homes:
| Main heating fuel | Chester County | Pennsylvania |
|---|---|---|
| Gas | 47.7% | 56.4% |
| Electricity | 31.1% | 25.3% |
| Fuel oil or kerosene | 18.3% | 14.0% |
| Other fuels | 2.5% | 3.8% |
Electricity heats 31.1 percent of homes, the highest share among the five counties, and oil heats 18.3 percent, second only to Bucks. Electric heat covers several kinds of equipment, from baseboard heaters to heat pumps, and the Census figures do not separate them.
What does a newer house mean for HVAC work?
Three practical things.
- The warranty may still be running. If your system went in within the last several years, find the paperwork before you call for a repair. The Federal Trade Commission notes that some warranties require you to have returned a registration card to qualify for service, and that coverage may depend on maintaining the product as directed.
- Builder work is not home improvement work. Pennsylvania's Attorney General says the construction of a new home is not a home improvement under the state's contractor registration law. Once you own the house, a contractor replacing or adding equipment is doing home improvement work and must generally be registered. The state's contractor search shows whether a company is.
- The original sizing deserves a second look at replacement. ENERGY STAR says the right size comes from a calculation of the house's actual needs, and that oversized equipment may cycle too often and wear out sooner. A replacement is the moment to ask for that calculation, especially in a large house.
Is a heat pump a fit in Chester County?
For many of the county's electric-heat and oil-heat homes it is at least worth pricing. ENERGY STAR says heat pumps can lower bills for homes switching from electric resistance, propane or oil, and that a ducted heat pump can often replace a central air conditioner or furnace as a drop-in replacement using the existing ducts. Where winters regularly dip below freezing, it advises asking for a cold-climate model; its cold-climate criteria require a heat pump to keep at least 70 percent of its heating capacity at 5°F. The contractor should also discuss whether you need back-up heat for the coldest days.
Who issues permits, and how do you check a contractor?
Permits are local. Under the state's construction code regulation it is your own township's or borough's building code official who issues the permit to install or replace a mechanical system. Ask the contractor who will pull the permit and when the inspection will be.
No county consumer protection office for Chester County was found in the research for this guide, so the state is the main route: check the registration number with the Attorney General and take complaints there. How registration works is in what Pennsylvania requires of HVAC contractors, and published national prices are in the cost guide. Businesses serving the county are on the Chester County HVAC contractors page.
Sources
- 2020-2024 ACS 5-Year Narrative Profile: Chester County, Pennsylvania, U.S. Census Bureau
- 2020-2024 ACS 5-Year Narrative Profile: Pennsylvania, U.S. Census Bureau
- 2020-2024 ACS 5-Year Narrative Profile: Bucks County, Pennsylvania, U.S. Census Bureau
- 2020-2024 ACS 5-Year Narrative Profile: Delaware County, Pennsylvania, U.S. Census Bureau
- 2020-2024 ACS 5-Year Narrative Profile: Montgomery County, Pennsylvania, U.S. Census Bureau
- 2020-2024 ACS 5-Year Narrative Profile: Philadelphia County, Pennsylvania, U.S. Census Bureau
- Housing Report - Units By Type, Chester County Planning Commission
- Air-Source Heat Pumps, ENERGY STAR
- Heat Pump Equipment Key Product Criteria, ENERGY STAR
- HVAC Quality Installation, ENERGY STAR
- Warranties, Federal Trade Commission
- Frequently Asked Questions: Home Improvement Contractor Registration, Pennsylvania Office of Attorney General
- 34 Pa. Code § 403.62. Permit requirements and exemptions., Commonwealth of Pennsylvania (Pennsylvania Code)
- Home Improvement Contractor Search, Pennsylvania Office of Attorney General