AC Installation in Centreville, MD
A new air conditioner in Centreville will run from June through September every year. Tell us about the house, and a licensed contractor who covers Queen Anne's County will get in touch.
Tell us about the job
It takes about a minute.
Four months of real heat, every year
Centreville summers average 86°F on a June through September afternoon, and that is the stretch your air conditioner has to cover, four months a year. A new system needs to be sized for that kind of heat, not just a mild stretch of it.
Any central air conditioner installed new today has to meet 14.3 SEER2, the federal efficiency minimum that took effect in 2023. That is the floor, not a feature, so it is worth asking what you are getting above it.
- 4 months
- June through September, your air conditioner is on duty
- 86°F
- the average summer afternoon it cools against
- 10 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Going above the federal minimum saves little here, about $20 a year.
Estimates for a typical Queen Anne's County home, from EIA household energy data, Maryland fuel prices and NOAA climate normals. Your home will differ.
Maryland requires HVAC contractors to hold a state license.
The Maryland Board of Heating, Ventilation, Air Conditioning, and Refrigeration (HVACR) Contractors tests and licenses the contractor, not the job. That means the person or company doing the work has already been through the state's process before they ever get to your house. The license sits with them, not with this particular installation.
In most cities and counties, an air conditioner installation like this one needs a permit from the local building office and an inspection once the work is done. That inspection is what checks the new unit was put in correctly. The license is what qualified the contractor to be the one doing it.
Sources: Maryland General Assembly · Maryland Department of Labor
- What size air conditioner does my house need?
- The right size depends on your square footage, ceiling height, how much shade and window area you have, and how well your attic and walls are insulated. A unit that's too big will cool the room fast but shut off before it pulls the humidity down, so the air feels damp. A unit that's too small will run nonstop on an 86°F afternoon and still not keep up. A contractor works this out with a load calculation, not a rule of thumb based on square footage alone, so plan on that assessment before you settle on a size.
- Should I replace the whole system or just the outdoor unit?
- If your indoor coil and outdoor unit are matched and both still in good shape, replacing just the outdoor unit can work. But the indoor coil and the outdoor condenser are engineered to run together, and pairing a new condenser with an old coil often means you lose efficiency and put more strain on the new compressor. Age matters too. If the indoor coil is old enough that it's due for its own replacement soon, doing both at once can make more sense than replacing one piece now and the other later. A contractor can look at what's installed now and tell you whether the coil is a match for a new outdoor unit.
- Do HVAC contractors in Centreville need a state license to work on my home?
- Yes. Maryland requires HVAC contractors to hold a state license, issued through the Maryland Board of Heating, Ventilation, Air Conditioning, and Refrigeration Contractors. The license is held by the contractor, not tied to any single job, so installing your air conditioner falls under that same requirement. Most counties also require a permit for the installation and an inspection once the work is finished, so ask whether that's included when you get a quote.