AC Installation in Dover, DE
A new air conditioner in Dover will run from June through September every year. Tell us about the house, and a licensed contractor who covers Kent County will get in touch.
Tell us about the job
It takes about a minute.
Four months of real heat, every year
Dover summers run June through September, with afternoons averaging 85°F. That is the stretch your air conditioner has to earn its keep, day after day, with no real break until fall.
A new system installed here has to be sized to handle that stretch, not just start it. If it is a new home unit built since 2023, it has to meet a federal minimum of 14.3 SEER2. Kent County has also seen its share of damaging wind over the past ten years, so where the outdoor unit sits and how it is secured matters as much as the equipment itself.
- 4 months
- June through September, your air conditioner is on duty
- 85°F
- the average summer afternoon it cools against
- 12 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 $10 a year.
Estimates for a typical Kent County home, from EIA household energy data, Delaware fuel prices and NOAA climate normals. Your home will differ.
Delaware requires HVAC contractors to hold a state license.
Delaware licenses HVAC contractors through the Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. That board tests and records who holds a license, and the license is issued to the contractor, not to each job, so it covers the person or business doing the work rather than this specific installation.
For an air conditioner installation, that license is what stands behind the person doing the work. In most cities and counties, an installation like this also needs a permit from the local building office and an inspection once the job is done, which checks the installation itself, separate from the contractor's license.
Sources: Delaware Code Online · Delaware Division of Professional Regulation
- What size air conditioner does my house need?
- The right size depends on your square footage, your insulation, how many windows you have and which way they face, and the layout of your ductwork. There's no shortcut for this. A contractor works it out with a load calculation, a room by room look at what's gaining heat and where, not a chart based on house size alone. A unit that's too big cools the air fast but never runs long enough to pull the humidity out, so the house feels clammy. Too small, and it runs constantly on those 85°F afternoons and still can't keep up.
- Should I replace the whole system or just the outdoor unit?
- In most cases, replace both the outdoor unit and the indoor coil together. The two are matched to work at a specific efficiency and capacity, and pairing a new condenser with an old coil usually means you lose the efficiency gain you paid for, sometimes voiding the manufacturer's warranty on top of it. If your furnace or air handler is also old, a contractor can tell you whether it's worth doing now or waiting. Age and condition of each piece matter more than doing it all at once just to do it.
- Do HVAC contractors in Dover need a state license to work on my home?
- Yes. Delaware requires HVAC contractors to hold a state license, issued by the Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Before hiring anyone, ask for their license number and check that it's current. This matters for warranty coverage too, since many manufacturers require licensed installation for the warranty to hold.