HVAC Installation in Dover, DE
A new system here will heat from October through April and cool from June through September every year. Tell us about the house, and a licensed contractor who covers Kent County will get in touch.
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Eleven months of work a year for a new system in Dover
A new furnace here needs to handle winter nights that average 28°F from December through February, and it will run from October through April, seven months a year. The air conditioner takes over for the other four, working through summer afternoons that average 85°F. Between the two, a system in Dover is heating or cooling the house eleven months out of twelve.
Kent County has seen 10 winter storms and 120 damaging wind events over the past ten years, and 12% of Delaware households lost power for at least 24 hours in 2024. A new install is a chance to plan for that, whether that means asking about a generator hookup or just knowing how the system will come back on once power returns.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 28°F
- the average winter night it heats against
- 85°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
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. The license is issued to the contractor, not to a single job, so it means the person or company doing your installation was tested and is on record with the state. It does not mean the state inspects this particular furnace or air conditioner once it goes in.
That inspection comes from somewhere else. In most cities and counties, putting in a new furnace, air conditioner or heat pump needs a permit from the local building office, with an inspection once the work is done. That inspection is separate from the license, and it is where a local inspector looks over the finished installation.
Sources: Delaware Code Online · Delaware Division of Professional Regulation
- When should I replace my HVAC system?
- Replace it when repairs start costing more than they're worth or when the system can no longer keep up on the coldest or hottest days. If your system is heating or cooling unevenly, running constantly, or you've called for repair more than once this year, that's usually a sign the equipment is at the end of its life rather than a one-time fix. Homes here need heat from October through April and cooling from June through September, so a struggling system has little time of year to rest and recover. A contractor can look at the age and condition of your equipment and tell you whether repair still makes sense.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, it usually makes sense to replace them together. A furnace and air conditioner installed years apart often share a coil, a blower, or a duct connection, and mismatched equipment can run less efficiently or wear out sooner. If one system is much newer than the other, a contractor can tell you whether it makes sense to pair it with new equipment or replace it on its own later.
- What happens during an HVAC installation?
- A contractor removes the old equipment, sets the new furnace, air conditioner, or both in place, and connects them to the existing ductwork, gas line, electrical, and refrigerant lines. They check that the ducts are sized right for the new equipment, since ducts built for one system don't always move enough air for another. Once everything is connected, the contractor tests the system, checks refrigerant levels or gas pressure, and confirms it's heating or cooling the way it should before finishing the job. The exact steps depend on the equipment and the house, so a contractor can walk through what applies to yours.