HVAC Installation in Cincinnati, OH
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 Hamilton County will get in touch.
Tell us about the job
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What Hamilton County asks of a new system
Your new furnace will run October through April, seven months of the year, with winter nights averaging 25°F. Your air conditioner covers June through September, four months, on afternoons that average 85°F. Between the two, a system here is working eleven months out of the year.
That kind of run time makes the equipment you choose matter. Any new furnace or AC sold today has to meet a federal minimum efficiency standard, so the baseline is already higher than what an older system was built to. Worth asking too how a new system holds up when the power goes out. Hamilton County has logged 16 winter storms and 169 damaging wind events over the past ten years, and statewide, 18% of households went at least a day without power in 2024.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 25°F
- the average winter night it heats against
- 85°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
In Ohio, HVAC licensing for homes is left to the counties.
In Hamilton County, whether your contractor is licensed depends on the local rules where the house sits, not on any statewide list. Ohio's definition of a home contractor calls for at least $250,000 in liability insurance, but that is a definition of the term, not a credential the state checks or issues.
For a furnace and air conditioner installation, the protection here comes from the permit process rather than a license. In most cities and counties, replacing a heating and cooling system needs a permit from the local building office, and the finished work gets an inspection. That inspection is what checks the gas connections and the rest of the install, since a bad connection is the dangerous part of this job.
Source: Ohio Legislative Service Commission
- When should I replace my HVAC system?
- Replace it when repairs start happening every year, or when a contractor tells you the heat exchanger or compressor is failing. At that point another repair usually costs you more in the long run than moving to a new unit. Homes here need heat from October through April and cooling from June through September, so there are only a few weeks a year when either system can sit idle without you noticing. If your furnace or air conditioner is old enough that you are wondering, that is worth a contractor's opinion before it fails on its own schedule instead of yours.
- Should I replace my furnace and air conditioner at the same time?
- If both are close in age, yes, it usually makes sense to replace them together. A furnace and air conditioner installed at the same time are matched to work as one system, and pairing an old furnace with a new air conditioner, or the other way around, can mean one of them is doing extra work to keep up with the other. It also means one visit instead of two. That said, if one unit is several years newer than the other and still running fine, a contractor can size a new unit to work with what you are keeping.
- What happens during an HVAC installation?
- A contractor removes the old furnace and air conditioner, or whichever units are being replaced, and sets the new equipment in place. This includes connecting it to the existing ductwork, running the refrigerant lines and wiring, and venting the furnace properly. Once everything is connected, the contractor tests the system, checks refrigerant levels and airflow, and walks through the thermostat and any settings with you. The exact steps depend on whether the ductwork, electrical panel, or venting need any changes to match the new equipment, which is something a contractor will assess for your house.