Furnace Installation in Stephens City, VA
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Frederick County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, and nights that drop to 25°F
From October through May your furnace has to keep the house warm. That's eight months a year. Winter nights here average 25°F, and that's the cold it answers most nights, not just the worst ones.
Half the homes in the area heat with electricity, and the power here doesn't always stay on through a storm. In 2024, 22 percent of Virginia households lost power for at least 24 hours. The last ten years brought 16 winter storms and 134 damaging wind events through the area. A new furnace has to hold up through all of that. If it runs on gas, federal rules already set the floor. Any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE.
- 8 months
- October through May, your furnace is on duty
- 25°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Virginia requires HVAC contractors to hold a state license.
Virginia's Board for Contractors licenses the contractor, not the job. That license covers the person or company doing the work, tested and on record with the state, and it stays with them from one job to the next. The state does carve out an exception for small work. Jobs under $1,000 do not need a licensed contractor. A furnace installation runs well past that line.
Because Virginia licenses this trade, the license is what stands behind the work here. Most cities and counties also require a permit before a furnace gets replaced, with an inspection once the work is done. That inspection is separate from the license. It is the point where someone checks the gas connection and the rest of the install before it is signed off.
Sources: Virginia General Assembly · Virginia Department of Professional and Occupational Regulation
- What size furnace does my house need?
- The right size depends on your square footage, how well your house is insulated, your window count, and your ceiling height, so there's no single answer that fits every home. A contractor works this out with a load calculation, not a quick rule of thumb based on square footage alone. Too big and the furnace short cycles, wearing out parts faster and leaving rooms uneven. Too small and it runs constantly through the cold nights here and still can't keep up.
- How do I know it's time to replace my furnace?
- Age is the first sign. Once a furnace gets old, parts get harder to find and it runs less efficiently than a new one would. Watch for rising repair calls, uneven heat between rooms, or a furnace that runs longer to hit the same temperature it used to reach faster. Homes here need heat from October through May, eight months a year, so a furnace on its last legs is a bigger risk than in places where it barely gets used.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what your current furnace costs to run. Every non-weatherized gas furnace made since November 2015 has to hit at least 80 percent AFUE, so even a standard new furnace is already fairly efficient. High-efficiency models push past that baseline, which matters more here than in milder climates since your furnace is working eight months out of the year. A contractor can look at your current unit and your house to say whether the difference pays for itself.