Furnace Installation in Danville, IL
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Vermilion County will get in touch.
Tell us about the job
It takes about a minute.
Danville asks a lot of a furnace
Winter nights here average 21°F, and a furnace has to run from October through May, eight months of the year. That is most of the year spent cycling on and off to hold a house warm through the coldest nights.
53.9% of homes here heat with gas, and Vermilion County has seen 7 winter storms and 163 damaging wind events over the past ten years. Power can go out with the cold still outside, and 16% of Illinois households lost power for a full day or more in 2024. Any new gas furnace installed today has to reach at least 80.0 percent AFUE, the federal minimum, so whatever goes into your home will be built to hold up through winters like these.
- 8 months
- October through May, your furnace is on duty
- 21°F
- the average winter night it heats against
- 54%
- of homes here heat with gas, so most furnaces here burn gas
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A high-efficiency gas furnace would save about $120 a year to run in Vermilion County compared with a gas furnace.
Estimates for a typical Vermilion County home, from EIA household energy data, Illinois fuel prices and NOAA climate normals. Your home will differ.
In Illinois, HVAC licensing for homes is left to the cities and towns.
Vermilion County itself does not run a contractor licensing program, so whether the person in your basement is licensed depends on the city or town the house sits in. Some local governments there require one, some don't, and there's no state list that settles it either way. So the rule protecting you here comes from the address, not from a statewide standard.
What you can count on is the permit process. A furnace replacement in most cities and counties needs a permit from the local building office, and the work gets inspected once it's done. That inspection is what actually checks the gas connection and venting, the part of a furnace install that can hurt someone if it's done wrong. In a county where 53.9% of homes heat with gas, that's not a small detail.
Source: Illinois General Assembly
- What size furnace does my house need?
- The right size comes from a load calculation, not the square footage of your house alone. A contractor works through your insulation, windows, ceiling height, and layout to find the number, because two houses the same size can need different furnaces. With winter lows here averaging 21°F, an undersized furnace will run constantly and still fall short on the coldest nights. An oversized one cycles on and off too fast, which wears out parts sooner and leaves rooms uneven. Ask the contractor for the load calculation itself, not a guess based on the last furnace.
- How do I know it's time to replace my furnace?
- An aging furnace that needs more repair calls than it used to is worth replacing before it fails rather than after, especially if the same part keeps failing or a technician tells you the heat exchanger is cracked. Homes here need heat from October through May, eight months of the year, so a furnace that quits in the middle of that stretch leaves you without heat when you need it most. If yours is struggling, get it looked at before the next cold snap rather than during one.
- Is a high-efficiency furnace worth it?
- It depends on how much you heat and what your furnace is replacing. Furnaces built since November 2015 already have to hit 80 percent AFUE, so the real choice is between that and a higher-efficiency model above it. With heat needed here eight months a year and winter lows averaging 21°F, a furnace that runs that much of the year has more room to make up the difference in fuel used. A contractor can walk through the models available and what each one means for your specific house.