HVAC Installation in Indianapolis, IN
A new system here will heat from October through May and cool from June through September every year. Tell us about the house, and a licensed contractor who covers Marion County will get in touch.
Tell us about the job
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Marion County asks a lot of both sides of your system
Your furnace has work to do from October through May. Winter nights average 23°F here, cold enough that a system has to hold steady for eight months straight, not just get through a few hard weeks. Come summer, afternoons average 83°F and the same system switches jobs and runs cooling from June through September. There is barely a month when a heating and cooling system in this county gets to sit idle.
55.6% of homes here heat with gas, and any new furnace installed today has to meet the federal minimum efficiency for gas furnaces. Power matters too. Indiana saw 17% of households lose power for 24 hours or more in 2024, and Marion County has logged 12 winter storms and 140 damaging wind events over the past ten years. A new install is worth planning around that, not just around the temperature.
- 8 months
- October through May, your system heats
- 4 months
- June through September, it cools
- 23°F
- the average winter night it heats against
- 83°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
In Indiana, HVAC licensing for homes is left to the counties and cities.
Marion County sets its own rule for who can do this work, since Indiana leaves HVAC licensing to cities and counties rather than testing and recording contractors at the state level. That means there is no statewide license to check here. Whatever standard applies to the contractor doing your installation comes from the county or city, not from Indianapolis.
What protects you on a job like this is the permit and inspection process. In most cities and counties, putting in a new furnace, air conditioner or heat pump needs a permit from the local building office, and the work gets inspected once it is done. That inspection is what catches a bad gas connection or a system that was not installed to code. It is not a license and it does not vouch for the contractor ahead of time, but it is the check this county has in place on the work itself.
Sources: Indiana Department of Workforce Development · State of Indiana
- When should I replace my HVAC system?
- Replace it when repairs stop making sense or the system can no longer keep up. A furnace or air conditioner that needs repairs more and more often is telling you something, especially once it's old enough that parts are wearing out across the board rather than one thing breaking at a time. Rising bills with no other cause, uneven heating between rooms, or a system that runs constantly without reaching the temperature you set are also signs of that. With heat needed here from October through May, a furnace that struggles in that stretch is worth replacing before the coldest nights arrive, not during them.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, replacing them together is often worth considering, but it's not required. A furnace and air conditioner installed at different times can still work fine side by side, since each one runs on its own thermostat call. The stronger case for doing both together comes up when they share an air handler or coil, or when one has already failed and the other is close behind it in age. A contractor looking at both systems can tell you whether pairing the work makes sense for your setup.
- What happens during an HVAC installation?
- A contractor starts by removing the old equipment and checking the ductwork, electrical connections, and venting that the new system will use. The new furnace, air conditioner, or both go in next, matched to the size of your home rather than just swapped in as a like-for-like box. Refrigerant lines get connected and sealed, gas and electrical hookups are tied in, and the system gets tested through a full heating and cooling cycle before the contractor leaves. Homes here need heat or cooling all 12 months of the year, so a working thermostat and a clean start-up matter from the day the job finishes.