HVAC Installation in Hammond, IN
A new system here will heat from October through May and cool from June through August every year. Tell us about the house, and a licensed contractor who covers Lake County will get in touch.
Tell us about the job
It takes about a minute.
Hammond asks a system to run almost all year
Winter nights here average 20°F from December through February, and a new furnace has to hold that line for eight months, October through May. Summer is shorter but real, with afternoons averaging 82°F from June through August. Eleven months out of the year, a system here is doing one job or the other.
Most homes in the area heat with gas, so the furnace carries most of the load while the air conditioner covers the three warm months. The area has also logged 11 winter storms and 121 damaging wind events over the past ten years, and with 17% of Indiana households losing power for a day or more in 2024, a new system installed here should come back on its own once the power does.
- 8 months
- October through May, your system heats
- 3 months
- June through August, it cools
- 20°F
- the average winter night it heats against
- 82°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.
Indiana does not license HVAC contractors at the state level. Whatever rule applies in Lake County comes from the county or city itself, not from a state board, so there is no statewide list or exam behind the work.
For an installation like this, the protection comes from the permit process instead. Replacing a heating and cooling system needs a permit from the local building office in most places, and an inspection once the work is done. That inspection is what checks the job, not a license number.
Sources: Indiana Department of Workforce Development · State of Indiana
- When should I replace my HVAC system?
- Once repairs keep coming back, or a single repair costs a large share of what a new system would, replacement is usually the better move. An older furnace or air conditioner works harder to do the same job, and parts get harder to find as a unit ages. With heat needed here from October through May, a furnace that struggles to keep up is worth replacing before it fails on a 20°F night rather than after.
- Should I replace my furnace and air conditioner at the same time?
- Not necessarily, it depends on the condition of each one. A furnace and air conditioner installed years apart can still work fine as a pair as long as they're matched to work together. If your furnace is failing and your air conditioner still has years left in it, a contractor can size a new furnace to work with the existing coil rather than forcing you to replace both at once.
- What happens during an HVAC installation?
- A contractor removes the old equipment, then sets the new furnace, air conditioner, or both in place and connects them to your ductwork, gas line or electrical circuit, and the vent or flue. From there they connect the thermostat, check the refrigerant charge on the air conditioner, and run the system to confirm it's heating and cooling the way it should. A contractor will walk the specific job before pricing it, since what's involved depends on your existing ductwork and equipment.

