AC Installation in Hammond, IN
A new air conditioner in Hammond will run 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.
Three months of real work, then a long rest
Summers in Hammond hit average highs of 82°F, and your air conditioner only gets June through August to do its job, three months a year. It has to keep up on those hot afternoons, then sit idle the rest of the year.
Hammond has also logged 121 damaging wind events and 32 hail storms over the past ten years, with hail as large as 2.75 inches. Any central air conditioner installed new today has to meet a federal minimum of 13.4 SEER2, so whatever goes in will already meet that baseline.
- 3 months
- June through August, your air conditioner is on duty
- 82°F
- the average summer afternoon it cools against
- 32 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet

NOAA nClimDiv, 1991–2020 normals
Going above the federal minimum saves little here, about $20 a year.
Estimates for a typical Lake County home, from EIA household energy data, Indiana fuel prices and NOAA climate normals. Your home will differ.
In Indiana, HVAC licensing for homes is left to the counties and cities.
Lake County sets its own rule on who can do this kind of work, and there is no state license standing behind it. Whatever protection exists here comes from the county or city office, not from any statewide list a homeowner could check. Whether a license or registration is required for this job depends on which office covers the address.
For an air conditioner install, the piece that stands in for licensing is the permit. Most cities and counties require one before the new unit goes in, and an inspection once the work is done, and that inspection is what checks the installation was done right.
Sources: Indiana Department of Workforce Development · State of Indiana
- What size air conditioner does my house need?
- The right size depends on your square footage, your ceiling height, how much shade your house gets, and how well it holds cool air, not just floor space alone. A unit that's too big cools the house fast but shuts off before it pulls the moisture out of the air, leaving rooms cold and clammy. A contractor will measure the house and run a load calculation to land on the right tonnage for your specific home.
- Should I replace the whole system or just the outdoor unit?
- In most cases you replace both the outdoor unit and the indoor coil together. The two are matched to work at a certain capacity and efficiency, and pairing a new outdoor unit with an old coil usually means you lose the efficiency gains you paid for and can shorten the life of the new equipment. A contractor can look at the age and condition of your indoor coil and tell you whether it's a fit for a new outdoor unit.
- Do HVAC contractors in Hammond need a state license to work on my home?
- Indiana doesn't license HVAC contractors at the state level. It leaves that decision to counties and cities, so check whether Lake County requires a license before you hire anyone.


