HVAC Installation in Brookings, SD
A new system here will heat from September through May and cool from June through August every year. Tell us about the house, and a licensed contractor who covers Brookings County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, three months of cooling
Winter nights in Brookings County average 8°F from December through February. A new furnace has to bring the house back up from that, night after night, from September through May. Summer asks less of it, just three months, with afternoons averaging 79°F, but the same equipment has to handle both ends.
Brookings County has recorded 34 winter storms and 77 damaging wind events over the past ten years. Whatever gets installed should hold up to that kind of winter, not just an ordinary cold night. 44.9% of homes here heat with gas, so the installer sizing your system needs to know what you're running now and what it takes to keep the house warm through those nine months and cool through the other three.
- 9 months
- September through May, your system heats
- 3 months
- June through August, it cools
- 8°F
- the average winter night it heats against
- 79°F
- the average summer afternoon it cools against

NOAA nClimDiv, 1991–2020 normals
In South Dakota, HVAC licensing for homes is left to the cities and towns.
That means the rule for a contractor working in Brookings County depends on the city or town the house is in, not on the county. Some cities license or register HVAC contractors, others leave it alone, and South Dakota keeps no statewide test or record to check either way.
For an installation, the protection here comes from the permit process rather than a license. 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 finished work gets an inspection before it is signed off. That inspection is what catches a bad gas or electrical connection on this job, and it happens at the local level, not the state.
Source: South Dakota Legislature
- When should I replace my HVAC system?
- Replace it when repairs start costing more than they're worth, or the system can't keep the house comfortable anymore. An aging furnace or air conditioner breaks down more often, and each repair is money you lose once the unit fails for good. With winter nights averaging 8°F here from December through February, a furnace that struggles or short cycles in that cold is worth replacing before it quits on the coldest night of the year. If your energy bills have crept up with no other explanation, that's often a sign the system is losing efficiency as it ages.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, it usually makes sense to replace them together. Furnaces and air conditioners installed at the same time tend to wear out around the same time too, so if your furnace is failing, your air conditioner is probably not far behind. Replacing them together also lets a contractor match the two units to work well as a pair. That said, if one is much newer than the other, there's no need to replace a unit that still has years left in it.
- What happens during an HVAC installation?
- A contractor removes the old equipment, sets the new furnace, air conditioner or heat pump in place, and connects it to your ductwork, gas line or electrical circuit and refrigerant lines as needed. They'll check the ducts for leaks or sizing problems, since a new system connected to bad ductwork won't perform the way it should. Once it's running, they test it, check refrigerant charge or gas pressure, and walk you through the thermostat and any new controls. Most cities and counties here require a permit for this work and an inspection once it's done, so check with your local building office about what applies to your address.

