Furnace Installation in Lawton, OK
A new furnace here will run from November through April every year. Tell us about the house, and a licensed contractor who covers Comanche County will get in touch.
Tell us about the job
It takes about a minute.
Six months of heat, on nights that average 31°F
Lawton homes run the furnace from November through April. On the cold nights in that stretch, the average low is 31°F, so the burner is cycling on and off for most of the winter. A new furnace here needs to hold up over that whole stretch, not just the coldest week of it.
More than half of homes in the area heat with electricity, and the power here does not always stay on. A quarter of Oklahoma households went at least 24 hours without power in 2024, and the region has logged 14 winter storms and 148 damaging wind events over the past ten years. That is worth weighing when you choose a fuel type and a model. Any new non-weatherized gas furnace installed today also has to reach 80.0 percent AFUE, the federal minimum since November 2015.
- 6 months
- November through April, your furnace is on duty
- 31°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Oklahoma requires HVAC contractors to hold a state license.
The Construction Industries Board issues that license to the contractor, not to each job the contractor takes on. It means the state has tested this contractor's knowledge of the trade and keeps a record of who they are, so the license follows the business from one job to the next rather than getting reissued each time.
For a furnace installation in Comanche County, that license is what stands behind the person doing the work, but the local building office still has a role. Most cities and counties here require a permit for a furnace replacement and an inspection once the installation is finished, which checks that the venting, gas connection, and wiring were done correctly. That inspection is separate from the state license and comes from the local building office, not the Construction Industries Board.
Source: Oklahoma State Legislature
- What size furnace does my house need?
- It depends on your home's square footage, ceiling height, insulation, window count, and layout, so there's no single number that fits every house. A contractor works this out with a load calculation, not a chart based on square footage alone. Guessing on size backfires either way. Too big and the furnace short cycles, wearing out parts faster. Too small and it runs constantly through the cold months here without keeping up. Ask the contractor to walk you through the calculation for your house before they quote a unit.
- How do I know it's time to replace my furnace?
- Watch for a furnace that struggles to keep the house warm, cycles on and off more than it used to, or needs a repair call every winter. Rising energy bills with no other explanation point the same direction. Age matters too. A furnace installed before November 2015 may fall below the 80 percent AFUE minimum required now, so an older unit is likely burning more fuel to make the same heat. Homes here need heat from November through April, six months a year, so a furnace that's struggling has a long season to get through. If yours is already having trouble in fall, it's worth having it looked at before the coldest nights hit.
- Is a high-efficiency furnace worth it?
- A high-efficiency furnace burns less fuel to make the same heat, which matters most in places with a long, cold heating season. Winter nights here average 31°F from December through February, and homes need heat for six months of the year, so a more efficient furnace has real work to do rather than sitting idle most months. Over half the households here heat with electricity, so if yours is gas or you're considering a switch, ask the contractor to compare AFUE ratings for the units they're quoting. A contractor can also tell you whether your ductwork and venting suit a higher-efficiency model, since some require different venting than a standard furnace.