AC Installation in Lisbon, ND
A new air conditioner in Lisbon will run from June through August every year. Tell us about the house, and a licensed contractor who covers Ransom County will get in touch.
Tell us about the job
It takes about a minute.
Three short months, and hail to plan around
Summers around Lisbon are short. Homes here only need cooling from June through August, with afternoons averaging around 80°F. A new air conditioner does not have to fight extreme heat for long, but it still has to be sized right for those three months.
Ransom County has logged 28 hail events and 46 damaging wind events over the past ten years, with hail up to 2 inches. That is worth knowing when you are placing an outdoor unit. Any new central air conditioner installed now has to meet a federal minimum of 13.4 SEER2.
- 3 months
- June through August, your air conditioner is on duty
- 80°F
- the average summer afternoon it cools against
- 28 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 $10 a year.
Estimates for a typical Ransom County home, from EIA household energy data, North Dakota fuel prices and NOAA climate normals. Your home will differ.
North Dakota requires HVAC contractors to hold a state license.
North Dakota licenses HVAC contractors through the Secretary of State. That license covers the contractor, not each individual job. Work under $4,000 does not need a licensed contractor, so whether this rule applies to your installation depends on where the final cost lands.
If the job comes in at $4,000 or more, the license is the thing accountable for the work. Either way, most cities and counties require a permit for an air conditioner installation and an inspection once it is done. That inspection is what catches a bad connection or a wiring mistake, the part of this job worth having checked.
Sources: North Dakota Legislative Branch · North Dakota Secretary of State
- What size air conditioner does my house need?
- There is no fixed answer without a contractor looking at your house. Sizing comes down to square footage, ceiling height, how much shade the house gets, how many windows it has and where they face, and how well the attic and walls hold heat in. Lisbon summers only push into the 80s, so a unit sized for a much hotter climate would be oversized here, and an oversized unit cools the air fast without running long enough to pull the humidity out. A contractor will run a load calculation on the actual house rather than guess off square footage alone.
- Should I replace the whole system or just the outdoor unit?
- If the indoor coil and outdoor unit are different ages or different efficiency ratings, replacing just the outdoor unit usually is not a good match. The two are matched at the factory to work together, and pairing a new outdoor unit with an old indoor coil can mean the system never reaches the efficiency either piece is rated for. Age matters too. If the indoor coil is old enough that it could fail within a year or two of the new outdoor unit going in, most contractors will recommend doing both now. A contractor can check the coil condition and the match before deciding.
- Do HVAC contractors in Lisbon need a state license to work on my home?
- Yes, North Dakota requires HVAC contractors to hold a state license, issued through the Secretary of State. The license belongs to the contractor, not to any single job. Some smaller jobs fall outside that requirement under state rules, but a contractor can tell you where an air conditioner installation falls. Most cities and counties also require a permit and an inspection once the installation is done, separate from the contractor's license.