HVAC guide · Las Vegas
HVAC in Las Vegas: a homeowner’s guide to heating and cooling
In Las Vegas your HVAC system works hard in both directions: long, extreme summers for cooling and cold desert nights in winter for heating. This guide explains the main system types, the efficiency rules for new equipment in Nevada, a simple maintenance calendar, when you need a permit and how to hire a licensed contractor.
1. The systems you will find in Las Vegas homes
- Central air conditioner with a gas furnace: the outdoor unit cools in summer; a furnace, usually on natural gas, heats in winter.
- Heat pump: one system that cools in summer and reverses to heat in winter, running on electricity.
- Package units: cooling (and sometimes heating) in a single cabinet, often on the roof or beside the house.
- Ductless mini-splits: used for additions, garages or rooms the main system does not reach well.
Which one is best depends on your home, your ductwork and your energy costs. A licensed contractor can compare options for your house.
2. Efficiency rules for new AC systems in Nevada
Nevada is part of the U.S. Department of Energy’s Southwest region. Since January 1, 2023, a new split-system central air conditioner with less than 45,000 Btu/h of cooling capacity installed in this region must meet at least 14.3 SEER2 and an EER2 of 11.7/9.8; larger units must meet 13.8 SEER2 and an EER2 of 11.2/9.8. The DOE states that it is illegal for a contractor to install a system that does not meet the regional standard (DOE 2023 standards FAQ).
SEER2 measures seasonal cooling efficiency; EER2 measures efficiency at high outdoor temperatures, which matters a lot in Las Vegas. Higher numbers mean lower cooling costs.
3. A simple maintenance calendar
- Spring: cooling check before the heat — clean outdoor coil, clear condensate drain, airflow and refrigerant charge checked by a licensed technician.
- Summer: check the air filter often. Long run times and desert dust clog filters faster.
- Fall: heating check before the first cold nights, especially for gas furnaces (see our heating repair guide).
- All year: keep the outdoor unit clear of weeds, debris and stored items.
Gas safety: if you smell gas, leave the area immediately and, from a safe location, call 911 and Southwest Gas at 877-860-6020 (Southwest Gas).
4. Indoor air in the desert
Dust and pet hair load up filters quickly in Las Vegas. Use the filter size your system requires, replace it on schedule, and ask your contractor before switching to a much denser filter: some systems lose airflow with filters they were not designed for.
5. Permits in Las Vegas and Clark County
- City of Las Vegas: a permit is required to install or change any part of a heating or cooling system; portable units and minor part replacements are among the exceptions (City of Las Vegas, “When do I need a permit?”).
- Unincorporated Clark County (for example Spring Valley, Enterprise or Paradise): the county issues residential mechanical permits for AC and furnace replacements, one appliance per permit (Clark County simple permits).
Your contractor usually pulls the permit. Ask who is responsible before the work starts. In Henderson, see our Henderson guide.
6. How to hire a licensed HVAC contractor
- Verify the license in the free Nevada State Contractors Board license search. HVAC work is contractor work in Nevada even for jobs under $1,000 (NRS 624.031).
- Look for the license number in the ad (NRS 624.720).
- For a new system, ask for the SEER2 and EER2 ratings in writing and confirm they meet the Southwest standard.
- Get the price, the warranty and the permit responsibility in writing before work begins.
Frequently asked questions
What efficiency rating does a new AC need in Las Vegas?
Nevada is in the Department of Energy's Southwest region. Since January 1, 2023, a new split-system central air conditioner under 45,000 Btu/h installed there must meet at least 14.3 SEER2 and an EER2 of 11.7/9.8, and it is illegal for a contractor to install a system that does not meet the regional standard.
Do I need a permit to replace my HVAC system in Las Vegas?
Usually yes. The City of Las Vegas says a permit is required to install or change any part of a heating or cooling system, and Clark County issues residential mechanical permits for AC and furnace replacements, one appliance per permit. Your licensed contractor normally pulls the permit.
When should I service my HVAC system in Las Vegas?
A common approach is a cooling check in spring, before the summer heat, and a heating check in fall, before the first cold nights. Change the air filter more often when the system runs a lot or there is more dust.
What should I do if I smell gas near my furnace?
Leave the area immediately. From a safe location, call 911 and Southwest Gas at 877-860-6020. Do not turn switches, thermostats or appliances on or off.
Also see: Emergency AC guide · AC repair in Henderson · Heating repair guide · AC repair in Las Vegas · Las Vegas (en español) · Blog