# Vegas HVAC Help > Las Vegas valley heating and air-conditioning rules from official sources: change out permits in Clark County and the City of Las Vegas, the Nevada C-21 license, refrigerant rules, renter rights and complaints. Information only. A free information site from Local Help Stations. Not an HVAC company or government office. Contact: call (888) 477-1121 (calls only) or email requests@localhelpstations.com. ## How to cite Plain credit line for quotes from this site: Source: Vegas HVAC Help (vegashvachelp.com), part of the Local Help Stations network (localhelpstations.com). Page URLs follow https://vegashvachelp.com// . Link the page you used. Each page shows the date it was last updated or checked. ## Key facts - AC contractors are licensed in Nevada classification C-21 (C-21b Air-conditioning). Source: https://www.leg.state.nv.us/NAC/NAC-624.html#NAC624Sec380 (checked 2026-11-02) - Clark County requires a permit for every AC change out, even like for like. Source: https://www.clarkcountynv.gov/government/departments/building___fire_prevention/how-do-i (checked 2026-11-02) - The under $1,000 handyman exemption never covers refrigeration, heating or air-conditioning work. Source: https://www.leg.state.nv.us/NRS/NRS-624.html#NRS624Sec031 (checked 2026-11-02) - A Nevada landlord who fails to restore air-conditioning has 48 hours after written notice before tenant remedies apply. Source: https://www.leg.state.nv.us/NRS/NRS-118A.html#NRS118ASec380 (checked 2026-11-02) - EPA rules prohibit intentionally venting refrigerant. Source: https://www.epa.gov/section608/prohibition-venting-refrigerants (checked 2026-11-02) - A deposit on an owner-occupied home may not exceed $1,000 or 10 percent, whichever is less. Source: https://www.leg.state.nv.us/NRS/NRS-624.html#NRS624Sec970 (checked 2026-11-02) ## Pages - [What license does a Las Vegas HVAC contractor need?](https://vegashvachelp.com/license-rules/): The Nevada C-21 refrigeration and air-conditioning classification. - [Who can repair or replace an AC system in Nevada?](https://vegashvachelp.com/repair-vs-replacement/): What the C-21d maintenance license covers and what needs a full C-21b. - [Do I need a permit to replace an AC unit in Las Vegas?](https://vegashvachelp.com/permits/): HVAC permit rules in Clark County and the City of Las Vegas. - [HVAC work that needs no permit in Las Vegas](https://vegashvachelp.com/no-permit-hvac/): The City of Las Vegas homeowner guide list of mechanical work without a permit. - [Duct work permits in Las Vegas](https://vegashvachelp.com/duct-work/): When moving or adding ducts needs a permit. - [Refrigerant rules for Las Vegas AC repairs](https://vegashvachelp.com/refrigerant-rules/): Federal EPA Section 608 venting and technician certification rules. - [Getting rid of an old AC unit in Las Vegas](https://vegashvachelp.com/ac-disposal/): Refrigerant recovery and Republic Services disposal rules. - [Evaporative cooler rules in Las Vegas](https://vegashvachelp.com/evaporative-coolers/): License class and permit rules for swamp coolers. - [Dryer vents and exhaust fans in Las Vegas](https://vegashvachelp.com/ventilation-and-exhaust/): Dryer vent length rules and exhaust fan permits. - [HVAC inspections in Las Vegas](https://vegashvachelp.com/inspections/): Access, expiration, re-inspection fees and second opinions. - [Air conditioning problems in a Las Vegas rental](https://vegashvachelp.com/renters/): What Nevada landlord tenant law says about repairs and essential services. - [How to check a Las Vegas HVAC contractor's Nevada license](https://vegashvachelp.com/check-a-contractor/): Look up a HVAC contractor on the State Contractors Board license search and read their ads the way the law requires. - [Can a handyman do HVAC work in Nevada?](https://vegashvachelp.com/handyman-exemption/): The under $1,000 repair exemption in NRS 624.031 and why it rarely covers HVAC. - [What happens if an unlicensed HVAC contractor works in Nevada?](https://vegashvachelp.com/unlicensed-contractor-penalties/): Void contracts, criminal penalties and Board fines for unlicensed contracting. - [What must a Nevada HVAC contract include?](https://vegashvachelp.com/residential-contracts/): The written contract rules in NRS 624.970 for owner-occupied single-family homes. - [How much deposit can a Nevada HVAC contractor ask for?](https://vegashvachelp.com/deposits-and-payments/): Deposit caps, progress payments, receipts and refunds after abandonment. - [The Nevada Residential Recovery Fund](https://vegashvachelp.com/recovery-fund/): Who can get paid back after a licensed contractor's violation, and the deadline. - [How to file a complaint about a Las Vegas HVAC contractor](https://vegashvachelp.com/file-a-complaint/): The Nevada State Contractors Board complaint process and deadline. - [Cancelling a HVAC deal signed at your door in Nevada](https://vegashvachelp.com/door-to-door-sales/): The 3 business day right to cancel door-to-door sales under NRS 598. - [Doing your own HVAC work in Las Vegas](https://vegashvachelp.com/owner-builder/): The Nevada owner-builder exemption and what it means for permits and the Recovery Fund. ## Cities - [Las Vegas valley building departments](https://vegashvachelp.com/cities/) - [Unincorporated Clark County: hvac permits](https://vegashvachelp.com/cities/clark-county/): HVAC permits in Unincorporated Clark County, plus Nevada license and contract rules, from official sources. - [City of Las Vegas: hvac permits](https://vegashvachelp.com/cities/city-of-las-vegas/): HVAC permits in City of Las Vegas, plus Nevada license and contract rules, from official sources. - [City of Henderson: homeowner permits](https://vegashvachelp.com/cities/henderson/): Homeowner permits in Henderson, plus Nevada license and contract rules, from official sources. - [FAQ](https://vegashvachelp.com/faq/) - [Sources](https://vegashvachelp.com/sources/) - [About](https://vegashvachelp.com/about/) - [Contact](https://vegashvachelp.com/contact/)