# HVAC guides

HVAC Pros has 8 guides on HVAC contractors for maintenance plans, AC repair, furnace repair, and installation, grouped by country.

## General

- [AC repair costs: how to compare a quote](https://hvacpros.fyi/guides/ac-repair-costs.md): Use dated US estimates to frame a repair discussion. Get a diagnosis and itemized local quote.
- [EPA Section 608 refrigerant rules for property owners](https://hvacpros.fyi/guides/epa-608-refrigerant-rules.md): Check the technician credential separately from the business license before US refrigerant work.
- [Furnace replacement costs and quote checklist](https://hvacpros.fyi/guides/furnace-replacement-costs.md): Separate furnace equipment, installation work and exclusions before you compare replacement offers.
- [How often should you service an HVAC system?](https://hvacpros.fyi/guides/how-often-to-service-hvac.md): Plan seasonal heating and cooling service. Know what to ask a contractor to inspect.
- [How to check an HVAC license by state](https://hvacpros.fyi/guides/how-to-check-hvac-license-by-state.md): Find the right register, match the business identity and confirm the scope before you hire.
- [How to choose an HVAC contractor](https://hvacpros.fyi/guides/how-to-choose-hvac-contractor.md): Compare license evidence, written scopes and service records before approving heating or cooling work.
- [What do HVAC maintenance plans cost?](https://hvacpros.fyi/guides/hvac-maintenance-plan-costs.md): Compare dated US price estimates with the actual work and exclusions in a maintenance agreement.
- [SEER2 and efficiency rules: what to ask before replacement](https://hvacpros.fyi/guides/seer2-and-efficiency-rules.md): Understand the rating change and request proof that the quoted system fits the installation location.