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The long answers behind a quote

What to look for on a quote, what size system a home needs, the 2026 refrigerant and efficiency rules, what's left of the rebates, and when a repair is the better buy. Every rule links to the agency that sets it.

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All guides

10 guides. Every one opens without a form.

  • Illustration of an HVAC contractor quote sheet with a magnifying glass enlarging two line items, a pen beside it and a checkmark shield on the corner
    Sep 30, 2026Replace

    How to read an HVAC quote, line by line

    A complete HVAC quote names every model number, the AHRI match, size, efficiency, permit and warranty. What each line should say, and which gaps are red flags.

    HVACFIND5 min · sources listed
  • Illustration of a balance scale weighing a repair wrench on one pan against a new outdoor AC condenser on the other
    Sep 30, 2026Replace

    Should you repair or replace your AC?

    Repair usually wins on a younger system with one failed part. Replace when the compressor or coil fails on an older unit, it runs on R-22, or repairs keep stacking up.

    HVACFIND4 min · sources listed
  • Side-by-side illustration of an outdoor heat pump blowing air and a gas furnace with a small flame, separated by a thermometer
    Sep 30, 2026Save

    Heat pump vs. gas furnace: which costs less to run?

    Compare the cost of a unit of heat: gas price over furnace efficiency, power price over heat pump COP. The break-even formula, a worked example, and when gas still wins.

    HVACFIND5 min · sources listed
  • Illustration of an outdoor AC condenser next to an efficiency gauge with the needle in the high zone and a green-energy leaf
    Sep 30, 2026Rules

    SEER2, EER2 and HSPF2: ratings and minimums explained

    SEER2 replaced SEER in 2023 under a tougher test. New split ACs need 13.4 SEER2 in the North and 14.3 in the South; split heat pumps need 14.3 SEER2 and 7.5 HSPF2.

    HVACFIND5 min · sources listed
  • Illustration of an older rose-colored refrigerant cylinder with an arrow pointing to a newer navy cylinder marked by a small caution triangle
    Sep 30, 2026Rules

    R-410A to R-454B: what the refrigerant change means

    New home AC and heat pump systems made since 2025 use lower-GWP refrigerants like R-454B or R-32. Pre-2025 R-410A stock can still be installed, and old systems repaired.

    HVACFIND4 min · sources listed
  • Illustration of a house with a heat pump outside, flanked by a calendar page with one day marked and a stack of coins with a blank rebate tag
    Sep 30, 2026Save

    HVAC rebates and tax credits in 2026: what’s left

    The 25C tax credit ended with 2025. What’s left in 2026: state HEEHR and HOMES rebates under new rules, utility rebates, manufacturer deals, and how to find yours.

    HVACFIND4 min · sources listed
  • Cutaway illustration of a single-story house measured with tape measures, with an outdoor AC unit sized to a bracket and the sun overhead
    Sep 30, 2026Replace

    What size AC do I need?

    AC size should come from a Manual J load calculation, not square footage. Rules like one ton per 500 sq ft ignore climate, insulation and windows, and often oversize.

    HVACFIND4 min · sources listed
  • Illustration of a clipboard with an approval seal, a rubber stamp, a hard hat and a house outline
    Sep 30, 2026Rules

    Do you need a permit to replace your HVAC?

    Replacing a furnace, AC or heat pump almost always needs a mechanical permit. Your contractor should pull it; fees are local, and the inspection checks safety and code.

    HVACFIND4 min · sources listed
  • Illustration of a contractor license ID card under a magnifying glass with a verified checkmark shield
    Sep 30, 2026Rules

    How to check an HVAC contractor’s license

    HVAC licensing is set state by state, and some states leave it to cities. Look up the license, confirm insurance, and ask for EPA 608 certification before you sign.

    HVACFIND4 min · sources listed
  • Illustration of an outdoor AC condenser surrounded by a ticked checklist clipboard, a pleated air filter, a spray bottle and a wrench
    Sep 30, 2026Repair

    HVAC maintenance checklist: what a tune-up includes

    A real tune-up checks electrical parts, coils, drain, refrigerant and airflow, plus burners and venting on a furnace. Change filters often; skip routine duct cleaning.

    HVACFIND4 min · sources listed

Second opinion

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