HVAC Quote & Repair Field Guides

Every guide below includes worked homeowner arithmetic and verified federal references from the U.S. EPA, Department of Energy (DOE), ENERGY STAR, and the IRS.

GUIDE 01

How to Read an HVAC Quote: Line Items, Missing Scope, and Red Flags

Audit permits, EPA 608 refrigerant recovery, line-set sizing, thermostat wiring, and plenum transitions before you sign.

GUIDE 02

The $5,000 Rule and 50% Rule Explained: Where Rules of Thumb Break

Why age × repair and the 50% replacement ratio work only as quick screening checks—and when holding-cost math overrides both.

GUIDE 03

R-22 Refrigerant Phase-Out: What It Means for Older AC Systems

EPA banned R-22 production and import on Jan 1, 2020. Learn how reclaimed supply, AIM Act R-410A phasedowns, and R-454B / R-32 change repair math.

GUIDE 04

SEER2 Explained: DOE Minimums, Real Bill Savings, and 2026 Rebates

Official DOE 10 CFR 430.32 regional minimums, ENERGY STAR heat pump thresholds, SEER vs. SEER2 math, and why expired 25C credits push focus to DSIRE.

GUIDE 05

How to Vet an HVAC Contractor: Licenses, Manual J, and Written Bids

Verify state licensing, demand an ACCA Manual J load calculation instead of square-foot guesswork, and compare parts vs. labor warranties.

GUIDE 06

Signs Your HVAC System Is Dying vs. Worth One More Repair

Separate immediate safety shutdowns and failed compressors from inexpensive wear items like capacitors, contactors, and condensate switches.

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