HVAC Repair or Replace Calculator
Got a steep HVAC repair bill or wondering whether your replacement quote is fair? Enter your numbers below to run four transparent, arithmetic-first checks in your browser—no signup, no phone number, and no contractor lead forms.
1. Your Quote Inputs
FORM HSO-01Second Opinion Audit
Enter your repair quote, replacement quote, system age, and refrigerant type on the left to generate a line-by-line decision sheet.
Or tap one of the sample cases above the form (e.g., “14-yr R-22 System” or “6-yr R-410A Repair”) to inspect how the four checks behave.
4 Checks That Will Run Automatically
| Check | Rule | Status |
|---|---|---|
| Check A | $5,000 rule (age × repair quote) | — Waiting |
| Check B | 50% rule (repair ÷ replacement quote) | — Waiting |
| Check C | Hard flag (age > 12 AND R-22 refrigerant) | — Waiting |
| Check D | Holding-cost comparison over your stay horizon | — Waiting |
Enter your quotes to run the 4 checks.
How This Second Opinion Works
Enter Your Two Quotes & System Age
Type the whole-dollar repair quote, a fully installed replacement quote, your unit’s age from its outdoor nameplate, and the refrigerant type.
Inspect All 4 Transparent Checks
Instead of hiding behind a black-box score, the worksheet shows the exact arithmetic for the $5,000 rule, 50% rule, R-22 phase-out flag, and holding-cost total.
Take 3 Targeted Questions to Your Tech
Use the generated contractor checklist—covering permits, Manual J sizing, line sets, and repair warranties—to catch missing scope before signing.
Verified Federal Reference Numbers (DOE, EPA, IRS)
| Topic | Verified Rule / Threshold | Source |
|---|---|---|
| Split AC Minimum (North) | 13.4 SEER2 (effective Jan 1, 2023) | DOE (10 CFR 430.32) |
| Split AC Minimum (SE / SW) | 14.3 SEER2 (<45k Btu/h) / 13.8 SEER2 (≥45k Btu/h) | DOE (10 CFR 430.32) |
| Split Heat Pump Minimum | 14.3 SEER2 / 7.5 HSPF2 nationwide | DOE (10 CFR 430.32) |
| ENERGY STAR Heat Pump | 15.2 SEER2 / 7.8 HSPF2 (version 6.1) | ENERGY STAR |
| R-22 Production & Import | Banned Jan 1, 2020 (new equipment banned since 2010) | U.S. EPA |
| Federal 25C Tax Credit | Expired Dec 31, 2025 (not available for 2026 installs) | IRS |
Frequently Asked Questions
What is the $5,000 HVAC repair or replace rule?
Multiply your HVAC system’s age in years by the repair quote in dollars. If the product exceeds $5,000, the rule of thumb leans toward replacement. We treat it as one reference check rather than a final verdict because labor and equipment costs vary across the United States.
When should I ignore the 50% rule on an HVAC repair?
If you plan to sell or move within 1–2 years, a brand-new system rarely pays back its full installed cost before you leave. As long as the unit is safe and does not rely on expensive R-22 recharges, repairing can still win on short holding-cost math even near or above 50%.
Why does an R-22 system over 12 years old trigger a replacement flag?
Under EPA Clean Air Act regulations, production and import of R-22 stopped completely on January 1, 2020, and new R-22 equipment was banned starting in 2010. Only recovered and reclaimed R-22 remains for servicing, making leak repairs expensive and risky on older units.
Is my HVAC quote too high if it does not list permits or a line set?
A low or vague lump-sum quote can actually hide extra costs or cut corners. Always ask whether municipal permits, EPA Section 608 refrigerant recovery and disposal, a new copper line set (especially when moving from R-22), thermostat wiring, and plenum transitions are included in writing.
What are the current federal SEER2 minimum efficiency standards?
Under U.S. Department of Energy rules effective January 1, 2023 (10 CFR 430.32), split-system central air conditioners require at least 13.4 SEER2 in the North and 14.3 SEER2 in the Southeast/Southwest below 45,000 Btu/h (13.8 SEER2 at or above 45,000 Btu/h). Split-system heat pumps require 14.3 SEER2 and 7.5 HSPF2 nationwide.
Is the federal 25C HVAC tax credit available for 2026 installations?
No. According to IRS rules, the Energy Efficient Home Improvement Credit (Section 25C — 30% up to $2,000 per year for qualifying heat pumps) applied only to property placed in service on or before December 31, 2025, and expired for 2026 installations. Check DSIRE for active state and local utility rebates.
How do I tell if a contractor sized my replacement quote properly?
Ask to see an ACCA Manual J heat-gain and heat-loss calculation for your actual home rather than a rough square-footage rule of thumb. Oversized equipment short-cycles, raises humidity, and wears out compressors prematurely.
HVAC Quote & System Field Guides
Every guide includes a worked homeowner example and primary-source numbers from EPA, DOE, ENERGY STAR, and the IRS.
Audit permits, EPA 608 refrigerant recovery, line-set sizing, thermostat wiring, and plenum transitions before you sign.
GUIDE 02Why age × repair and the 50% replacement ratio work only as quick screening checks—and when holding-cost math overrides both.
GUIDE 03EPA 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 04Official 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 05Verify state licensing, demand an ACCA Manual J load calculation instead of square-foot guesswork, and compare parts vs. labor warranties.
GUIDE 06Separate immediate safety shutdowns and failed compressors from inexpensive wear items like capacitors, contactors, and condensate switches.