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Decision Tool · Same-Scope Comparison

HVAC Quote Comparison Checklist

A printable 16-point decision worksheet designed to normalize heating and cooling bids. Never compare contractor price per ton until every underlying specification—from ACCA Manual J load sizing and AHRI certificates to line set scope, condensate float switches, plenum mastic seals, and labor warranties—is verified on an identical scope.

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Updated: 2026-11-07 • Standard Form V1.0 • Zero Referral Affiliation
The Golden Rule: Compare $/ton ONLY where scope is identical.

An HVAC quote showing $2,200 per ton ($6,600 total) is not cheaper than a quote showing $3,100 per ton ($9,300 total) if the lower quote omits the municipal permit and duct leakage test, reuses an acid-contaminated line set without flushing, excludes a secondary float switch, installs cheap 1-inch filter grilles, or skips AHRI matching. Unbudgeted emergency service calls, short-cycling compressor damage, and voided factory warranties routinely make cheap change-out bids the most expensive system you ever buy.

Use the 16-point specification checklist below to audit all three contractor proposals on an exact apples-to-apples basis before comparing bottom-line numbers.

1. Baseline Project Specifications Record once before gathering quotes

Home Finished Area: __________ sq ft
Target Cooling Tonnage: _____ Tons
Primary System Type: [   ] AC+Gas   [   ] Heat Pump
Existing Ductwork State: [   ] Good   [   ] Leaky / Modify

2. Same-Scope Verification Checklist (16-Point Specification Audit)

Scope Item & Checkpoint What to Verify (Same-Scope Benchmark)
Quote 1
Contractor A
Quote 2
Contractor B
Quote 3
Contractor C
Group A: Load Sizing, Efficiency & AHRI System Match
1. ACCA Manual J Load Calculation Quote guarantees certified ACCA Manual J room-by-room thermal calculation. Prevents rule-of-thumb oversizing ("1 ton per 500 sq ft"), which causes short-cycling and indoor humidity issues. [   ] Included [   ] Included [   ] Included
2. AHRI Certified Match Certificate Includes AHRI reference number certifying outdoor condenser, indoor evaporator coil, and furnace/air handler match to deliver rated SEER2 and EER2 efficiency. [   ] AHRI # _____ [   ] AHRI # _____ [   ] AHRI # _____
3. Refrigerant Type (AIM Act Compliance) Specifies EPA AIM Act compliant low-GWP refrigerant (R-454B or R-32). Avoids obsolete phased-out R-410A equipment facing severe supply curtailments and high refill costs. [   ] R-454B / R-32 [   ] R-454B / R-32 [   ] R-454B / R-32
Group B: Refrigerant Line Set, Electrical & Gas Rough-in
4. Line Set Scope (Flush vs. Replace) Specifies brand-new copper line set or a pressurized Rx11 flush solvent treatment with nitrogen purge and 500-micron deep vacuum to eliminate residual acid oil. [   ] Flush [   ] New [   ] Flush [   ] New [   ] Flush [   ] New
5. Disconnect Box, Whip & Surge Protector New outdoor weatherproof electrical disconnect switch box, watertight electrical whip, and dedicated UL 1449 whole-unit surge protector to safeguard inverter electronics. [   ] Included [   ] Included [   ] Included
6. Gas Flex Line, Sediment Trap & Shut-Off New epoxy-coated stainless gas flex line, sediment trap (drip leg), and full-port 1/4-turn emergency shut-off valve on all furnace installations to satisfy NFPA 54. [   ] Included [   ] Included [   ] Included
7. Exhaust Flue Pipe & Venting Inspection Schedule 40 PVC/CPVC direct-vent piping for 90%+ condensing furnaces, or inspection/replacement of double-wall Type B metal vent pipe and chimney liner for 80% furnaces. [   ] Verified [   ] Verified [   ] Verified
Group C: Condensate Safety, Controls & Air Filtration
8. Secondary Drain Pan & Float Switch Heavy-gauge auxiliary drain pan under attic/closet air handler with dual electronic float switch cutoff switches to prevent catastrophic ceiling water damage. [   ] Pan + Switch [   ] Pan + Switch [   ] Pan + Switch
9. Smart Thermostat & 24V C-Wire Included programmable/smart thermostat (ecobee, Honeywell Home, or proprietary communicating control) with physical 18/5 or 18/8 dedicated common C-wire run. [   ] Thermostat Inc [   ] Thermostat Inc [   ] Thermostat Inc
10. Air Filtration Cabinet (4" Media Filter) Dedicated 4-to-5-inch MERV 11–13 media air cleaner cabinet at furnace/air handler intake vs. restrictive, low-efficiency 1-inch return air grille slots. [   ] 4" Media Filter [   ] 4" Media Filter [   ] 4" Media Filter
Group D: Duct Transitions & Airflow Commissioning
11. Custom Supply & Return Plenum Transitions Custom galvanized sheet metal plenum transitions connecting new equipment to existing ductwork, sealed airtight with fiber-mesh and UL 181 mastic sealant. [   ] Custom Mastic [   ] Custom Mastic [   ] Custom Mastic
12. Static Pressure Testing & CFM Balancing Post-installation total external static pressure (TESP) manometer test ensuring pressure is below 0.5 in. w.g. and blower motor delivers rated CFM airflow. [   ] TESP Tested [   ] TESP Tested [   ] TESP Tested
Group E: Decommissioning, Permits & Warranties
13. Old Equipment Disposal & EPA Recovery Certified recovery of old refrigerant per EPA Section 608 guidelines, complete equipment teardown, recycling, and job site haul-away included in base bid. [   ] Included [   ] Included [   ] Included
14. Municipal Permit & HERS Duct Leakage Test Contractor pulls local mechanical building permit and pays municipal fee ($150–$450), including third-party HERS duct leakage verification where mandated by code. [   ] Permit Included [   ] Permit Included [   ] Permit Included
15. Manufacturer Parts & Compressor Warranty Specifies 10-year limited parts and compressor warranty, including contractor commitment to register equipment with manufacturer within 60 days of startup. [   ] 10-Yr Parts [   ] 10-Yr Parts [   ] 10-Yr Parts
16. Contractor Workmanship & Labor Warranty Independent contractor labor warranty (1-year standard vs. 5-to-10-year extended labor guarantee) covering refrigerant recharge, adjustments, and replacement labor. [   ] ___ Yrs Labor [   ] ___ Yrs Labor [   ] ___ Yrs Labor

3. Bottom-Line Scope Normalization Calculation

Add back omitted line items to determine the true turnkey installed price per ton.

Cost Component Quote A Quote B Quote C
Contractor Proposed Total Bid ($)
Cooling System Tonnage (Tons)
Raw Price Per Ton (Total ÷ Tonnage) $ ______ / ton $ ______ / ton $ ______ / ton
Scope Add-Backs for Omitted Items (Permits, line flush, float switch, 4" filter, etc.)
Normalized Same-Scope Total
Raw bid + all omitted scope costs
 $ ____________ $ ____________ $ ____________
Normalized Price Per Ton
Only valid apples-to-apples comparison metric
 $ ______ / ton $ ______ / ton $ ______ / ton

Three Most Common HVAC Quote Traps Homeowners Encounter

1. Reusing Acid-Contaminated Line Sets Without Flushing

To keep bid prices deceptively low, contractors frequently braze a brand-new condenser directly onto old copper lines without a chemical solvent flush or evacuation. Residual acid sludge and mineral oil from the burned-out old system contaminate the new compressor’s POE/PVE synthetic lubricant, causing total compressor burnout within 18–36 months and instantly voiding the manufacturer warranty.

2. Mismatched Coils Voiding AHRI Efficiency & Warranty

Unscrupulous bids often swap only the outdoor condenser while leaving the old indoor evaporator coil in place. This "mismatched" configuration destroys SEER2 efficiency by 20% to 35%, leads to frozen coils and improper metering, and invalidates the manufacturer 10-year parts warranty. Always require an official AHRI Certified Match certificate before signing.

3. Unpermitted Swaps Skipping HERS Duct Leakage Testing

Cut-rate contractors avoid pulling local mechanical building permits to save $250–$500 and evade third-party duct leakage inspections. Leaky ductwork routinely dumps 25% to 40% of heated and cooled air into unconditioned attics or crawlspaces, completely erasing the energy savings of a high-efficiency system and creating major disclosure issues during future home sales.