An HVAC quote can look like a foreign language: tonnage, SEER ratings, line-set, condensate drain, recovery fees. Let's walk through a realistic sample quote for a standard residential AC and furnace replacement, line by line, so you know exactly what everything means and what it should cost.

This example is based on a typical 2,000 sq ft home in a moderate climate zone, replacing a 15-year-old 3-ton AC and 80,000 BTU furnace.

ABC Heating & Cooling — Proposal #2024-0847

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Line 1: Carrier Comfort 24ACC636A003 — 3-Ton, 16 SEER Air Conditioner — $3,800

This is the outdoor condensing unit (the big box outside). The model number tells you exactly what you're getting. "3-Ton" is the cooling capacity (appropriate for ~1,800-2,400 sq ft depending on insulation). "16 SEER" is the efficiency rating. $3,800 is a fair mid-range price for this equipment — budget units start around $2,500 and premium units reach $5,500+.

What to check: Google the model number. Verify the SEER rating matches what was discussed. The tonnage should match a load calculation, not just "same as the old one."

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Line 2: Carrier Performance 59SC5B080E — 80,000 BTU Gas Furnace, 96% AFUE — $2,400

This is your heating unit (installed indoors, usually in a closet, attic, or basement). "80,000 BTU" is the heating output. "96% AFUE" means 96 cents of every dollar spent on gas becomes heat — very efficient. Standard AFUE ratings range from 80% (builder grade) to 98% (premium).

What to check: In mild climates, 80% AFUE may be fine. In cold climates, the extra $800-$1,200 for a 96% model pays for itself in 3-5 years.

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Line 3: Labor — Installation (2 technicians, 1 day) — $2,800

Labor for a standard 1-day installation with a 2-person crew. This is typical for a straightforward replacement where the new system fits the existing connections. Labor increases significantly if ductwork modifications, electrical upgrades, or attic installations are required.

What to check: Some quotes bury labor into the equipment price (showing one lump sum). This isn't necessarily bad, but itemized labor helps you compare quotes accurately.

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Line 4: Refrigerant Line Set — $350

The copper tubing connecting your outdoor AC unit to the indoor coil. If the existing line set is the right size and in good condition, it can be reused (saving $350). If the new system requires different sized lines or the old ones are corroded, replacement is necessary.

What to check: Ask if reusing the existing line set is an option. Some contractors automatically replace it (safer bet), while others inspect and decide.

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Line 5: Thermostat — Honeywell T6 Pro Programmable — $185

A solid mid-range programmable thermostat. Smart thermostats (Nest, Ecobee) run $200-$350 installed. Builder-grade non-programmable models are $50-$75.

What to check: If you already own a smart thermostat, ask if it's compatible and request a credit for the thermostat line item.

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Line 6: Mechanical Permit & Inspection — $450

The city permit required for HVAC replacement. The contractor files the paperwork, pays the fee, and schedules the inspection. This is non-negotiable — the work must be permitted.

What to check: If this line is missing from a quote, the contractor either plans to skip the permit (illegal) or will charge you separately.

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Line 7: Disposal — Remove & Haul Existing Equipment, Refrigerant Recovery — $300

Includes disconnecting the old system, legally recovering the refrigerant (EPA requirement), and removing the old equipment from your property.

What to check: If this is missing, ask: "What happens to the old unit?" You don't want a 300-pound rusted AC sitting in your driveway.

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Line 8: Miscellaneous Materials — Disconnect, Pad, Drain Line, Fittings — $275

Small but necessary parts: the electrical disconnect (safety shutoff near the outdoor unit), concrete or composite pad for the outdoor unit, condensate drain line, and various fittings and connectors.

What to check: This is a reasonable catchall. Be wary of a "miscellaneous" line over $500 without itemization.

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Quote Total: $10,560

This is a fair, complete quote for a mid-range AC + furnace replacement in a moderate-cost metro area. Prices vary significantly by region — expect 15-25% higher in high-cost areas (NYC, SF) and 10-20% lower in rural areas.

Now that you know what to look for, upload your actual quotes to Zollera's comparison tool. Our AI reads your quotes and creates a side-by-side breakdown showing exactly what each contractor includes — and what they don't. You can also get a price estimate for your specific project to see how your quotes compare to market rates.