How to Compare HVAC Quotes Apples-to-Apples
Two HVAC quotes are only comparable if they specify the same tonnage, the same SEER2/AFUE tier, and the same scope of work (equipment only vs. equipment plus ductwork, permit, and disposal of the old unit). The cheapest number on paper is often cheapest because it's a smaller, less efficient system or because it quietly excludes a permit or disposal fee the more expensive quote includes, not because the contractor is more efficient or offering a better deal.
| Line item | What the quote should say | Why it matters |
|---|---|---|
| System size | Tonnage (cooling) and BTU/h (heating), from a load calculation | A different size is a different job, and the wrong size costs more to run. |
| Efficiency tier | SEER2 for cooling, AFUE or HSPF2 for heating | Entry and premium tiers differ in price for a real difference in efficiency and noise. |
| Matched equipment | Model numbers for the outdoor and indoor units | Check the pairing is rated together in the AHRI Certification Directory. |
| Load calculation | Whether a Manual J calculation was done | Sizing by rule of thumb is how oversized systems get installed. |
| Permit | Whether the permit is included and who pulls it | A missing permit is a common reason one quote looks cheaper. |
| Old unit removal | Removal, disposal and refrigerant recovery | Refrigerant must be recovered by a technician certified under EPA Section 608. |
| Ductwork and electrical | Any duct repair, new circuit or breaker work, priced separately | These are often left out of the headline number. |
| Warranty | Parts and labor coverage, in years, and who honors it | Manufacturer parts cover and contractor labor cover are separate. |
| License | The contractor's license number | Check it yourself on your state lookup: see how to verify an HVAC license. |
Confirm these four things are identical before comparing price
- Tonnage. A 2.5-ton and a 3-ton system aren't the same job, even for the same house: one of them may be the wrong size.
- SEER2 / AFUE tier. An entry-tier and a premium-tier system at the same tonnage can differ by thousands, for a real difference in efficiency and noise, not just markup.
- Scope. Does the quote include ductwork repair, the permit, and removal/disposal of the old unit, or are any of those a separate line item not included in the headline number?
- Matched system. Same brand indoor and outdoor components, or a mismatched pairing that runs below its rated efficiency.
Get it itemized, not a lump sum
An itemized quote breaks out equipment cost, labor, permit, and any ductwork or electrical work separately. This is directly comparable against another itemized quote; a single bottom-line number isn't, because you can't tell which component is driving the difference between two bids. A contractor reluctant to itemize is worth a direct question about why: the FTC's own guidance on avoiding home improvement scams names a vague, unitemized estimate as one of the real warning signs to watch for.
The lowest quote isn't automatically the best deal
A quote that's meaningfully lower than the others is usually lower for a specific, findable reason: smaller tonnage, lower SEER2 tier, excluded permit or disposal cost, or an unlicensed or underinsured contractor cutting corners elsewhere. None of that is a given (a genuinely lower price can be real), but the way to know which it is is to check the items above line by line, not to assume the cheapest bid is simply the best negotiator. In a competitive market like Los Angeles, getting three real quotes is rarely the hard part: the comparison itself is.
Frequently asked questions
Should I always go with the middle-priced quote?
Not automatically: "middle" is only meaningful once you've confirmed all three quotes specify the same tonnage, efficiency tier and scope. Once they're genuinely comparable, the middle quote isn't inherently safer than the lowest or highest; check what's actually different about each one first.
Is it reasonable to ask a contractor to match a competitor's quote?
Reasonable to ask, but only once you've confirmed the two quotes are actually for the same tonnage, efficiency tier and scope of work: asking a contractor to match a quote for a smaller or lower-tier system isn't a fair ask, and a contractor who points that out isn't being difficult.
What questions should I ask before even requesting a quote?
See questions to ask an HVAC contractor for the full list: licensing, insurance, load calculation and matched-system questions all belong before you're comparing numbers at all.
Sources
Sources cited in this guide. Commercial pricing sources are marked as industry data. Guide last updated October 31, 2026.
- AHRI: AHRI Certification Directory
- U.S. EPA: Stationary Refrigeration and Air Conditioning (Section 608)
- ENERGY STAR: Heating & Air Conditioning Installation Bid Comparison Checklist (PDF)
- Federal Trade Commission: How To Avoid a Home Improvement Scam
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