Hiring & Quotes
15 Questions to Ask an HVAC Contractor Before You Hire
6 min readUpdated July 2026
The difference between a great HVAC experience and an expensive mistake usually comes down to questions asked before any work starts. Print this list, or keep it open during your quote appointments — good contractors will happily answer every one.
Licensing and protection
- 1. Are you licensed for HVAC work in Minnesota, and can I see the license number?
- 2. Are you insured and bonded — and will you provide proof?
- 3. Will this job require a permit, and do you pull it (not me)?
About the quote
- 4. Is this quote itemized — equipment model numbers, labor, permit, disposal?
- 5. How long is the quote valid?
- 6. What exactly is not included?
- 7. Are there financing options, and what's the true cost with financing?
About the work (replacements)
- 8. Did you perform a Manual J load calculation, or size by square footage?
- 9. Why this equipment size and efficiency for my home specifically?
- 10. Will you inspect and address my ductwork, or just swap the box?
- 11. Which rebates does this equipment qualify for, and who files them?
After the install
- 12. What's the labor warranty (not just the manufacturer's parts warranty)?
- 13. Who registers the equipment warranty — you or me?
- 14. What does the first year of service look like if something's wrong?
- 15. Do you offer maintenance plans, and what do they actually include?
Red flags that should end the conversation
| Red flag | Why it matters |
|---|---|
| Quote over the phone without seeing the system | Serious sizing requires a site visit |
| Pressure to sign today for a 'special price' | Legitimate pricing survives a day of thought |
| No license number on the quote or truck | Unlicensed work voids insurance and permits |
| 'We don't need a permit' | Permits protect you at resale and with insurance |
| Sizing by square footage alone | Skipping load calculation causes comfort problems for 15+ years |
Ready to compare real quotes?
Eagan HVACs connects you with vetted local contractors so you can compare multiple estimates — free, and with no obligation.
FAQ
Related questions
How many quotes should I get?
Three is the sweet spot for replacements — enough to see the price range and different approaches without dragging the process out. For simple repairs, one trusted diagnosis is often enough.
Should I always pick the cheapest quote?
No — pick the best scope at a fair price. The cheapest quote often omits permits, skimps on warranty, or reuses undersized ductwork. Use the itemization to find why prices differ.
How do I verify a Minnesota contractor's license?
Ask for the license number and check it with the Minnesota Department of Labor and Industry's license lookup. Reputable contractors volunteer this without hesitation.