Short answer
HVAC estimates around Burlington differ most in what they do about air: ducted systems, cooling, ventilation and the controls that tie them together, instead of the fuel-fired heating side of the trade. Compare whether airflow and duct sizing are actually measured or simply assumed from the old equipment, a cooling-load calculation, not a like-for-like replacement, duct sealing and return-air capability, refrigerant handling and electrical scope, and whether startup readings are recorded instead of only a visual check that the unit turns on. In Vermont the state licences attach to the work, so ask who holds the Certificate of Fitness for any fuel-fired equipment and who does the wiring.
Related service pages
When this is the wrong comparison
This guide covers ducted systems, cooling, ventilation and controls. Boilers, radiators, baseboard and fuel-fired heating are a different trade with different specialists, and the specialists for it often do no cooling work at all.
What a written estimate should show
Put these 6 points to every business and write the answers next to each estimate.
- Whether airflow and duct sizing are measured or assumed
- Cooling load calculation, not replacement in kind
- Duct sealing, insulation and return-air capability
- Refrigerant handling, electrical and condensate scope
- Commissioning readings recorded at startup
- Maintenance terms and what a visit actually includes
Reading the estimate line by line
The table sets a strong answer beside a weak one for the lines that most often decide the total.
| Estimate line | A strong estimate says | A weak estimate says |
|---|---|---|
| Sizing | Load calculation shown, with the assumptions | Same size as the old unit |
| Ducts | Airflow measured, leaks sealed or priced as an option | Existing ducts reused without a test |
| Refrigerant | Technician's EPA 608 certification stated | Not mentioned |
| Electrical | Disconnect, circuit and permit priced separately | "Electrical by others" with no scope |
| Startup | Readings recorded and handed over | Verbal "it's running fine" |
Vermont licences and permits for this work
Vermont does not license an HVAC company as such. Its licences and certificates attach to specific work: a Certificate of Fitness from the Division of Fire Safety for anyone who installs, inspects or services oil, propane or natural-gas equipment, a licensed electrician for permanent wiring, and, under federal rules, EPA Section 608 certification for anyone who handles refrigerant.
NATE certification and manufacturer training are voluntary. They show a technician has been tested, but they do not replace the state certificates, so an estimate for a fuel-fired system should still name the certificate holder.
What changes the job around Burlington
Cooling is a short season here. At the Essex Junction 1 N climate station the 1991-2020 normal is about 568 cooling degree days a year, and the temperature reaches 90°F or more on about 8 days in a typical year. That is why a cooling estimate should start from a cooling-load calculation and the ducts you already have, not from a bigger unit than the old one.
Many Burlington-area houses have no ducts at all, and older ones have ducts that were sized for heating only. Airflow measured at the registers, not assumed from the old equipment, is the fact that separates a good HVAC estimate from a like-for-like swap.
Warning signs in a written estimate
- Equipment chosen by matching the old nameplate
- No mention of duct condition or airflow
- A price that leaves out the electrical disconnect or condensate drain
- "Lifetime" claims that say nothing about who honours them
- Pressure to decide the same day
Questions to ask before you sign
- Did you calculate the cooling load, and can I see the numbers?
- How will you check airflow and duct leakage before and after?
- Who does the wiring, and is that person licensed in Vermont?
- Which readings do you record at startup, and do I get a copy?
- What does a maintenance visit include and how often is it needed?
Sources used for this comparison
Use the official company pages below to verify the services, coverage, credentials, offers and availability described in “HVAC estimates in Burlington, Vermont”. Inclusion does not imply affiliation or endorsement.
Common questions
Is there a Vermont HVAC licence?
There is no general HVAC licence. The state certifies specific work instead: oil-burner and gas Certificates of Fitness from the Division of Fire Safety, electrician licences for wiring, and federal EPA 608 certification for refrigerant handling.