HVAC estimates range from a small repair to a full system change-out, but the same rules apply: show what you'll install, what it costs and what's covered. Here's how.
1. Size and inspect before you quote a system
For replacements, check the home's size and layout, the existing equipment's capacity, the ductwork's condition, and the electrical supply. Quoting a like-for-like swap without checking is how call-backs happen.
2. Name the equipment
List the make, model and capacity of each unit, plus the thermostat, line set and pad if they're included. Clients compare quotes model by model, and the numbers are needed for warranty registration later.
3. Itemize parts, refrigerant and labor for repairs
For a repair, list the diagnostic or service call fee, each part, refrigerant by type and amount, and labor. Say whether the diagnostic fee is credited toward the repair.
4. Offer options when it makes sense
For replacements, two or three options (for example, a standard and a higher-efficiency system) let the client choose without another visit. Send each option as its own estimate so they can approve the one they want.
5. Explain the warranties
Say what the manufacturer covers, for how long, and whether it depends on registration. Then say how long you guarantee your installation labor.
6. Set your terms
Say how long the price holds (30 days is common, shorter when material prices move), what deposit you need to schedule the work, and when the balance is due.
Put anything the price depends on in writing: access to the site, the client moving furniture, or work hidden behind walls that you can't price until you open them up.
7. Send it while you're still there
The best time to send an estimate is before you leave. The homeowner is still thinking about the job, and you're not competing with the next quote they get.
Text or email a link they can open on their phone and approve with a tap, rather than a PDF they have to print, sign and scan.
A sample HVAC estimate
Here’s the kind of estimate these steps add up to, made in Invoizr. Names and numbers are made up.
Common mistakes
- Quoting equipment without a model number, so the client can't compare.
- Leaving out removal and disposal of the old equipment.
- Not asking for a deposit before ordering a system.
Free HVAC estimate template
A printable PDF with the lines HVAC contractors need most, ready to fill in by hand. No sign-up needed.
Or write it on your phone: Invoizr builds the estimate from your saved prices, sends it as a link the client approves with a tap, and turns it into an invoice when the job is done. See how Invoizr works for HVAC contractors, or try it free for 14 days.