HVAC Estimate Template: What to Include and How to Follow Up

Short answer: A good HVAC estimate names the customer and the site, describes the existing system and the problem, lists the exact equipment (brand, model, size and efficiency), separates labor, materials, permits and removal, states the warranty, the payment terms and an expiry date, and ends with a clear signature and deposit step. For replacements, offer two or three options side by side. Then follow up on a schedule: the same day, two days later, a week later and before the estimate expires.

Key points

  • Homeowners compare HVAC estimates line by line. Vague lines like "install new system" lose to competitors who spell out the model, size and what is included.
  • Size the system from a load calculation, not from the old unit's label. ACCA's Manual J is an ANSI-recognized standard for residential load calculations.
  • Show options. Good-better-best lets the customer choose between price and efficiency instead of choosing between you and another contractor.
  • Rules change. Refrigerant rules, rebates and tax credits have all shifted recently. Check them on the day you quote and write the date on the estimate.
  • Consumer protection rules apply. In Ontario, for example, you cannot charge more than 10% above an estimate in a contract without a signed change.
  • Most estimates are not lost to a "no". They are lost to silence. A written follow-up schedule fixes that.

By Gravun Team · Published October 16, 2026 · Last updated October 16, 2026.

What should an HVAC estimate include?

Every HVAC estimate, whether for a repair, a replacement or a new install, should answer five questions for the homeowner: what is wrong, what you will do, what equipment you will use, what it costs, and what happens next.

Here is the checklist.

Section What to include Why it matters
Your business details Legal name, address, phone, email, licence or registration numbers where your area requires them Builds trust and is often required
Customer and site Name, service address, contact phone and email, date of visit Ties the estimate to the right job
Estimate number and dates A unique number, issue date and an expiry date Prevents old prices being held against you
Existing system Equipment type, age, fuel, approximate size, condition, photos if possible Shows you looked properly
Problem or goal "No heat, failed heat exchanger" or "Replace 18-year-old AC, customer wants lower bills" Connects the price to the customer's reason
Scope of work Step by step: remove, install, connect, test, clean up Removes "I thought that was included" disputes
Equipment Brand, model number, capacity, efficiency rating, refrigerant type Lets the customer compare like for like
Materials Line set, pad, thermostat, ductwork changes, electrical work, venting Often the source of price differences
Labour Hours or a fixed labour price Shows what the work is worth
Permits and inspections Who pulls the permit, and the cost Required in many areas
Removal and disposal Old equipment removal and refrigerant recovery Often forgotten, often questioned
Warranty Manufacturer parts warranty, your labour warranty, any registration steps A major reason customers choose one bid over another
Rebates and financing Programs the job may qualify for, with "subject to program rules" Clear but not a promise
Price summary Subtotal, taxes, total, deposit amount No surprises
Payment terms Deposit, balance due date, accepted methods Gets you paid on time
Terms and exclusions What is not included, what happens if hidden problems are found Protects both sides
Acceptance Signature line, date, and a deposit button or instructions Makes saying yes easy

For the difference between an estimate and a fixed quote, and when to use each, see our guide to estimates vs quotes.

Free HVAC estimate template (copy and paste)

Copy this into your estimate tool or word processor and fill in the brackets. The numbers are placeholders, not suggested prices.

[Your Business Name] [Address] · [Phone] · [Email] · [Licence or registration number, if required in your area]

HVAC Estimate #[number] Issue date: [date] · Valid until: [date, for example 30 days later]

Prepared for: [Customer name] Service address: [Address] Phone / email: [Phone] · [Email] Visit date: [Date] · Technician: [Name]

1. What we found Existing system: [for example, gas furnace and central AC, about 18 years old]. Condition: [summary]. Photos attached. Customer goal: [for example, replace failing furnace before winter, keep monthly costs down].

2. What we recommend [One or two sentences in plain words.]

3. Load calculation Heating and cooling loads calculated using [method, for example ACCA Manual J] on [date]. Recommended capacity: [heating] / [cooling].

4. Options

Option A: Good Option B: Better Option C: Best
Equipment [Brand, model, capacity] [Brand, model, capacity] [Brand, model, capacity]
Efficiency [rating] [rating] [rating]
Refrigerant [type] [type] [type]
Thermostat [model] [model] [model]
Parts warranty [years, registration required?] [years] [years]
Labour warranty [years] [years] [years]
Price before tax $[ ] $[ ] $[ ]

5. Scope of work (all options)

  1. Shut off and disconnect existing equipment.
  2. Recover refrigerant and remove old equipment for disposal.
  3. Install new equipment on [pad / platform].
  4. Connect gas, electrical, venting, condensate and line set as needed.
  5. Install thermostat and set up.
  6. Start up, test, and record readings.
  7. Clean up work area and review operation with the homeowner.

6. Permits and inspection [We obtain the permit and arrange inspection / Not required]. Cost: $[ ].

7. Not included [For example, ductwork changes, electrical panel upgrades, drywall or painting repairs, asbestos or mould remediation.] If hidden conditions are found, we will stop, explain the issue and provide a written change order before any extra work.

8. Rebates and financing This job may qualify for: [programs]. Rebates are subject to each program's rules and approval. We do not guarantee program eligibility or amounts.

9. Price summary (chosen option) Subtotal: $[ ] · Tax: $[ ] · Total: $[ ] Deposit to book: $[ ] · Balance due: [on completion / within X days] Payment methods: [card, bank transfer, financing].

10. Acceptance By signing, you accept Option [ ] and the terms above. Customer signature: ____________ Date: ________

How do I price an HVAC estimate?

There is no single right price. Your price has to cover equipment, materials, labour, overhead and profit, and still be competitive in your market. Build it up in the same order every time.

  1. Equipment cost from your supplier, for the exact model.
  2. Materials for this job: line set, pad, fittings, thermostat, vent pipe, electrical.
  3. Labour hours × your loaded hourly cost (wage plus taxes, benefits, insurance and vehicle).
  4. Permits, disposal and refrigerant handling.
  5. Overhead share: office, software, rent, advertising, warranty callbacks.
  6. Profit margin on top.

Two habits help:

  • Price from your own numbers, not a competitor's. If you do not know your loaded hourly cost and overhead, work them out first. Our article on the KPIs every business should track explains the basics.
  • Use templates for common jobs. A furnace swap, a heat pump install and a standard AC replacement can each have a saved template with the usual line items. You change the model and the price, not the whole document.

Why should I offer good-better-best options?

Because it changes the question in the customer's head. With one price, they ask, "Should I hire this contractor or someone else?" With three options, they ask, "Which of these should I choose?"

How to build them well:

  • Make each option a real choice. Different efficiency, features or warranty, not three nearly identical systems.
  • Keep the scope the same. All three options should include the same installation work, so the price difference is clearly the equipment.
  • Explain the difference in plain words. "Option B costs $[ ] more and is quieter and more efficient." Customers do not know what SEER2 or AFUE mean unless you tell them.
  • Do not make Option A a trap. It should be a system you are happy to install and stand behind.

What rules should an HVAC estimate account for?

Rules affect what you can install and what the customer pays. They change often, so check them on the day you quote and write that date on the estimate. This is general information, not legal or tax advice.

Load calculations

Sizing a system by matching the old unit's label is a common way to get it wrong. ACCA (the Air Conditioning Contractors of America) publishes Manual J for residential load calculations, Manual S for equipment selection, and Manual D for duct design. ANSI has recognized Manual J as a standard. Check whether your local code or permit office asks for a load calculation, and write on the estimate how you sized the system.

Refrigerants (US)

The US Environmental Protection Agency has been phasing down high global-warming refrigerants, which affects which equipment can be installed and when. As of an April 2026 update from ACCA, the EPA had proposed removing the 1 January 2026 installation deadline for residential and light commercial R-410A equipment, the proposal was under review and not final, and New York's own state rule still applied. Check the current EPA rule and your state's rules before quoting R-410A equipment, and list the refrigerant type on every option.

Tax credits and rebates

Rebates and credits move people from "maybe next year" to "yes", but they also change without much notice. Two examples:

  • United States: The IRS says the Energy Efficient Home Improvement Credit (section 25C) "will not be allowed for any property placed in service after December 31, 2025", following changes made by Public Law 119-21. Do not promise this credit on a 2026 install.
  • Canada: Natural Resources Canada says the Canada Greener Homes Grant is closed. Applications were open from May 2021 to February 2024. Other federal, provincial and utility programs may be available, so check them on the day you quote.

On the estimate, list programs as "may qualify, subject to program rules". Never put a rebate amount into the total as if it were guaranteed.

Consumer protection

Estimates for homeowners are covered by consumer protection law. Ontario's guidance for home renovation businesses, for example, says:

  • You must have a written agreement for any contract worth more than $50.
  • If an estimate is part of the contract, you cannot charge more than 10% above it unless the customer asks for additional or different work and you have a signed change to the contract.
  • A customer who signs a contract at their home has a 10-day cooling-off period.
  • The province recommends deposits of no more than 10% of the total project cost.

Other provinces and US states have their own rules. Check yours.

How should I present the estimate?

How you deliver the estimate is part of the sale.

  • Send it the same day. Ideally before you leave the driveway, or that evening at the latest. A homeowner with a broken furnace is collecting quotes right now.
  • Walk through it in person or by phone. Explain the options, the warranty and what happens on install day.
  • Make it easy to read on a phone. Most homeowners will open your estimate on their phone.
  • Let them sign and pay online. If saying yes means printing, signing and scanning, many will put it off. Electronic signatures are valid for estimates in most cases; see are electronic signatures legal.
  • Include photos. A photo of the cracked heat exchanger or the corroded coil explains more than a paragraph.

How do I follow up on an HVAC estimate?

Most estimates that go nowhere are not refused. The homeowner gets busy, forgets, or waits for a third quote. A follow-up schedule brings them back.

When Channel What to say
Same day Text or email with the estimate "Here is your estimate from today. Any questions, reply here."
Day 2 Phone call "Did you get a chance to look at the options? Happy to explain the difference."
Day 5 to 7 Text or email Answer a common question, such as warranty, financing or install timing
Day 14 Phone or text "Just checking in. Our install schedule for next week is filling up." Only say this if it is true.
3 days before expiry Email "Your estimate is valid until [date]. After that, equipment prices may change."
After expiry Email, once "Would you like an updated estimate?" Then stop.

Rules for follow-up:

  • Stop when they answer. Yes, no or "not this year" all end the sequence.
  • Be helpful, not pushy. Every message should give the customer something: an answer, a reminder, a date.
  • Ask why when you lose. A short "Can I ask what made the difference?" teaches you more than any article.
  • Follow texting and email rules. Follow-up about an estimate the customer asked for is very different from marketing, but always name your business and honor opt-outs.

Follow-up message templates

Day 2 text:

Hi [Name], it's [Your name] from [Business]. Just checking you got the estimate for your [furnace / AC]. Any questions about the options? Happy to call.

Day 7 email:

Subject: Your [furnace / AC] options Hi [Name], a few customers ask about the difference between Option B and C, so here it is in one line: [plain explanation]. Your estimate is valid until [date]. Reply or call [phone] when you are ready.

Before expiry:

Hi [Name], your estimate #[number] is valid until [date]. If you'd like to go ahead, you can sign and pay the deposit here: [link]. If you've decided not to, a quick reply helps us. Thanks!

For the full process from estimate to payment, see from quote to paid.

What are the most common mistakes on HVAC estimates?

  1. "Supply and install new furnace, $X." No model, no size, no efficiency. The homeowner cannot compare and will not trust it.
  2. Sizing by the old unit. Write down your load calculation method.
  3. No expiry date. Equipment prices change. A six-month-old estimate should not bind you.
  4. Hidden exclusions. If ductwork, electrical upgrades or drywall repair are not included, say so.
  5. Promising rebates. List them as possible, not guaranteed.
  6. Taking days to send it. The fastest complete estimate often wins.
  7. One follow-up, then silence. Use a schedule.
  8. Separate tools for estimate, signature and invoice. Numbers get retyped and drift. See the real cost of separate business apps.

What does this look like in a real business?

These are illustrations, not customer stories.

A three-technician HVAC company in October. Furnace calls pick up as the weather turns. The owner keeps templates for a standard furnace swap, a high-efficiency upgrade and a furnace plus AC combo. On site, the technician picks the template, adds the model numbers and photos, and sends the estimate from the truck. The homeowner signs Option B that evening and pays the deposit online.

A one-person heating and cooling business. The owner used to write estimates at night. Now each estimate goes out from the phone before leaving, and the follow-up messages are scheduled automatically. Fewer estimates are forgotten.

A plumbing and heating company. Water heater and boiler jobs share a template with the same terms and exclusions, so every estimate the team sends says the same thing.

How does Gravun handle HVAC estimates?

Gravun is the business operating system for any kind of business, and HVAC is a strong fit. Estimates, signatures, deposits, scheduling and invoices sit in one app, next to the customer's calls and texts.

What is in it:

  • Estimates and proposals with line items, saved templates, and pages such as a cover, an about-us page and terms.
  • Gravun Sign (e-signatures) so the homeowner can accept on their phone.
  • Deposits and payments so they can pay to book in the same visit.
  • Automations to send follow-up texts and emails on a schedule, and stop when the customer replies.
  • Scheduling and booking pages to book the install once the estimate is signed.
  • Calls and texts with a business phone, so every follow-up sits on the customer's record.
  • Gavin (Gravun's AI receptionist and assistant), which can answer calls and help with tasks such as drafting estimates.
  • Gravun Relay (team chat) to tell the install crew the job is booked.
  • Email marketing and campaigns for seasonal tune-up reminders to past customers.

Price. Scale, the most popular plan, is $99 per user per month, as shown on gravun.com on 16 October 2026. See pricing and the full platform.

Who it fits. HVAC, plumbing and other trades, and any business that sends estimates and wants signing, payment and follow-up in one place.

Who it may not fit. Large HVAC companies that need advanced dispatch, route optimization or a deep accounting integration may need a specialist field service tool. Gravun is also new, launching in 2026. Our comparison of all-in-one software for trades and /compare lay out the choices.

Frequently asked questions

What should be included in an HVAC estimate?

Your business details, the customer and site, the existing system and the problem, the scope of work, the exact equipment with model and efficiency, materials, labour, permits, removal, warranty, rebates as "may qualify", the price summary, payment terms, exclusions, an expiry date and a signature line.

How long should an HVAC estimate be valid?

Many contractors use 30 days. Equipment and material prices change, so a short validity period protects you. Write the expiry date on the estimate.

Should I give one price or several options?

For replacements, offer two or three options. Good-better-best lets the customer choose between price and efficiency, and keeps them comparing your options rather than your competitors.

How do I size an HVAC system for an estimate?

Use a load calculation, not the old unit's size. ACCA's Manual J is an ANSI-recognized standard for residential load calculations. Note the method on the estimate.

Can I charge more than my HVAC estimate?

It depends on where you work. In Ontario, if an estimate is part of the contract, you cannot charge more than 10% above it unless the customer asked for more or different work and you have a signed change. Check the rules in your province or state.

Can I still claim the 25C tax credit on a new HVAC system?

The IRS says the Energy Efficient Home Improvement Credit will not be allowed for any property placed in service after 31 December 2025. Check with a tax professional for any job placed in service before that date.

How often should I follow up on an HVAC estimate?

A simple schedule works: the same day, day 2, around day 7, day 14 and a few days before the estimate expires. Stop as soon as the customer gives you an answer.

Can a homeowner sign an HVAC estimate online?

Yes. Electronic signatures are valid for most estimates in the US and Canada. Use a tool that records who signed and when, and sends everyone a copy.

Send your next HVAC estimate before you leave the driveway

Take the template above, save it with your own terms and your three most common jobs, and set a follow-up schedule you will actually keep.

If you want estimates, signatures, deposits, follow-up and scheduling in one app, start the 14-day free trial at gravun.com/free-trial. No credit card, and you can cancel anytime.

Sources

All sources checked on 16 October 2026. This article is general information, not legal or tax advice.

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