Free invoice generator for HVAC technicians

Invoice for installs, service calls, parts, and maintenance plans in seconds. No sign-up, unlimited, and private.

Your business

Add your logo to the invoice header.

Bill to

Invoice details

Line items

DescriptionQtyPriceAmount

Template Pro for premium styles

One free toolkit for freelancers

Proposal → Contract → Invoice. All free, all private — and one $12 Pro unlocks every tool.

Make an invoice in 4 steps

  1. 1

    Add your details

    Your business and your client — that's it.

  2. 2

    Add line items

    Quantity × price totals automatically.

  3. 3

    Currency, tax & discount

    Plus shipping or a deposit if you need them.

  4. 4

    Download the PDF

    One click. No sign-up, nothing uploaded.

Why Plainvo

The honest comparison most invoice tools won't show you.

PlainvoMost free generatorsInvoicing apps
Sign-up requiredNoOften (email/account)Yes
Invoice limitUnlimitedOften cappedCapped on free tier
Your dataStays in your browserUploaded to their serversStored on their servers
PriceFree · $12 onceFree → subscription$9–$30 / month
WatermarkNoneSometimesSometimes
Payment feesNoneVariesOften 3%+ per payment

Invoicing for HVAC technicians

Heating and cooling jobs mix diagnostics, labour, equipment, and parts — a tidy invoice keeps them straight and gets you paid faster. Add a service-call fee, labour by the hour, and each part or unit as a separate line, apply tax, and download a professional PDF on the spot.

Common HVAC line items

Frequently asked questions

How do I invoice a maintenance agreement or seasonal tune-up?

Add the plan as its own line (for example Annual maintenance agreement or Seasonal tune-up) with quantity 1 and the plan price. For members, you can show the plan and then apply any agreement discount to the parts or labour lines.

How should I bill refrigerant and equipment on an HVAC invoice?

List refrigerant by the amount used and each unit or part as separate lines, kept apart from your service-call and labour lines. Itemising equipment helps customers understand the bill and makes manufacturer warranty claims easier to document.

Do I charge a diagnostic fee separately from the repair?

Many techs do. Add a service-call or diagnostic line for the visit, then labour and parts for the fix. If you waive the diagnostic when the customer approves the repair, you can simply remove that line before downloading the PDF.

Related templates

Plainvo Pro $12 once

Support the tool and unlock the extras — a one-time payment, yours forever. No subscription.

  • ✦ Remove the “Created with Plainvo” footer
  • ✦ Upload your own logo
  • ✦ 3 premium templates (Modern, Minimal, Bold)
  • ✦ Custom accent color to match your brand
  • ✦ Priority email support