HVAC Invoice Template: Tonnage, SEER2, Line Set, Permits

Short answer: An HVAC invoice template prices equipment by capacity, not by house size — one ton is 12,000 BTU/h, so a 3-ton system is 36,000. Name the matched outdoor and indoor units by model and serial, the AHRI reference, and the SEER2 rating installed. Then bill line set by the foot, duct by the foot or by register count, thermostat, electrical, permit, refrigerant weighed in, old equipment removal, and commissioning as separate lines.

An HVAC invoice is read by more people than any other trade’s paperwork: the homeowner, a utility running a rebate program, a manufacturer processing a warranty registration, a code inspector, and eventually a home buyer’s inspector. It has to carry model numbers, serial numbers, capacity, and measured readings, not just a price. The general field checklist in what to include on an invoice is the floor; the equipment identity and the commissioning numbers are what make it an HVAC document.

What goes on an HVAC invoice template?

Twelve blocks. Skip the equipment identity block and the customer cannot claim a rebate; skip the commissioning block and you have no defense when the system is blamed for a hot bedroom.

Block	What it has to say
Header	Company, mechanical license number, invoice number, date, due date
Property and system location	Address, and where the equipment lives: attic, closet, crawlspace, roof curb, slab
Equipment installed	Outdoor unit and indoor unit or coil, each by model and serial, plus the AHRI reference number
Capacity and efficiency	Nominal tons and BTU/h, SEER2, EER2, and HSPF2 for a heat pump
Distribution	Line set size and footage, duct modified in linear feet, registers or returns by count
Controls	Thermostat model, wiring, configuration, and any zoning equipment
Electrical	Disconnect, whip, breaker size, and who did the work
Condensate	Drain, trap, secondary pan, float switch
Refrigerant	Type and pounds or ounces added beyond the factory charge
Removal and disposal	Old equipment out, recovery performed, disposal fee
Permit and inspection	Permit number printed, fee at cost, inspection result
Commissioning and terms	Measured startup readings, warranty split, deposit applied, balance due

Serial numbers are not optional detail. A manufacturer warranty registration, a utility rebate form, and a warranty claim three years from now all ask for the same string of characters, and the invoice is where the homeowner will look for it.

Why does the invoice name tonnage and SEER2 instead of square footage?

Because square footage does not size equipment. Capacity comes from a load calculation — the ACCA Manual J method — that accounts for orientation, window area and type, insulation, infiltration, ceiling height, and the local design temperature. Two identical floor plans on opposite sides of a street can land a half ton apart.

Term	What it means	Why it belongs on the invoice
Ton	12,000 BTU/h of cooling capacity	The unit the whole system is matched around
Nominal tons	2, 2.5, 3, 3.5, 4, 5 for most residential equipment	What the customer will repeat to the next contractor
SEER2 / EER2	Seasonal and steady-state cooling efficiency under the current test procedure	Drives rebate eligibility and must match the AHRI-certified pair
HSPF2	Heating efficiency for a heat pump	Same reason, on the heating side
AHRI reference number	Identifies the certified outdoor and indoor combination	Rebates and warranties are issued against the pair, not the condenser

Getting the size wrong fails in two different directions, and both are worth explaining on the page rather than in an argument. Undersized equipment never reaches setpoint on a design day. Oversized equipment satisfies the thermostat fast and shuts off before it has removed much moisture, so the house is cold and clammy and the compressor short cycles. When a customer says the neighbor’s contractor quoted a 4-ton, the load calculation is the answer, and referencing it on the invoice — “capacity per Manual J load calculation dated August 4” — puts it in the record.

Write the SEER2 and EER2 of the matched pair you actually installed rather than the headline figure on the condenser’s box. Efficiency ratings apply to combinations, and the current test procedure replaced the older SEER method on January 1, 2023 using higher external static pressure, so old and new numbers are not interchangeable. Confirm the minimum that applies where you install: split air conditioner standards are regional, and heat pump standards are national.

Which install lines get their own row?

The ones that vary house to house. Blending them into “system installed, $X” makes every future question unanswerable and every rebate application a phone call.

Line	Unit	What changes it
Outdoor unit	Each, by model and serial	Capacity and efficiency tier
Indoor unit or coil	Each, by model and serial	Must be the AHRI-matched partner
Line set	Linear feet, with both diameters	Distance from equipment to air handler, and whether it can be reused
Refrigerant	Pounds or ounces beyond the factory charge	Line set length past the charge included from the factory
Duct modification	Linear feet, or supply and return counts	Plenum, transitions, undersized returns
Filter cabinet and grille	Each	Existing filter slot size and location
Thermostat	Each	Communicating, conventional, or zoned
Electrical	Each	Disconnect, whip, breaker, and whether an electrician was needed
Condensate	Job	Gravity drain, pump, secondary pan, float switch
Permit and inspection	At cost	Jurisdiction, and whether a load calculation must be filed
Removal and disposal	Each	Recovery, haul-off, and disposal fees
Commissioning	Job	Startup, charge verification, airflow, documentation

Refrigerant type belongs in the description. Legacy systems carry R-410A or older R-22; new residential equipment ships with lower-GWP A2L refrigerants such as R-454B or R-32, which changes handling, line set requirements, and what the next technician needs to know before opening the system.

How do I bill work the attic hid until install day?

The same way every trade should, with one difference: HVAC discoveries are usually in the duct system, and they are usually the reason the old system underperformed.

Put the unit price in the estimate, discover the condition, measure it, text the customer the number, and put the approved work on the invoice as its own numbered change order line with the date. A measurement makes this easy — “existing return measured 0.92 inches of water column total external static against a 0.5 rating” is a fact, and a fact is a much better sales tool than an opinion.

The four that come up most: an undersized or single return that needs a second drop, a return plenum that leaks at the platform, flex duct crushed or disconnected above a bedroom, and a filter slot too small for the airflow the new equipment needs. Price each of them in the estimate as an if-needed line at zero quantity, and the change order becomes a quantity rather than a negotiation.

What commissioning numbers belong on the invoice?

The readings you took at startup. They cost nothing to record, they prove the system was set up rather than merely installed, and they are the baseline every future service call is measured against.

Reading	What to write
Total external static pressure	Measured value in inches w.c., against the equipment’s rating
Supply and return temperatures	Both, with the resulting temperature split
Subcooling or superheat	Measured value against the manufacturer’s target for the metering device
Refrigerant charge	Factory charge plus weighed-in amount for line set length
Airflow verification	Method used and the CFM result
Safeties and controls	Float switch tested, thermostat configured, staging verified
Combustion, on gas equipment	Draft, gas pressure, and combustion analysis results

A homeowner will not read those lines. An inspector, a warranty adjuster, and the technician who shows up in four years all will, and so will you when someone calls in July claiming the system has never worked.

What does a filled-in HVAC invoice look like?

A 3-ton straight-cool changeout replacing an R-22 system: attic air handler, condenser on a pad, new line set, plenum transitions, a second return added as a change order. The rates below are placeholders from one market — equipment costs, labor rates, and permit fees vary enormously by region and by season, so copy the structure and use your own numbers.

INVOICE #2026-0884 · Issued August 21, 2026 · Balance due on commissioning Halstead Mechanical · Mechanical license #M-11207 Property: 9 Corliss Way · Permit #MECH-2026-2210, inspection passed August 21

#	Description	Qty	Rate	Amount
1	Outdoor condensing unit — 3 ton / 36,000 BTU/h, model and serial recorded, AHRI ref. on file	1	$2,485.00	$2,485.00
2	Matched indoor air handler and coil — model and serial recorded, AHRI-certified pair	1	$1,640.00	$1,640.00
3	Line set — 3/4 in suction and 3/8 in liquid per manufacturer table, new, penetrations sealed	28 lf	$16.50	$462.00
4	Refrigerant weighed in beyond factory charge for line set length	1.4 lb	$38.00	$53.20
5	Condensate — new PVC drain and trap, secondary pan, float switch	1	$285.00	$285.00
6	Electrical — new disconnect, whip, 30A/2P breaker replaced	1	$340.00	$340.00
7	Supply plenum and transitions, fabricated and sealed with mastic	1	$520.00	$520.00
8	Filter cabinet, 20x25, and grille	1	$265.00	$265.00
9	Thermostat, installed, wired, and configured for equipment staging	1	$215.00	$215.00
10	Installation labor — 2 technicians, 9 hours	18 hr	$95.00	$1,710.00
11	Removal of existing R-22 system — refrigerant recovered per EPA Section 608, equipment hauled and disposed	1	$265.00	$265.00
12	Mechanical permit and inspection, at cost	1	$185.00	$185.00
13	Commissioning — static pressure, temperature split, subcooling, airflow, safeties tested, readings recorded below	1	$175.00	$175.00
14	CHANGE ORDER #1 — second 16x20 return drop; existing return measured 0.92 in. w.c. total external static against a 0.5 rating; approved by text August 20	1	$685.00	$685.00

Subtotal	$9,285.20
Deposit received at scheduling	-$2,500.00
Balance due	$6,785.20

Startup readings: total external static 0.54 in. w.c. after return added · return 76°F, supply 57°F, 19°F split · subcooling to manufacturer target · float switch tested · thermostat staging verified. Warranty: labor warranty per contract; manufacturer parts warranty registered in the owner’s name, registration confirmation to follow. Not included: duct replacement beyond the plenum and return drop above, insulation, electrical panel work, and drywall repair at the return opening.

How do I bill a service call on the same template?

Service is a different pricing model living in the same document shell, and the two should never be blended into one line.

	Install	Service
Priced from	Capacity, equipment, and footage	The failed component and the time to reach it
First line	Equipment	Diagnostic or trip charge, quoted before you drive
Labor	Crew hours or a flat install price	Flat rate per repair, or hourly after diagnosis
Approval	Signed proposal, deposit at scheduling	Verbal or text approval after diagnosis, recorded on the invoice
Payment	Deposit and balance	Due on completion, collected on site

A maintenance plan is a third pattern again: a fixed annual or monthly fee covering a stated number of visits, billed on a schedule, with any repair found during the visit invoiced separately. Show the plan discount as a visible line rather than a quietly lower rate, so the customer sees what the plan is doing for them each time.

What terms get me paid the same day?

Deposit at scheduling covers the equipment you are about to order and ties the money to a date. The balance is due at commissioning, presented on site while the readings are fresh and the customer is standing in a cool house — the practical version of everything in how to get clients to pay. A payment link rendered as a QR code on your phone converts far better than a mailed statement.

Two documents ride along at handover. The rebate paperwork usually needs the AHRI reference number, the SEER2 rating, the equipment serials, and an itemized invoice showing the installed cost — hand it over completed rather than promising to send it. And the paid-in-full document the customer files with their closing paperwork is a receipt, not another copy of the invoice, which is the distinction covered in invoice vs receipt and the one bookkeepers ask about most.

What do I keep after the HVAC invoice goes out?

The equipment serials and AHRI reference, the load calculation, the permit and inspection record, the commissioning readings, the recovery record for the old refrigerant, the supply house receipts, and the warranty registration confirmation. Recovery is not paperwork you can skip — technicians servicing or disposing of equipment containing refrigerant must hold EPA Section 608 technician certification, and the disposal line on your invoice is the customer-facing half of that obligation.

Keel is an iOS app that runs entirely on your device — no account, no bank connection, no cloud, no login, and an App Store privacy label reading Data Not Collected. That matters more in this trade than most, because the invoice usually gets finished in an attic or a mechanical closet where nothing syncs. You write the serials, the static pressure reading, and the change order where you measured them, with your logo, your numbering, and a QR payment link the homeowner scans before you fold the ladder. The supply house ticket for the line set and the coil is photographed at the counter and read on device by Apple Intelligence, so the equipment cost is attached to the job rather than to a memory. Freeboard shows cash minus tax reserve minus committed invoices minus buffer, which is exactly what a stack of scheduling deposits on equipment not yet delivered distorts. The truck’s runs between the supply house, the jobsite, and the permit office are logged as mileage, one of the steadier self-employed tax deductions in a service business. Free is $0 with unlimited invoices, receipts, and mileage; Keel Pro is a one-time $249.99 Lifetime purchase, not a subscription.

Frequently asked questions

What should an HVAC invoice include?

Invoice number and date, property address and equipment location, outdoor and indoor units by model and serial, the AHRI reference number, nominal tonnage and BTU/h, SEER2 and EER2, line set size and footage, refrigerant type and amount added, duct and register work, thermostat, electrical, condensate, permit number, removal and disposal, commissioning readings, deposit applied, and the balance due.

How is HVAC equipment sized, and does the invoice need to say so?

Sizing comes from a Manual J load calculation, not from square footage. The calculation weighs orientation, windows, insulation, infiltration, and local design temperatures. Referencing it on the invoice — capacity per load calculation, with its date — protects you when a customer compares your 3-ton recommendation against a neighbor’s 4-ton quote, and some jurisdictions require the calculation with the permit application.

What does one ton mean on an HVAC invoice?

One ton equals 12,000 BTU per hour of cooling capacity, so a 3-ton system is rated at 36,000 BTU/h. Residential equipment comes in nominal half-ton steps from about 1.5 to 5 tons. Write both the tonnage and the BTU/h figure on the invoice, since rebate forms and warranty registrations ask for one or the other and homeowners repeat whichever they saw.

Should refrigerant be a separate line on the invoice?

Yes, with the type named and the amount stated in pounds or ounces. New equipment arrives with a factory charge covering a stated line set length; anything beyond that is weighed in and billed. On a service call, the amount added is also a diagnostic fact, since a system needing refrigerant has a leak. Recovery from the removed system belongs on its own disposal line.

Do I bill a service call and an installation the same way?

No. A service call starts with a diagnostic or trip charge and prices the failed component, either flat rate or hourly after diagnosis. An installation prices matched equipment, footage, and permits, with a deposit at scheduling and the balance at commissioning. Use the same document shell and the same header blocks, but never merge the two pricing models into a single line.

What startup readings should go on an HVAC install invoice?

Total external static pressure in inches of water column, supply and return temperatures with the resulting split, subcooling or superheat against the manufacturer target, the weighed refrigerant charge, the airflow verification method and result, and confirmation that safeties and thermostat staging were tested. On gas equipment, add draft, gas pressure, and combustion results. These become the baseline for every future service visit.

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This article is general information, not professional or tax advice.