HVAC Invoice Example: Tons, SEER2, and Matched Pairs

Short answer: An HVAC invoice example prices capacity, not house size. This one bills 2.5 tons — 30,000 BTU/h at 12,000 BTU/h per ton — because the Manual J came back at 27,400 BTU/h, replacing an oversized 3-ton unit. The outdoor and indoor units sit on separate lines as an AHRI-matched pair, the line set runs 24 feet at a rate per foot, refrigerant is weighed in by the pound, and commissioning readings are printed on the page.

Below is one finished changeout: a 1,620 sq ft slab house, closet air handler, heat pump on a pad, a return duct that was strangling the old blower. The universal field checklist is in what to include on an invoice. What follows is the mechanical part — where the tonnage came from, which lines are per foot and per opening, and the six items customers call about after they open the envelope.

What does a filled-out HVAC replacement invoice look like?

Treat every rate as one shop’s number in one market. Equipment cost, tech wages, and permit fees move enormously by region and by season, so lift the structure and price it from your own costs the way hvac pricing guide works through it.

---

INVOICE #2026-0553 · Issued June 18, 2026 · Balance due on commissioning Ravenel Heating & Air · Mechanical license #M-22841 Property: 408 Dellwood Court · Permit #MECH-2026-1177, inspection passed June 18 Proposal reference: E-2026-0412, signed May 30

Equipment: 2.5 ton (30,000 BTU/h) heat pump, 16.2 SEER2 / 8.1 HSPF2, matched air handler with 5 kW backup heat. Models and serials recorded, AHRI reference number on file.

#	Description	Qty	Rate	Amount
1	Manual J load calculation, room by room, plus Manual S equipment selection — report delivered with proposal	1	$285.00	$285.00
2	Outdoor heat pump — 2.5 ton, 16.2 SEER2 / 8.1 HSPF2, model and serial recorded	1	$3,140.00	$3,140.00
3	Indoor air handler and factory coil, AHRI-certified match to line 2, 5 kW backup heat element	1	$2,060.00	$2,060.00
4	Line set — new 3/8 in liquid and 3/4 in suction per manufacturer table, insulated, wall penetration flashed and sealed	24 lf	$18.50	$444.00
5	Refrigerant weighed in above factory charge — 9 ft of 3/8 in liquid line past the 15 ft allowance, at the manufacturer’s 0.6 oz per foot	0.4 lb	$42.00	$16.80
6	Composite equipment pad, leveled on compacted base, unit set on isolation grommets	1	$165.00	$165.00
7	Electrical — 30 A/2P breaker, disconnect, whip, bonding, low-voltage control wire replaced	1	$410.00	$410.00
8	Condensate — primary and secondary drains, trap, overflow pan, float switch	1	$310.00	$310.00
9	Return replaced — 14 in flex removed, 16 in rigid drop and new 20×25 filter cabinet installed; measured 0.91 in w.c. total external static before	1	$780.00	$780.00
10	Supply plenum fabricated on site, sealed with mastic, R-8 wrapped	1	$495.00	$495.00
11	Two supply runs added to rear bedrooms — Manual J showed those rooms 1,900 BTU/h short	2	$340.00	$680.00
12	Thermostat, installed and configured for heat pump staging and backup heat lockout	1	$340.00	$340.00
13	Installation labor — 2 technicians on site 11 hours, 7:10 a.m. to 6:20 p.m.	22 hr	$98.00	$2,156.00
14	Removal of existing system — refrigerant recovered under EPA Section 608, condenser and coil hauled and disposed	1	$290.00	$290.00
15	Mechanical permit and inspection, at cost	1	$210.00	$210.00
16	Commissioning — airflow, static, subcooling, defrost cycle, safeties, readings below	1	$195.00	$195.00
17	Credit — Manual J fee applied to system award per proposal	1	−$285.00	−$285.00

Subtotal	$11,691.80
Deposit received at scheduling	−$3,500.00
Balance due	$8,191.80

Startup readings — total external static 0.48 in w.c. after return replacement · return 74°F, supply 55°F, 19°F split · subcooling at manufacturer target · defrost cycle forced and verified · backup heat locked out above 35°F · float switch tested. Warranty — labor per contract; manufacturer parts warranty registered in the owner’s name, confirmation to follow by email. Not included — duct replacement beyond lines 9 through 11, attic insulation, panel upgrades, and drywall patching at the two new supply openings.

---

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

Because square footage does not size equipment, and the rule of thumb that says it does is why the old unit was wrong.

One ton is 12,000 BTU/h of cooling capacity. A 2.5-ton system is 30,000 BTU/h. The Manual J on this house came back at 27,400 BTU/h after accounting for orientation, window area and glazing, insulation levels, infiltration, and occupancy — so the 3-ton that was there had been oversized for fifteen years.

That matters on the invoice because the homeowner is about to ask why the new one is smaller. Oversized equipment short-cycles: it satisfies the thermostat on temperature before it has run long enough to pull moisture out, and the house ends up cold and clammy with a compressor that starts and stops all afternoon. Undersized equipment runs at design conditions and never catches up. The Manual J line is the document that proves you chose rather than guessed.

SEER2 and HSPF2 belong on the equipment lines for a different reason: they are the ratings the rebate paperwork, the utility program, and the eventual home inspection all reference. Print the model, the serial, and the ratings, and the homeowner never has to climb behind the unit with a flashlight.

Why are the outdoor and indoor units separate lines if they are one system?

Because they are two pieces of equipment with two serial numbers, and because separating them heads off the most common price objection in this trade.

The homeowner who searches the outdoor model number finds a box price and compares it to your total. Line 2 lets you answer in one sentence: that is the condenser only. The indoor unit, the coil, and the backup heat are line 3. An AHRI-certified match is what makes the pair perform at its rated SEER2, and a mismatched pair usually fails warranty registration outright.

Which HVAC lines are billed per foot, per opening, or per pound?

The equipment is the unit that gets discussed. These are the units that decide whether the job made money.

Line	Unit	What drives the quantity
Line set	linear foot	Distance from the outdoor unit to the coil, plus the vertical rise
Refrigerant above factory charge	pound	Line set length past the factory allowance, at the manufacturer’s ounces per foot
Duct trunk and branch	linear foot	Layout, not floor area
Supply runs, returns, registers	each opening	Room count and Manual D layout
Line hide, lineset cover	linear foot	Exterior run height
Condensate drain	linear foot and each	Distance to termination, plus pan and switch
Crane or lift	each	Rooftop or tight side-yard set

Line 4 is the one most often folded into the equipment price and then handed over for free. A 24-foot run needs the right diameters for that model, an insulated suction line, a flashed penetration, and a nitrogen purge while brazing. Charge for it by the foot and the number stops disappearing.

How does a service call get priced differently from this?

Different pricing model, same document shell, and the two should never be blended.

An install is priced from capacity and the parts list. A service call is priced from a flat trip or diagnostic charge, then either your hourly rate or a flat rate for the specific task, plus the part with its number. State the trip charge on the phone before you drive, then print it as its own line rather than folding it into labor. When the fee is credited on approval, show the credit as a separate negative line the way line 17 does here, so the customer watches it come off.

Maintenance plans are a third model again: a fixed price per visit or per year for a named checklist of tasks, billed on a schedule rather than on a failure.

How do I set my own numbers instead of copying these?

Build every install price from three stacks, then price the whole job once.

Equipment is cost plus a margin you decide. Use margin math, not markup math — this is where money goes missing. Equipment that costs you $2,355 marked up 33 percent gives $3,140, and that is a 25 percent margin. Multiplying by 1.25 instead would have given $2,944 and only a 20 percent margin. To hold a true 25 percent, divide cost by 0.75.

Labor is your fully burdened technician hour — wage plus payroll taxes, workers’ comp, vehicle, insurance, and unbillable time — times the install hours from your own last five changeouts, not the hours you hope for. Overhead is last year’s fixed costs divided by the number of installs you actually did, added per job. Flat-rate service tasks are built the same way: task hours times burdened cost, plus part cost, divided by one minus your margin, with the trip charge on top. Published price ranges are a check against a tenfold error, nothing more, and none of them include your truck payment.

Which lines do customers push back on?

Six, almost always, and every one of them is answered with wording rather than a discount.

The line they question	What they mean	Write it like this
Equipment, $3,140	”I found this unit online for less."	"Outdoor unit only. Indoor unit, coil, and backup heat are line 3. Rated SEER2 requires the AHRI-certified pair.”
2.5 ton replacing a 3 ton	”You gave me a smaller one."	"Manual J load 27,400 BTU/h. The previous unit was oversized, which short-cycles and leaves humidity in the house.”
Return duct, $780	”The ducts already work."	"Measured 0.91 in w.c. total external static against a 0.5 rating. The old return starves the new blower and shortens compressor life.”
Labor, 22 hr	”You were here one day."	"Two technicians, 11 hours each on site, 7:10 a.m. to 6:20 p.m.”
Refrigerant, 0.4 lb	”It comes precharged."	"Factory charge covers 15 ft of line set. This run is 24 ft, so 9 ft at the manufacturer’s 0.6 oz per foot, weighed in on a scale rather than topped off by feel.”
Commissioning, $195	”That is just switching it on.”	Print the readings: static, split, subcooling, defrost, lockout, float switch

How do I explain the proposal versus the invoice?

The proposal was a priced offer for a system not yet installed; the invoice is the record of what was installed, with serial numbers on it. Keep the same line order and the same wording between the two documents, carry the proposal number in the header, and show both figures whenever a measured quantity moved — “24 lf line set (quoted 20 lf)”. Anything discovered on install day goes on as its own dated line with the approval noted, never absorbed into an existing one. If the equipment model changed because of availability, name the substitute and its AHRI match on the invoice instead of leaving the customer to notice.

What records do I keep after the HVAC invoice goes out?

The distributor invoice for lines 2 and 3, the sheet metal and fittings receipts, the permit receipt, the refrigerant purchase and the recovery record that EPA’s safe disposal requirements expect you to hold, the AHRI certificate, the warranty registration confirmation, the static pressure readings, and the photos of the old return. Those receipts are also the backbone of your hvac business expenses at filing time.

Keel is the part that happens in the van. The invoice goes out while the tech is still writing startup numbers on the clipboard — a minute on the phone, with your own numbering, your logo, your brand color, and the payment link rendered as a QR code the homeowner scans off the screen. Distributor counter tickets and the permit receipt get photographed on the spot and read on the device by Apple Intelligence: no account, no bank connection, no cloud, no login, and an App Store privacy label reading Data Not Collected. Every trip between the supply house and the job logs as mileage. The $3,500 scheduling deposit was equipment money rather than profit, which is exactly what Freeboard shows — cash minus tax reserve, minus committed work, minus a buffer. The Accountant Pack exports a CSV plus a one-page summary at year end, and the year leaves as a single file. Free covers unlimited invoices, receipts, and mileage; Keel Pro is a one-time $249.99 Lifetime purchase, not a subscription.

Frequently asked questions

How many BTU is a ton of air conditioning?

One ton equals 12,000 BTU/h of cooling capacity, so a 2.5-ton system is 30,000 BTU/h and a 4-ton is 48,000 BTU/h. Nominal tonnage is a label, not a measurement — actual output shifts with outdoor temperature, airflow, and charge, which is why commissioning readings belong on the invoice next to the tonnage.

Should an HVAC invoice show the Manual J?

Show the result and the fact that it was run. This invoice carries the load calculation as line 1 at $285, credited back on line 17 when the system was awarded. Sizing from floor area instead produces oversized equipment that short-cycles, leaves humidity behind, and wears the compressor, and it gives you nothing to point at when the customer asks why the new unit is smaller.

How do I bill refrigerant on an invoice?

By type and by weight, with the reason printed next to it. Line 5 reads 0.4 lb because the line set runs 24 feet against a 15-foot factory allowance, and the manufacturer’s table calls for 0.6 ounces per foot of 3/8 in liquid line — nine feet is 5.4 ounces, rounded up on the scale. The common mistake is topping off by pressure instead of weighing, which leaves you unable to defend the number. Note pounds recovered separately when you pull an old system, and keep the purchase and recovery records with the job.

Why is HVAC installation labor so expensive on the invoice?

Because the line covers two technicians for a full day, not one person for an hour. Line 13 is 22 hours: recovery, disconnect, removal, setting the pad and the unit, brazing and purging the line set, fabricating the plenum, hanging the air handler, wiring, condensate, thermostat, and commissioning. Print the crew size and the on-site times and the number stops looking abstract.

What is the difference between a service invoice and an install invoice?

The unit of pricing. An install is sold in tons, SEER2, feet of line set, and openings. A service call is sold as a trip or diagnostic charge plus a flat-rate task or hourly labor plus the part by number. Keep them as separate documents with separate numbering, because blending the two is what starts driveway arguments.

Do I put permit fees on the HVAC invoice?

Yes, on their own line, at cost, with the permit number and the inspection date. It reads as a pass-through instead of a markup, it proves the changeout was inspected, and it is the document that keeps the manufacturer warranty and a future home sale clean. Charging a coordination fee is fine, but list it separately from the fee itself.

---

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