System replacement is the job every HVAC shop chases. It is the biggest ticket on the board, it fills the shoulder seasons, and it is the number owners quote when someone asks how business is going.
It is also, dollar for dollar, the least profitable work most residential shops do. Not unprofitable. Just worth about half what a service call is worth per dollar invoiced, for reasons that show up clearly once the material cost is separated from the labor.
Here is the full arithmetic at a $135 loaded rate, with real hours and real material, and what it means for how you should be quoting these.
What replacement actually covers
Four different jobs get called a system replacement, and they price nothing alike.
Condenser only. Outdoor unit swapped, existing coil and air handler stay. Five to six hours. Cheapest path and the one customers ask for by name, though as of 2026 it is rarely the right call because a new A2L condenser and an older R-410A coil are not a matched system.
Condenser plus evaporator coil. The real A/C changeout. Eight to ten hours. This is what most people mean.
Furnace replacement. Six to eight hours depending on efficiency and size. A 96% condensing furnace adds venting work an 80% unit does not need.
Heat pump system. Eight to ten hours, and the highest material cost in residential work.
Where the hours actually go
Take the 3-ton condenser and coil changeout, eight billable hours, at $2,385 in equipment and material.
| Phase | Hours | What happens |
|---|---|---|
| Recovery and removal | 1.25 | Recover refrigerant to EPA requirements, disconnect, pull the old condenser and coil |
| Set and mount | 1.50 | Pad prep and level, set the unit, coil into the plenum, transition sheet metal |
| Line set | 1.75 | Reuse or replace, braze with nitrogen flowing, insulate, support |
| Electrical and controls | 1.00 | Whip, disconnect verification, low voltage, thermostat compatibility |
| Evacuation | 1.25 | Pull to 500 microns and hold, decay test |
| Charge and commission | 1.25 | Weigh in charge, superheat and subcooling, airflow, document |
| Cleanup and haul-off | 0.50 | Site clean, old equipment to the scrap yard or disposal |
| Total | 8.50 | Book figure is 8.0, which assumes nothing goes wrong |
The half hour of daylight between the book figure and the honest one is worth naming. Eight hours is the clean version. Every phase above has a bad day in it, and evacuation is the one that most often turns a same-day job into a next-morning return.
The prices
| Job | Hours | Material | Good | Better | Best | Margin |
|---|---|---|---|---|---|---|
| Condenser only, 2 ton | 5 | $1,285 | $2,950 | $3,680 | $4,570 | 18% |
| Condenser only, 3 ton | 5 | $1,585 | $3,350 | $4,190 | $5,190 | 16% |
| Condenser only, 4 ton | 6 | $1,985 | $4,130 | $5,170 | $6,410 | 16% |
| Condenser only, 5 ton | 6 | $2,385 | $4,670 | $5,840 | $7,240 | 14% |
| Condenser + coil, 2 ton | 8 | $1,985 | $4,620 | $5,770 | $7,160 | 19% |
| Condenser + coil, 3 ton | 8 | $2,385 | $5,160 | $6,450 | $8,000 | 17% |
| Condenser + coil, 4 ton | 10 | $2,985 | $6,450 | $8,070 | $10,000 | 17% |
| Condenser + coil, 5 ton | 10 | $3,485 | $7,130 | $8,910 | $11,050 | 15% |
| Gas furnace, 80% AFUE | 6 | $985 | $2,780 | $3,480 | $4,310 | 23% |
| Gas furnace, 96% AFUE | 6 | $1,485 | $3,460 | $4,320 | $5,360 | 19% |
| Electric furnace | 5 | $785 | $2,270 | $2,840 | $3,520 | 24% |
| Oil furnace | 8 | $1,685 | $4,210 | $5,270 | $6,530 | 20% |
| Heat pump, 3 ton | 8 | $2,685 | $5,560 | $6,950 | $8,620 | 15% |
| Heat pump, 5 ton | 10 | $3,685 | $7,400 | $9,250 | $11,470 | 15% |
The number nobody wants to look at
Read the margin column against a service call. A dual run capacitor returns 42%. An A/C tune-up returns 41%. A 5-ton heat pump changeout, the biggest ticket in residential HVAC, returns 15%.
The $11,470 job produces about $1,075 of gross profit. Seven capacitors produce about $520 and take three and a half hours total.
The reason is that replacement is a material business wearing a labor business costume. On a 5-ton heat pump, $3,685 of the cost is equipment. That money passes through you. You mark it up 35% and that markup is real, but it is markup on someone else's manufacturing, and it does not scale with your skill or your speed. The eight to ten hours of labor is the only part you actually control, and on a $7,400 ticket it is a minority of the total.
This is not an argument against doing changeouts. It is an argument against the very common mistake of measuring the business by revenue and wondering why the bank account does not match. A shop doing $600,000 in replacements and a shop doing $300,000 in service can end the year in roughly the same place.
What it does argue for: charge separately for the work that surrounds a changeout. Duct modifications, line set replacement, electrical upgrades, condensate reroutes, pad and clearance corrections. That work carries service-call margins and it gets bundled into the changeout price constantly, which is how a 17% job becomes a 12% job.
What this looks like at your rate
| Job | $110 rate | $135 rate | $165 rate |
|---|---|---|---|
| Condenser + coil, 2 ton | $4,260 | $4,620 | $5,050 |
| Condenser + coil, 3 ton | $4,800 | $5,160 | $5,590 |
| Gas furnace, 96% AFUE | $3,190 | $3,460 | $3,780 |
| Heat pump, 3 ton | $5,200 | $5,560 | $5,990 |
A 50% increase in labor rate moves a 3-ton changeout by 16%. Compare that with a TXV replacement, where the same rate increase moves the price 38%.
That is the practical consequence of a material-heavy job. If you are underpriced across the board, raising your labor rate fixes your service pricing quickly and barely touches your replacement pricing. Replacement gets fixed by your equipment margin and by charging for the surrounding work, not by your hourly.
The A2L conversation
Every quote in 2026 has a refrigerant conversation attached whether you raise it or not. New residential systems are R-454B or R-32. R-410A equipment can no longer be installed in new systems, and the existing fleet is still out there and still gets serviced.
What that means at the kitchen table: a customer asking to replace only the condenser on an R-410A system is asking for a mismatch. The honest answer is that the coil goes too, which is why the two-piece changeout is the real job and the condenser-only line exists mostly for warranty work and matched replacements.
Say it before you quote, not after. A customer who hears "$3,350" and then hears "actually $5,160" has been given a reason to call someone else.
Where this job loses money
Bundled scope. Duct modifications, a new line set, an electrical upgrade, a condensate pump. Each one is real work at real margin and each one gets absorbed into the changeout number to keep the quote clean. That is the single largest leak on this job type.
The evacuation that will not hold. Budgeted at 1.25 hours. A system that will not pull to 500 microns turns into a leak hunt, and a leak hunt turns an eight hour job into a return trip. Nothing in the price covers that.
Equipment quoted at last quarter's cost. Material is more than half the ticket. A price book with stale equipment costs is not slightly off on a changeout, it is off by hundreds of dollars per job.
Permit and inspection time. Pulling the permit, meeting the inspector, correcting a flag. None of it is in the eight hours and all of it happens.
Haul-off treated as free. Half an hour and a disposal fee on every changeout. Small on its own, and it is on every single one of these jobs.
The bottom line
Residential system replacement prices at 5 to 10 billable hours plus equipment, and lands between $2,270 for an electric furnace and $11,470 for a top-tier 5-ton heat pump. The margins run 14% to 24%, which is roughly half what the same shop earns on service work.
Chase the changeouts. They fill the calendar and they are how customers find you. Just do not mistake the revenue for profit, and charge separately for everything that happens around the equipment, because that surrounding work is where the actual margin on this job lives.
Frequently Asked Questions
How long does a typical system replacement take?
8-10 hours for a clean 3-ton AC system replacement with a single tech. With a helper or a two-person crew, faster. Customers should plan for one full day with no AC, but the work is usually done by end of day.
Should I quote the new system AND the old system removal?
Always include removal and disposal of the old equipment in the quote. Customers don't want to think about hauling the old condenser to the curb. Make it included by default.
What about the customer who wants the cheapest possible quote?
Quote the builder-grade option as your "good" tier. Quote a mid-tier as your "better." Quote a high-efficiency premium system as your "best." Let them choose. The customer who only wants the cheapest is sometimes still the right customer if the cheapest option is honestly priced and you're upfront about what they're not getting.
How do I handle financing questions?
Most successful HVAC operations have a financing partner (Synchrony, Greensky, etc.) that handles consumer financing for big-ticket purchases. Without financing as an option, customers often defer or shop the lowest-cost competitor. Set this up before you need it.
What's the warranty look like on a new system?
Equipment manufacturer warranty is typically 10 years on parts (sometimes registration-required), 5 years on labor (varies by manufacturer). Your shop's labor warranty on the install itself is typically 1-2 years. Make this clear in the quote so the customer knows what's covered when.