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Case studyExample business, real tools, estimated numbers

Seven AI agents run the back office of a one-man HVAC shop

In this case study, seven AI agents run the paperwork of a one-van heating and cooling business in Minneapolis on the first hard freeze of the year. They answer the calls he misses, asking about gas first, turn his voice notes into invoices in Jobber, chase late payments, follow up open quotes, register new installs for the warranty and text him a brief at 6:30 AM. Prices, diagnoses and anything with gas stay with him.

The video loads from YouTube only when you press play.

Business
Becker Heating & Air, Minneapolis, Minnesota
Size
One owner who is also the only technician, one van
The day
Friday, October 16, the first hard freeze, to the 6:30 AM brief on Saturday
Agents
Seven: Calls, Invoices, Payments, Quotes, Tune-ups, Warranty and Otto, who writes the brief
Tools
Jobber QuickBooks Wisetack Goodman
Build time (estimate)
About two weeks, then the AI officer plan
9of 9
invoices sent from the van the same day (from written at 10 PM)
One day
6:15PM
home for dinner (from paperwork in the van until 10 PM)
One day
0
warranty windows missed (from a card left in the glovebox)
Estimated
Cover of the guide: The Solo HVAC AI Back Office

Free guide · PDF · 79 pages

The Solo HVAC AI Back Office

Implementation guide for one-truck HVAC owners: the seven agents with their build specs, the rules, the rollout and the templates.

View the guide Download PDF

The situation

Tom Becker runs Becker Heating & Air alone: one van, his phone, Jobber for jobs and invoices, QuickBooks for the books. He is good at the work. His first call on the first hard freeze is a furnace whose burners light, then shut off: a dirty flame sensor, twenty minutes to fix.

The work around the job is the problem. Owners of HVAC shops with fewer than ten people say they spend more than fifteen hours a week on paperwork, according to HVAC School's 2025 survey. And the phone does not wait: Invoca's 2026 benchmark found that only about half of home-service calls reach a person. When Tom is in an attic, his phone rings in his pocket.

By ten that night he is still in the van, with a voicemail from a customer whose kitchen is at 58°F and nine invoices he has not sent.

How the day used to go

Calls go to voicemail while he works, and he returns them between jobs, if the caller has not already found someone else. Invoices get written in the evening, from memory and receipts on the passenger seat. Late payments get chased when he remembers. Quotes he wrote last week go cold because nobody follows up, and the warranty card for Tuesday's new furnace sits in the glovebox.

Nearly three in five small businesses carry invoices more than 30 days overdue, according to Intuit's 2026 late payments report. For a solo shop, that is the money for next week's parts.

The agents

Seven agents, one per job. Tom keeps his phone, Jobber and QuickBooks; the agents plug into them.

OttoBrief

Runs the agents and texts Tom one brief at 6:30 AM: today's jobs, open quotes, unpaid invoices, parts to pick up, and the two decisions only he can make.

Reads and summarizes; never changes a job or a price.
Calls

Picks up when Tom can't, says it is his AI assistant, asks about gas and carbon monoxide first, and books only the slots Tom opened.

Never troubleshoots. A gas smell means: leave the house, call 911.
Invoices

Turns the job Tom says out loud in the van into an invoice in Jobber, adds the parts, and sends it with a card link.

Never invents a line or a price; it uses his price book.
Payments

Sends a polite reminder at seven days. At thirty days, it hands the customer to Tom.

Never threatens, adds fees or handles a dispute.
Quotes

Follows up every open quote on day two and day five, with the financing Tom already offers through Wisetack.

The price never changes. No discounts.
Tune-ups

Texts past customers who are due for fall maintenance and said yes to texts, so slow mornings fill up.

Never texts anyone who did not opt in.
Warranty

Prefills the manufacturer's registration from the data plate photo and the job, and reminds Tom well before the window closes.

Tom checks and submits; the homeowner gets the confirmation.

Step through the day

Press play, or tap any time, to follow one Friday from the attic to the morning brief.

Friday, the first hard freeze
2:40 PM
Calls

Tom is in an attic with a dirty flame sensor. His phone rings; the AI picks up, asks about gas first, and books the caller into a slot Tom opened.

Diagnosis waits for Tom. The AI only books.
1 / 9

The stack

We did not replace anything. The agents work inside the tools Tom already pays for.

Jobber, jobs and invoices QuickBooks, the books Wisetack, financing Goodman, warranty Claude, the agents
  • Jobber holds his schedule, his price book and his invoices. Calls books into it, Invoices writes into it, Quotes follows up from it.
  • QuickBooks keeps the books. Payments reads which invoices are open and how late they are.
  • Wisetack is the financing Tom already offers. Quotes mentions it; it never changes the terms.
  • The manufacturer's registration (Goodman in this case study) is prefilled from a photo of the data plate.
  • His phone number stays the same. Missed calls forward to the AI after a few rings.

Before and after

JobBefore (typical)With agents
Calls while on a jobVoicemail, returned between jobsAnswered, gas question first, booked into open slots
InvoicesWritten at night, from memorySaid out loud in the van, sent with a card link
Late paymentsChased when he remembersReminder at 7 days, Tom calls at 30
Open quotesGo coldFollowed up on day 2 and day 5, same price
WarrantyCard in the glovebox, window missedPrefilled, reminder well before day 60
MorningTen minutes of scramblingOne text at 6:30 AM, two decisions
 Before: a typical solo shop, estimated. With agents: the day in this case study.

The value, and how we estimated it

Counted in hours and outcomes, with each assumption written out so you can redo the math with your own shop's numbers.

ValueEstimateHow we estimated it
Evenings backabout 10 hours a weekOwners of small shops report more than 15 hours a week of paperwork (HVAC School, 2025). We assume the agents take two thirds.
Invoices out the same dayall of themA voice note from the van becomes a Jobber invoice with a card link.
First payment reminderday 7Payments sends the first reminder at seven days and hands day 30 to the owner.
Warranty registrations missednonePrefilled from the data plate, with a reminder well before the 60-day window.
 Estimates, with every assumption shown.

How a build like this would run

Estimated for a one- to three-person shop on Jobber or Housecall Pro and QuickBooks.

  1. Week 1

    Map

    Ride along for a day, read a month of invoices, write the safety script and the booking rules with the owner. Agree on the result, for example: every invoice sent the same day, and every missed call answered.

  2. Week 2

    Build

    Calls and Invoices first, because they free the evening. Then Payments and Quotes, then Warranty and the brief.

  3. Day 30

    Prove

    Measured from Jobber and the phone log: invoices sent the same day, calls answered, quotes followed up.

  4. Every month

    Stay

    A report, seasonal changes (tune-ups in fall, cooling checks in spring), and one improvement a month.

What stays with the owner

The agents do the paperwork. Prices, diagnoses and anything with gas stay with Tom.

Gas and carbon monoxideThe script says: leave the house, no switches, call 911 or the gas utility from outside, then alert Tom. No troubleshooting, ever.
DiagnosesThe AI books the visit. What is wrong with the furnace is Tom's call.
PricesInvoices and quotes use his price book. No discounts, no new lines.
Texts only with consentReminders and tune-up offers go only to customers who said yes, with an easy way to stop.
Money disputesAnything past 30 days, any refund or disagreement goes to Tom.

What's in the guide

The full implementation guide behind this case study, 79 pages, free to read and to download. Built so a shop owner, or whoever builds the system with them, can follow it.

  1. The business reality: the numbers, the daily workflow and the tools already in place, with sources.
  2. One night with Tom Becker, from the attic to the morning brief.
  3. The seven agents: a job card and a build spec for each, and the knowledge they share.
  4. The rules: gas safety, licensing and refrigerant, texts and consent, warranty windows, payments.
  5. Build and run it: the stack, the data flow, the 30-60-90 day rollout, supervision and the numbers to track.
  6. Templates and appendices: the Claude skill and nineteen shop files, scripts, a glossary and every source.

View the guideDownload PDF

Where the numbers come from

The tools, the warranty rules and the safety script are real. The shop, the people and the invoices are invented for this case study, and the before and after are estimates.

  • Owners of HVAC shops under ten employees spend more than fifteen hours a week on paperwork: HVAC School, HVAC Industry Pulse 2025 (survey of 1,300+).
  • 52% of inbound home-services calls answered by a person, July 2026 data: Invoca home services benchmarks 2026.
  • Nearly three in five small businesses carry invoices more than 30 days overdue: Intuit QuickBooks 2026 Small Business Late Payments Report, as cited in Jobber's home service report.
  • Register within 60 days, or a gas furnace is covered 5 years instead of 10 for parts: Goodman warranty.
  • 440,900 HVAC mechanics and installers in the US, 2025: US Bureau of Labor Statistics.
Read the video transcript

Karen (voicemail): It's fifty-eight degrees in here. Are you coming?

Tom: Nine invoices... and I haven't sent one.

Narrator: I built seven AI agents for a one-man HVAC shop, so he stops doing paperwork in his van at ten PM. Here's one night.

Narrator: Tom Becker runs Becker Heating and Air alone. One van, Minneapolis. Friday, October sixteenth, the first hard freeze.

Narrator: His first call: the burners light, then shut off. A dirty flame sensor. Twenty minutes to fix.

Narrator: The work around the job is the problem. Owners of small HVAC shops spend about fifteen hours a week on paperwork.

Narrator: So we didn't replace anything. Tom keeps his phone, Jobber and QuickBooks. The agents plug into them.

Narrator: First, calls. Only about half of home-service calls reach a person. When Tom is in an attic, the AI picks up.

Calls (AI): Becker Heating and Air, this is Tom's AI assistant. He's on a job. How can I help?

Gary: Yeah, our furnace quit. It's blowing cold air. Sixty-one in here.

Calls (AI): First, do you smell gas, or is a carbon monoxide alarm going off?

Gary: No. Nothing like that. Just cold.

Calls (AI): Okay. If that changes, leave the house and call 911. Tom's first opening is seven thirty tomorrow. Should I book it?

Gary: Yes, please.

Calls (AI): Booked. You'll get a text with Tom's photo tonight.

Narrator: Next, invoices. Tom says the job out loud in the van. The agent writes the invoice in Jobber, adds the parts, and sends it with a card link. Nine invoices, out before he's home.

Narrator: Then, payments. Nearly three in five small businesses have invoices over thirty days late. At seven days, a polite reminder. At thirty, it goes to Tom.

Narrator: Quotes. Every open quote gets a follow-up on day two and day five, with the financing he already offers. The price never changes.

Narrator: Tune-ups. Past customers due for fall maintenance get a text, and slow mornings fill up.

Narrator: Warranty. Every new install is registered with the manufacturer. Miss Goodman's sixty-day window, and a ten-year parts warranty drops to five.

Narrator: And at six thirty, the brief.

Otto (AI): Morning, Tom. Two things need you. The Patel furnace quote: send it with Wisetack financing?

Tom: Yeah. Send it.

Otto (AI): And Mr. Hale is thirty days late. Final reminder, or will you call?

Tom: I'll call him. He's a good guy.

Otto (AI): Got it. First job's at seven thirty.

Narrator: The rule: the agents do the paperwork. Prices, diagnoses and anything with gas stay with Tom.

Narrator: Nothing about his work changed. He just got his evenings back.

Narrator: Comment HEAT, and I'll send you the full blueprint, free.

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