For HVAC contractors

When the phone rings, we pick it up.

We answer every call, book the job, and text you the details. You stay on the truck.

No hardware. Nothing to learn. Live in 7 days.
1 in 3
calls to small HVAC shops goes unanswered
$0
average lost on a missed service call
24/7
phone coverage. Nights, weekends, holidays.
You know the drill

The phone is ringing. You're on a service call.

Jobs go to whoever picks up first. You can't pick up if you're already in a crawl space.

Voicemails don't pay.

No answer, customer calls the next shop. You never knew the job existed.

Whiteboards and sticky notes.

Half your day is reading schedules and chasing callbacks. None of it bills.

Hire an office person?

Good luck finding one. Or training one. Or keeping one.

How it works

A real conversation. Just not one you have to have.

Sounds like a service coordinator who knows your business. Asks the right questions. Sends you the details.

1

Customer calls your shop.

Forward your line, keep your number. After two rings, we pick up.

2

We ask the right questions.

Address. System type. What's wrong. How urgent. Photos by text. Emergencies route to your cell.

3

You get a text.

Name, address, system, problem, photos, time slot — already on the calendar.

Text from Sentrel — 8:42 AM LIVE
Incoming call
Linda Hernandez calling — picking up…
Sentrel
New service call booked
Linda Hernandez
412 Oak St, Springfield
AC not cooling — house is 85° — photo attached
Booked: Today, 2:00–4:00 PM
Heads up
Linda was a customer in Sept '24 (system tune-up). Repeat — text her your ETA.
You
10-4. Send her my ETA.
Built for HVAC

It works the way you already work.

Built for HVAC shops that still print invoices and schedule on a clipboard.

Knows an emergency from a tune-up.

Trained on thousands of real HVAC calls. No-cool emergencies route straight to your cell.

Photos by text, attached to the job.

Your tech rolls up knowing the system, age, and what they're walking into.

Sends ETAs automatically.

Cuts no-shows and "where's my tech?" callbacks.

Works with what you've got.

ServiceTitan, Jobber, Housecall Pro, Google Calendar — or paper.

Nights, weekends, heat waves.

The phone is always covered. Routine calls get booked for tomorrow.

You stay in charge.

Set the rules — what gets booked, what gets passed through.

We were missing 15 calls a week in the heat of summer. Sentrel paid for itself in the first month — booked two big system installs that would've gone to the next shop in the search results.
Tom R. Owner, Riverside Heating & Air
Pricing

Straightforward. No long contracts.

Flat monthly. Pay per call. That's it.

HVAC Shop Plan

For HVAC shops with 3–25 trucks.

Monthly base$299/mo
Per call answered & qualified$2.50
Per service call booked$8
After-hours coverageIncluded
Setup & onboardingFree during pilot
60-day pilot. If we don't book more service calls than we cost, you don't pay the base. Cancel anytime.

Stop losing calls to voicemail.

15 minutes. Hear what your phone sounds like with Sentrel on it.

Book a walkthrough