Built only for HVAC
Your phone, answered 24/7. Read every word she says.
Sara is Thermoi's AI receptionist. She answers around the clock, tells every caller she's an AI in her first sentence, takes the address and the problem in the caller's own words, and books the job on the line.
Sara: Thanks for calling Palm Air Heating and Cooling. This is Sara, an AI assistant for the shop. What's going on?
Caller: My AC just quit and it's 95 in the house.
Sara: Sorry to hear it. What's the service address?
Caller: 412 West Palm Lane.
Sara: Got it. I have a 2 PM slot tomorrow. Want me to book it?
Appointment booked
Wed 2:00 PM
First month free, no card. Setup is one 15-minute call, and you can cancel anytime.
52% of consumers rate after-hours AI answering as superior service. CallRail, 2025 (n=1,000)
- Coverage
- 24/7
- First sentence
- She says she's an AI
- Every call
- Summary + transcript
- First month
- Free, no card
Runs alongside the tools you already use
No rip and replace. Thermoi answers the phone; you keep running everything else. Bookings land in your Thermoi dashboard for now, and writing them into these tools is on the roadmap.
See it in action
One call, fully handled
From the first ring to a booked job, Thermoi runs the whole conversation. There's no app for you to watch and no voicemail to call back.
Answers & qualifies
Picks up every call, day or night.
My AC died and it's 95 degrees in here.
I can get a tech out today. What's the address?
412 West Palm Lane.
Books the job
On the spot, into your dashboard.
2:00 PM today
AC repair · 412 West Palm Ln
Sends you the details
Email and Slack, when the call ends.
No AC · 412 West Palm Ln
Summary and full transcript attached
Every call logged and transcribed
Wake up to a clean record of every call: who rang, what they needed, and what the AI did about it.
What your customers hear
The question every owner asks first
“Will my older customers hang up on it?” It is the fair version of the worry, so here is exactly what happens on the other end of the line.
She says she is an assistant, up front
She does not pretend to be a person, and she does not put on an accent to cover it. She tells every caller what they are talking to at the start, before they explain their problem. Several states now require that disclosure by law, so it is a feature we would build anyway.
Asking for a person gets a callback, not a phone tree
If a caller would rather talk to someone, Sara says so plainly: she takes their name, number, address and what they need, and someone from your shop rings them back. She will not put them through and she will not pretend she can. Nobody is trapped in a phone tree, and nobody is left on hold waiting for a human who is on a roof.
You see exactly what was said
Every call comes back as a full transcript and a written summary, with the booking attached when there is one. If a call goes badly you can read it word for word rather than guess.
The free month is the honest test of all this. It runs on your real line with your real customers, and if they hate it you have lost nothing but the setup call.
How it works
Live in three steps, zero technical work
Keep your number and your tools. We handle the rest.
Connect your phone
Keep your existing business number. You forward it to Thermoi when you are ready, with no technical work on your end.
AI answers 24/7
Our HVAC-built AI picks up every call, day or night, and takes the caller’s name, number, service address and what is wrong.
Wake up to booked jobs
It asks what the caller needs, books the job when there is one, and every call comes back as a summary and a full transcript. You start the day reading calls instead of voicemails.
See the AI handle real HVAC calls in 15 minutes
Built for HVAC
Made for the calls your business actually gets
Thermoi is built for HVAC rather than adapted from a generic phone script. A dead furnace and a filter question need different questions asked, and it asks them.
Emergency no-heat / no-cool
A dead furnace at 2 AM, an AC out in a heat wave. Thermoi answers instead of the voicemail box, and the address and the problem come back to you with the transcript.
After-hours emergency callsAfter-hours & weekends
Nights, Sundays, holidays. Every caller gets a real answer instead of a voicemail box and a callback that never comes.
24/7 AI phone systemNew appointment booking
Asks what the job is and agrees a time while the customer is still on the line, with the service address and arrival window recorded.
Appointment bookingPricing & quote questions
Answers the questions you get a hundred times a week, then captures the lead and sets up the estimate.
Lead qualificationExisting customers
Reschedules, confirms appointments and takes a proper message, without putting anyone on hold to do it.
Meet Thermoi VoicePeak-season overflow
First heat wave of the year and every line is ringing? Thermoi picks up all of them at once, so nobody gets a busy signal.
24/7 AI phone systemOnboarding
Four steps to live on your line
Here is exactly what happens after you book a demo and decide to go ahead. You keep your number, your phone never goes down, and nobody needs an engineer.
Onboarding call
A Thermoi specialist walks through your call types, your services and how you want the phone answered. About 20 minutes, and the only thing we need from you.
Agent setup
We configure the AI with your business name, greeting, services and service area, and set who receives the email or Slack notification after each call. You do not have to build or install anything.
Testing & sign-off
We run live test calls against your real scenarios so you can hear exactly how it handles them. You approve before anything goes live.
Live on your line
Your existing number starts routing to Thermoi. It answers every call around the clock, books jobs, and sends each call back to you as a summary and a full transcript.
A 15-minute call, and setup only starts if you decide to go ahead.
The problem
The phone is where the jobs leak out
These are not our numbers. We have nothing of our own to quote yet, so they come from other people's research into how phone calls actually get handled.
- 39%
- of phone leads never reach a person
- Invoca, 2025, from an analysis of over 60 million calls
- 34%
- of calls arrive outside business hours
- CallRail, 2025. Those callers are also 24% likelier to book.
- 52%
- of consumers call after-hours AI answering better service
- CallRail, 2025, from a survey of 1,000 consumers
ROI calculator
See what missed calls are costing you
Drag the sliders to match your shop. We'll estimate the revenue Thermoi could recover for you every month.
Your business
Your revenue potential
First month free · No card · 15-min setup call
This is a ceiling, not a forecast. It takes the calls you say you are missing, assumes every one of them got answered, and assumes about a third of them would have become booked jobs. We have no answer rate of our own to quote you, which is what the free month is for.
Pricing
Start with a free month
No card, no contracts and no setup fees, with 90 days to change your mind.
Start risk-free
Your first month is free
No card, no setup fee. Thermoi answers your real calls for a month. At the end of it you get a report (calls answered, appointments booked, recordings) and you either pick a plan or walk away.
- Live on your own line
- Full call transcripts
- Cancel anytime
After the free month: a monthly plan from $299, or pay per booked appointment.
The first month is free. After that, monthly plans start at $299, or you can pay per booked appointment. What you pay depends on how many calls you actually take, so we look at your numbers on the demo and tell you which plan covers it.
One to three trucks.
- Answers every call, 24/7
- After-hours and weekend coverage
- Appointment booking
- Full call transcripts
- Email support
Three to fifteen trucks.
- Everything in Starter
- Books the job on the call
- Answers the way your shop talks
- Dashboard and recordings
- Priority phone support
More than one location, or heavy volume.
- Everything in Professional
- Reporting by location
- Custom integrations
- A named account manager
- SLA guarantee
All plans include a 90-day money-back guarantee · Cancel anytime · No long-term contracts
FAQ
Questions, answered
The questions HVAC owners ask us most about AI phone answering.
Thermoi answers your business calls 24/7 with an AI built specifically for HVAC. It asks what the caller needs, takes their name, number, service address and what the equipment is doing, and books a time when they want one. When the call ends you get a summary and the full transcript, and you can have both emailed to you or posted into Slack. It sounds natural and professional, like your best receptionist would.
Still have questions? Book a free demo and we'll answer everything live.
Book Your Free AI Demo
See how Thermoi Voice can transform your HVAC business in just 15 minutes
Schedule Your Demo Call
Choose a time that works for you, and we'll show you exactly how Thermoi Voice works for HVAC.
You'll get a Google Meet link by email. Calendar not loading? Open the booking page directly.
Book Your Slot
Choose any 15-minute slot that fits your schedule
Live AI Demo
Hear how Sara answers, what she asks, and what comes back after the call
Custom Analysis
Get a personalized ROI calculation for your business