How does this HVAC voice AI ROI calculator work?

It models the two numbers that matter for an HVAC shop: how many inbound calls go unanswered, and what each answered call is worth. You enter monthly call volume, missed-call rate, average service ticket, and booking rate. The calculator assumes an AI answer desk picks up the calls that currently ring out, applies your booking rate to convert them into jobs, and multiplies by ticket value. It then runs the same math on peak-season months, where call volume jumps by your multiplier, and blends 9 shoulder months with 3 peak months into an annual figure. Finally it divides recovered revenue by the AI cost you entered to give an ROI multiple and payback period. Everything runs in your browser, no email required.

Why do HVAC companies miss so many calls?

Because demand is spiky and the people answering phones are also dispatching techs. Industry studies consistently put home-services missed-call rates at 25-30% during business hours, and much higher after hours and on weekends. For HVAC specifically it gets worse exactly when it matters most: a heat wave or cold snap can double inbound volume overnight, and a two-person office cannot scale to match. The brutal part is that an unanswered emergency call rarely leaves a voicemail. The homeowner just dials the next company on Google. That means the calls you miss during peak season are disproportionately high-intent, high-ticket emergency jobs, which is why the peak-season line in this calculator moves the annual number so much.

What is a realistic average service ticket for HVAC?

It depends on your mix of repair, maintenance, and replacement work. A straightforward diagnostic-plus-repair visit typically lands between $250 and $600, which is why the calculator defaults to $450. Maintenance-plan visits are lower, but they feed the pipeline for replacements. Full system replacements run $5,000 to $12,000 or more, and even one recovered replacement lead per month changes the math dramatically. If you want a conservative estimate, use your average repair ticket. If you want the true picture, take last quarter's total revenue divided by total completed jobs and enter that instead. Shops that track revenue per booked call usually find the number is higher than they guessed, because emergency after-hours calls skew toward bigger tickets.

Can an AI voice agent really book HVAC service calls?

Yes, and scheduling is the use case where voice AI is already strongest. A well-built agent answers on the first ring, greets the caller by company name, asks the diagnostic questions your CSR would ask (no cooling or no heat, system age, is water leaking), checks availability, and books the appointment directly into the calendar or field-service software. It handles after-hours and overflow calls identically to 2 PM calls, which is where most of the recovered revenue in this calculator comes from. It also knows its boundaries: gas-leak or safety calls get escalated to a human or emergency line immediately. The goal is not replacing your office staff, it is making sure a $450 job never goes to a competitor because the phone rang out.

I run an agency. How do I sell this to HVAC clients?

Lead with their number, not your product. Run this calculator on a prospect's real call volume during the demo, or send them a link with your inputs encoded in the URL, and let the annual figure do the talking. HVAC owners are operators; a claim like 'AI answers your phones' is ignorable, but '$97,000 a year currently going to voicemail' is not. Anchor your pricing against recovered revenue: if the tool shows $8,000 a month recovered and you charge $500 to $1,500, the ROI conversation is over before it starts. Agencies running on Hermes deploy the agent under their own brand, connect the client's calendar, and bill the client directly, keeping 80%+ margin on every account.

What does it cost to run this on Hermes?

Hermes plans start at $149/month for Starter (3 workspaces, 300 included minutes), $399/month for Business (7 workspaces, 1,000 minutes), and $699/month for Agency (20 workspaces, 2,000 minutes), with overage at $0.24/minute across all plans. One HVAC client doing a few hundred answered minutes a month fits comfortably inside Starter, and each additional client gets its own workspace with its own agents, phone numbers, and CRM. If you charge that client $1,000 to $1,500 a month, the platform cost per client is a rounding error against your margin. Everything is white-label, so the HVAC shop sees your brand, your portal, and your invoice. Your clients never see the word Hermes.

free tool

HVAC voice AI ROI calculator.

Put a dollar figure on the HVAC service calls that ring out today, including the peak-season surge, and see what a 24/7 AI answer desk recovers. Built for agencies pitching HVAC shops and for shop owners doing the math themselves.

/ inbound calls per month (off-season)/ missed-call rate %Industry benchmark for home services is 25-30% during business hours, higher after hours./ peak-season call multiplierHow much call volume jumps in a heat wave or cold snap month. 1.5-2x is typical./ average service ticket ($)/ booking rate of answered calls %/ monthly AI answering cost ($)What an agency typically charges an HVAC shop for a 24/7 AI answer desk.

/ result

$202,881

Revenue recovered per year from calls that currently ring out

59 → 95 missed calls/mo

Off-season vs peak-season calls you never pick up today

451 extra jobs/yr

Booked from recovered calls at your booking rate, $23,522 in a peak month alone

33.8x ROI · 2-day payback

Against the monthly AI answering cost you entered

Selling this to HVAC shops as an agency? Book a 20-min walkthrough and see how to deliver it under your own brand at 80%+ margin.

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Your inputs are encoded in the URL. Send it to a colleague or prospect and they see the same numbers.

how it works

The math behind the missed-call number.

HVAC is the most seasonal business in home services, and that seasonality is exactly what breaks phone coverage. In a shoulder month, a two-person office can answer most calls. In the first week of a heat wave, inbound volume can jump 60-100% overnight while your CSRs are simultaneously dispatching techs, ordering parts, and calming down customers whose systems died at 9 PM. The calls that ring out in those weeks are not tire-kickers. They are no-cool emergencies from homeowners ready to pay whatever it takes today, and they do not leave voicemails. They call the next result on Google.

This calculator separates the year into 9 off-season months and 3 peak months. For each, it multiplies your inbound call volume by your missed-call rate to estimate calls that go unanswered, applies your booking rate to convert recovered calls into jobs, and multiplies by your average service ticket. The peak months use your call multiplier, which is where most shops discover the bulk of their lost revenue hides. The ROI line compares annual recovered revenue against twelve months of the AI answering cost you entered.

The assumptions are deliberately conservative. It assumes the AI only recovers calls you currently miss, ignoring the follow-up calls, maintenance-plan renewals, and replacement leads a well-built agent also produces. It assumes booked jobs at your normal ticket value, even though after-hours emergency work usually bills higher. If the number the tool shows you is big, the real number is bigger. Adjust the inputs to your own call logs, then send the link to a colleague or a client. Every input is encoded in the URL.

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HVAC voice AI ROI calculator.

The math behind the missed-call number.

Common questions.

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