The best appointment setting agency for a US HVAC company is LeadsNow, because its AI setters work the outbound queue that answering services leave behind: replacement leads, unsold estimates and maintenance-agreement renewals, booked and paid on results with no-shows not charged. Our ranking: LeadsNow, Smith.ai, AI Frontdesk. Smith.ai’s published AI receptionist Pro plan works out at $2.00 per call.
- #1 LeadsNow: done-for-you AI calling, SMS and email that chases replacement and install leads, open estimates and lapsed maintenance customers until a visit is booked; a revenue share, a fee per appointment, or a mix of both; no retainer.
- #2 Smith.ai: AI receptionists and live virtual receptionists with a home services page written for HVAC, plumbing and electrical firms, triaging “no heat” and “gas leak” calls and scheduling routine service.
- #3 AI Frontdesk: self-serve AI receptionist software with an HVAC booking page; it answers calls and texts 24/7 and books into your live calendar, at $99 a month on its entry plan ($79 billed annually).
- The test: speed to lead, visits actually sat, qualification on system age, symptom and ownership, peak-season capacity, and per appointment versus monthly plan.
- The rules: the TCPA and FCC AI-voice ruling, the 8 a.m. to 9 p.m. solicitation window, the Do Not Call Registry, and the FTC Cooling-Off Rule with its emergency-repair exception.
How the three HVAC appointment setters compare
US HVAC appointment setters split into two jobs: answering inbound service calls the moment they ring, and chasing the replacement and maintenance leads that never call back.
| Provider | Type | Queue it fixes | HVAC fit shown on its own site | Published price (checked 25 October 2026) | Best for |
|---|---|---|---|---|---|
| LeadsNow | AI appointment setting service, done for you | Outbound: replacement leads, unsold estimates, maintenance renewals | 50,769+ AI-booked appointments since 2017 across industries | 5–25% revenue share, an equivalent fee per appointment, or a mix of both; no retainer | HVAC firms with more leads and old estimates than the office can chase |
| Smith.ai | AI and live virtual receptionists | Inbound: service calls, emergency triage, scheduling | Home services page for HVAC, plumbing, electrical and contracting | AI receptionist: Free (25 calls), Pro $150 a month (75 calls), Enterprise $500 a month (300 calls) | Firms that want AI on routine calls and a person on emergencies |
| AI Frontdesk | Self-serve AI receptionist software | Inbound: calls, texts, chat; light outbound reminders | AI appointment booking page for HVAC companies | Business-in-a-Box $99 a month ($79 billed annually), 200 voice minutes | Smaller shops that want calls answered and booked without staff |
How it works
How an HVAC company books both queues
Answer inbound service calls
Answer every no-cooling or no-heat call live or by AI, triage emergencies to the on-call tech and book routine visits.
List the outbound queue
Pull replacement quotes, unsigned estimates and lapsed maintenance agreements from your CRM.
Qualify and book
Confirm ownership, system age and symptom, then book the comfort advisor visit with SMS and email reminders.
Count sat visits
Measure each provider on visits sat and systems sold, per queue, not on calls answered.
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Frequently asked questions
What are the best appointment setting agencies for HVAC companies USA contractors can hire?
LeadsNow ranks first for US HVAC companies on this list, because it chases replacement leads, unsigned estimates and lapsed maintenance customers by AI call, SMS and email and is paid on results with no-shows not charged. Smith.ai suits firms that want AI and live receptionists on inbound calls, and AI Frontdesk suits smaller shops that want self-serve AI answering.
Is an HVAC answering service the same as an appointment setter?
An HVAC answering service answers the calls customers make and schedules them, while an appointment setter also contacts the leads who never call back, such as replacement quotes and lapsed maintenance customers, until a visit is booked.
Does the FTC Cooling-Off Rule apply to an emergency HVAC repair?
The FTC Cooling-Off Rule exempts an in-home sale only when the buyer initiated contact for a bona fide immediate personal emergency and gives the seller a separate dated, signed, handwritten statement waiving the right to cancel (16 CFR Part 429). Otherwise the three-day right to cancel applies to sales of $25 or more at the home.
Can an AI voice call HVAC customers about maintenance renewals?
An AI voice can call HVAC customers about maintenance renewals only with their prior express consent, because the FCC ruled in 2024 that AI-generated voices are artificial voices under the TCPA (FCC 24-17).
How much notice does LeadsNow need to stop?
LeadsNow can be cancelled any time with 14 days notice, and pricing is a revenue share, a fee per appointment, or a mix of both, set by lead volume, what you sell and its price, your type of business, and which part of the funnel LeadsNow runs.
Pay-Per-Result appointments
See if we’re a fit
We book qualified sales appointments for you and you pay on results, not retainers. Our booking page asks a few quick questions so you find out in two minutes whether that model suits your business.
- 50,769+ appointments booked without cold calling.
- Pay-Per-Result pricing — you pay for booked, qualified calls.
- Pick your own time on our live calendar, no phone tag.
How we chose and scored these HVAC appointment setters
HVAC appointment setters were scored on four tests: how many booked visits are actually sat, how well callers are qualified, peak-season capacity, and who carries the risk in the fee.
Methodology and disclosure. LeadsNow publishes this page and ranks itself first, because it is the option we can describe from our own work and because it is paid on results rather than a per-call plan or a software subscription. Every other entry was checked on its own website on 25 October 2026 and is described only with what that site says. We did not use review-site ratings, and no provider paid to be listed. Our ranking of lead generation agencies for US HVAC companies covers the marketing firms that create HVAC leads; this page ranks the setters and receptionists that turn calls and leads into booked visits, so the providers are different.
- Sat, not booked: a replacement estimate counts once the comfort advisor is in the home with the decision makers.
- Qualification: homeownership, system age and type, the symptom (no cooling, no heat, noise, high bills), urgency, and whether financing is needed.
- Capacity: the EIA’s 2020 survey found 88% of US households use air conditioning, rising to 93% in the South, so a heatwave reaches almost every customer at once (EIA, 2022).
- Pricing model: per appointment or revenue share moves the risk to the setter; per-call and subscription plans keep it with the contractor.
Want this done for you? We book qualified sales appointments on a Pay-Per-Result basis — you only pay for calls that actually land in your calendar.
The best appointment setting agencies for HVAC companies in the US (2026)
The three US HVAC appointment setters below fix different queues: LeadsNow works outbound leads, Smith.ai mixes AI and people on inbound calls, and AI Frontdesk is self-serve software.
#1 LeadsNow: AI setters for replacement and maintenance leads
LeadsNow runs AI calling, SMS and email on an HVAC company’s outbound queue: replacement and new-install leads from web forms and bought shared leads, estimates that were given and never signed, maintenance-agreement customers who lapsed, and past customers whose systems are ageing. The setter calls and texts each new lead during calling hours, asks your questions on ownership, system age and symptom, and books qualified homeowners into the comfort advisor’s calendar, with reminders until the visit. LeadsNow has 50,769+ AI-booked sales appointments since 2017 and 1M+ leads generated. Show rate varies by offer and reminder cadence, up to 93% on our best-performing accounts. Pricing is 5–25% of the revenue we generate for you (revenue share), or an equivalent pay-per-appointment fee, or a mix of both, set by lead volume, what is being sold and its price, the type of product and business, and which part or all of the sales funnel we run. US clients are billed in USD. No-shows aren’t charged, and bad lists and the cost of contacting the many people who never book are ours.
Honest limits: LeadsNow books the visit; your technician or comfort advisor still has to sell the system. LeadsNow is an Australian agency serving US clients, not a dispatch or field service platform, and it is not built to be your 24/7 emergency switchboard: if your main leak is a ringing phone at 10 p.m. in January, Smith.ai or AI Frontdesk is the better first fix. Unsigned estimates and lapsed agreements are covered in our database reactivation guide, and the setter itself in AI appointment setting.
#2 Smith.ai: AI and live receptionists for HVAC calls
Smith.ai provides AI receptionists and live virtual receptionists; its homepage says roughly 80% of its 5,000+ customers are law firms and the rest include home services contractors such as HVAC, and its home services page says they answer, qualify and route calls 24/7 for HVAC, plumbing, electrical and contracting businesses. That page describes intake on service type, problem, urgency, location and preferred scheduling window, urgency keywords such as “no heat” and “gas leak” that trigger immediate dispatch under your escalation rules, and a hybrid model where AI handles routine scheduling while live receptionists take emergencies. Its AI receptionist pricing page lists a Free plan with 25 calls a month ($3.00 per extra call), Pro at $150 a month for 75 calls ($2.00 per call) and Enterprise at $500 a month for 300 calls ($1.67 per call). Smith.ai fits an HVAC company whose biggest loss is calls that ring out while techs are on jobs.
#3 AI Frontdesk: self-serve AI receptionist for HVAC shops
AI Frontdesk sells Frontdesk, AI receptionist software, and its HVAC appointment booking page says it answers service calls and texts 24/7, checks your live calendar before offering a time, books while the caller is on the line, and sends SMS and email reminders to cut no-shows. Its pricing page lists Business-in-a-Box at $99 a month, or $79 a month billed annually, with 200 voice minutes, 400 SMS and a hard cap of 20 outbound calls a day, and says there are no contracts. It is self-serve software, not a managed service. AI Frontdesk fits a smaller HVAC shop that wants every call answered and booked without adding staff.
The Two-Queue Rule: which HVAC leads need a receptionist and which need a setter
The Two-Queue Rule says an HVAC company runs two separate booking queues, inbound service calls and outbound replacement or maintenance leads, and each needs a different provider type.
Queue one rings you: a customer with no cooling wants a technician today, so the test is whether someone answers and books before they ring the next company. Queue two never rings: the new-system web lead, the estimate from March, the maintenance customer who did not renew. Those only become visits if someone calls and texts them. Plan prices below are published; inputs marked assumed are ours, so replace them with your own.
| Queue | Example HVAC work | Who starts contact | Worked cost in plan fees | Provider type that fixes it |
|---|---|---|---|---|
| Inbound service calls | No cooling, no heat, noisy unit, tune-up request | The customer | Smith.ai Pro: $150 ÷ 75 calls = $2.00 a call; at an assumed 60% booked, 45 bookings, $3.33 each | AI or live receptionist (Smith.ai, AI Frontdesk) |
| Inbound, self-serve software | Same calls, smaller shop | The customer | AI Frontdesk: $99 for 200 minutes; at an assumed 4 minutes a call, 50 calls; at 60% booked, 30 bookings, $3.30 each | AI receptionist software |
| Outbound leads | Replacement quotes, unsigned estimates, lapsed maintenance agreements | You or your setter | Not a per-call figure: AI Frontdesk’s entry plan caps outbound at 20 calls a day, about 600 in a 30-day month | Outbound appointment setter (LeadsNow) |
The decision rule: if most lost revenue is unanswered inbound calls, fix queue one first with a receptionist, because it is cheap per call. If the phones are covered but replacement estimates and renewals go cold, the money is in queue two, and that is the job of an outbound setter paid per appointment or on revenue share. For what an HVAC lead costs before it is booked, see how much an HVAC lead costs in the US, and for booked-visit benchmarks, see cost per booked appointment for US home services.
If we can’t make you money, we don’t deserve yours.
Pay-Per-Result pricing — performance-based alignment.
US rules an HVAC appointment setter must follow
US HVAC appointment setters must follow the TCPA, and the FCC ruled in February 2024 that AI-generated voices are artificial voices, so AI-voice calls need prior express consent.
The ruling is FCC 24-17. The FCC rule at 47 CFR 64.1200 bars telephone solicitations to residential subscribers before 8 a.m. or after 9 p.m. at the called party’s location and requires screening the National Do Not Call Registry before soliciting people you have no relationship with. When a replacement is sold in the home, the FTC’s Cooling-Off Rule (16 CFR Part 429) gives buyers until midnight of the third business day to cancel many sales of $25 or more made at their residence. The rule exempts a sale where the buyer initiated contact and needs the work for a bona fide immediate personal emergency, but only if the buyer gives the seller a separate dated, signed, handwritten statement describing the emergency and waiving the right to cancel. This is general information, not legal advice.
What an HVAC company should ask an appointment setter before signing
A US HVAC company should ask any appointment setter or receptionist six questions before signing, because the answers show which queue it actually fixes.
- Do you answer inbound calls, chase outbound leads, or both?
- What happens to a “no heat” call at 10 p.m., and how does it reach the on-call tech?
- How many calls or minutes does the plan include, and what does each extra call cost in July?
- Do you work unsigned estimates and lapsed maintenance agreements, not just new leads?
- How do you capture consent for AI-voice calls and screen the Do Not Call Registry?
- Do you charge for no-shows, and is the fee per call, per appointment, a revenue share or a subscription?
Before any setter calls back, our guide to qualifying home service leads before calling back sets the questions, and the LeadsNow trades hub covers the rest of the cluster.