By Peter Torreele, Founder of The HVAC Edge · Updated November 2026 · How we review · Affiliate disclosure: some links are sponsored; we may earn a commission at no cost to you, and it never changes our rankings.
A no-heat call at 10 p.m. in January is the most valuable call an HVAC shop gets all week, and it is the one most likely to reach voicemail. The homeowner hangs up and calls the next contractor on Google. An HVAC answering service exists to catch that call: answer it, recognize it as an emergency, get it to your on-call tech, and book the routine calls for the morning.
In 2026 there are three kinds of service to choose from: AI answering, live (human) answering, and hybrid services that mix the two. Below is what each one costs, what it should do for an HVAC company, and which options fit which shop. Every price comes from the vendor's own pricing page.
Quick comparison
| Service | Type | Starts at | What the price includes | Try before paying |
|---|---|---|---|---|
| Rosie | AI | $49/mo | 250 minutes; calendar booking from the $149 plan | 7-day free trial |
| Goodcall | AI | $79/mo | 100 unique callers, minutes never metered | Free demo agent |
| Dialzara | AI | $29/mo | 60 minutes, then $0.48/min | 7-day free trial |
| Smith.ai | Hybrid AI + human | $2.50 per call | Billed per call; live agents on the calls you choose | AI-only plan free for 25 calls/mo |
| Ruby | Live receptionists | $250/mo | 50 minutes of live answering, 24/7 | Not listed |
Prices checked on each vendor's site in October and November 2026. Plans change often, so confirm before you buy.
What an HVAC answering service should do
A generic answering service takes a message. An HVAC one has to do more, because your calls are not all equal. Before you sign up for anything, check that it can:
- Answer every call, 24/7, including holidays. Cold snaps and heat waves don't respect business hours.
- Tell an emergency from a routine call. No heat with an elderly occupant, no cooling in extreme heat, a gas smell, water pouring from an air handler: those need a person now. A tune-up request can wait until 8 a.m.
- Reach your on-call tech. By transfer, text or both, with a fallback number if the first one doesn't answer.
- Capture what the tech needs. Name, callback number, service address, equipment type and age if known, and the symptom in the caller's words.
- Book routine work. Ideally straight into your calendar or field-service software (Housecall Pro, Jobber, ServiceTitan) rather than into an inbox someone has to retype.
- Send you a summary. A text or email after each call so nothing depends on listening to recordings.
The difference between options is mostly in points 2, 3 and 5: how the service decides what is urgent, how it reaches you, and whether it can put the job on the schedule itself.
AI, live or hybrid: which do you need?
- AI answering. Answers instantly, never puts a caller on hold, and costs the least. Emergency routing follows rules you set (or, with some tools, the AI's own judgment of urgency). Best for shops whose calls are mostly service requests and bookings.
- Live answering. A trained person on every call. The most reassuring for a panicked homeowner, but billed by the minute and far more expensive at HVAC call volumes.
- Hybrid. AI handles routine calls, and a live agent takes the ones you choose, for example new customers or anything that sounds like a replacement. Best when a single call can be worth thousands.
For most small and mid-size HVAC companies, AI is the sensible default, with hybrid worth a look if replacements make up a large share of your revenue.
The options in detail
Rosie: trade-focused AI at the lowest monthly price
Rosie is built for home-service businesses, so its default scripts already sound like an HVAC office, and it markets automatic detection of urgent or upset callers. Plans: Professional $49 (250 minutes), Scale $149 (1,000 minutes) and Growth $299 (2,000 minutes). Know one thing before you pick a plan: the $49 plan answers and captures calls but texts the caller a booking link instead of booking the job. Calendar booking, live transfers and texts during calls start on Scale. There is a 7-day free trial. Rosie review → · See Rosie →
Goodcall: AI with unmetered minutes
Goodcall never meters minutes, so long calls cost nothing extra. Each plan includes a number of unique callers per month: Starter $79 (100), Growth $129 (500), Scale $299 (2,000), with extra callers at 79¢, 26¢ or 15¢. A customer who calls back three times in a cold snap still counts once that month. You can build and hear a free demo agent before paying. Goodcall review → · Goodcall vs Smith.ai →
Dialzara: the cheapest way to stop missing calls
Dialzara's Business Lite plan is $29/month for 60 minutes, then $0.48 a minute; Pro is $99 for 220 minutes, Plus $199 for 500 and Elite $349 for 1,000. It covers the core job, answering and capturing call details 24/7, with a 7-day free trial. Watch the minute caps: a busy week can push you past the Lite allowance quickly. Dialzara review →
Smith.ai: AI plus live agents for high-value calls
Smith.ai's hybrid service bills per call, from $2.50 to $3.70 depending on which calls go to live agents; its own estimate puts the cheapest routing at about $218/month for 75 calls. It also sells fully live plans ($300 for 30 calls up to $2,100 for 300) and an AI-only receptionist with a free plan for 25 calls a month. Worth the premium if a human on the phone is what closes your replacement jobs. Smith.ai review → · Rosie vs Smith.ai →
Ruby: fully live receptionists
Ruby puts a live receptionist on every call, 24/7 including weekends and holidays, and says it charges no setup or after-hours fees. Plans run from $250/month for 50 minutes to $1,725 for 500 minutes. It is the most personal option and, at HVAC call volumes, by far the most expensive.
After-hours answering for HVAC: set up emergency routing first
Most of the value of an answering service is in the calls that come in after 5 p.m. Before you go live, write down your rules:
- What counts as an emergency, by season. No heat is urgent in January; no cooling is urgent in a July heat wave; a gas smell or carbon monoxide alarm always means "tell them to leave the house and call the gas utility or 911", then notify you.
- Who gets the call, in which order, and what happens if nobody answers within a few minutes.
- What the caller is told about after-hours rates or arrival windows, so your tech isn't negotiating at the door.
- What waits until morning: maintenance, quotes, billing questions.
Start by forwarding only your after-hours and overflow calls. Check the call log every morning for the first week, tighten the rules, then decide whether to route daytime calls too.
Answering service for AC companies
If your business is mostly cooling, the same setup applies with the calendar flipped: your peak is the first heat wave, and "no AC" calls from elderly occupants or homes with infants deserve emergency handling. Make sure your plan's minutes or caller allowance covers your busiest summer month, not an average one.
What it costs for a typical shop
Billing models differ (minutes, unique callers, or calls), so compare them on your own numbers. As an illustration, take a shop with about 300 calls a month from 200 different callers, averaging three minutes a call (900 minutes):
| Service | Plan that fits | Approximate monthly cost |
|---|---|---|
| Goodcall | Growth (500 unique callers) | $129 |
| Rosie | Scale (1,000 minutes, includes booking) | $149 |
| Dialzara | Elite (1,000 minutes) | $349 |
| Smith.ai hybrid | Per call, cheapest routing | about $771 (Smith.ai's own estimate for 300 calls) |
| Ruby | Above the 500-minute plan | over $1,725 (custom) |
Your numbers will differ, but the pattern usually holds: AI services cost tens to low hundreds of dollars a month, live answering costs hundreds to thousands. Either way, one recovered no-heat call or replacement lead typically covers the month.
How to choose
- Solo operator, mostly after-hours calls: Rosie's $49 plan or Dialzara Lite, and upgrade once you see the volume.
- Small to mid-size shop that wants jobs booked automatically: Goodcall Growth or Rosie Scale.
- Replacement-heavy or commercial shop: Smith.ai's hybrid, so a person handles the calls worth thousands.
- You want a human on every call, whatever the cost: Ruby or another live service.
For a deeper look at the AI options, see our best AI receptionist for HVAC guide and Goodcall vs Rosie.
How we evaluated
We compared these services against the calls an HVAC shop actually gets (an after-hours no-heat emergency, a routine maintenance booking, a price shopper), using each vendor's published features, documentation and pricing. We have not run paid accounts on these services; if you use one and something here doesn't match your experience, tell us. No vendor paid for placement. See our methodology.