On a hot afternoon the office line rings while the dispatcher is already on a call, and the next caller hears voicemail. This page covers that overflow: who is calling, which calls cannot wait, what a receptionist does with the second and third caller, and what your team still decides. The simulation below plays one overflow call at a fictional Tampa HVAC company.
Overflow is not an after-hours problem. It happens in the middle of a working day, when calls arrive faster than the people in the office can answer them, and the calls that arrive together are not equally urgent. One caller wants a tune-up next month. Another has an air conditioner blowing warm air and can wait until tomorrow. A third has no cooling in a house with an elderly parent in it.
Heat is what separates those calls. The National Weather Service office in Tampa Bay issues a Heat Advisory when the heat index is expected to reach 108 to 112 degrees Fahrenheit, and an Extreme Heat Warning at 113 or higher. The CDC names the people most at risk: "People aged 65 years or older are more prone to heat-related health problems," "Infants and young children rely on others to keep them cool and hydrated when it's hot outside," and hot days "can be especially dangerous for those with chronic medical conditions." That is why an HVAC call flow asks who is in the home, not only what the equipment is doing.
With one person on the phones, the second caller reaches a busy signal or voicemail. A no-cooling call from a house with a newborn sits in the same voicemail box as a request for a tune-up, and nobody knows which is which until someone has time to listen. By then the caller may have reached another company, and the voicemail will not say so.
Staffing for the peak is hard to size, because the peak arrives with the weather. The rules for the phone can be written in advance.
Many phone lines can forward only the calls nobody picks up. Verizon's support page, for example, says: "To forward only the calls you don't answer on your mobile phone, call *71 + the 10-digit number." Many office phone systems offer the same idea as a busy or no-answer setting. Your team keeps answering the calls it can, and the rest roll over.
Whether your line can do this, and how, is checked on the integration check before a Chleb setup. Chleb's receptionist answers 24/7, so the same line can take daytime overflow and, if you forward every call at night, all of your after-hours calls too.
The sample company in the simulation above follows these steps, which are its owner's rules. In a Chleb setup the steps are written for your business: the receptionist offers only the times your calendar allows, and urgent calls reach your team with the transcript.
Dispatch decides the order of visits when every truck is booked, and whether an urgent call bumps a routine one. The on-call technician calls the urgent callers back and decides what happens next. Technicians diagnose and quote. The receptionist gathers what those decisions need and puts it in front of the right person.
Someone also owns the rules: which symptoms and which people in the home make a call urgent, whether to hold a few same-day slots for urgent calls on heat advisory days, and what to say about fees.
One way to cover overflow is a second person on the phones. The Bureau of Labor Statistics puts the median hourly wage for receptionists at $18.27 in May 2025, and reports that benefits made up 30.0 percent of private employer compensation costs in June 2026. Combining those two series, a receptionist hour costs an employer roughly $26 once benefits are counted: $18.27 divided by 0.70. That is Chleb's estimate, not a BLS figure.
At that estimate, Chleb's $899 AI Receptionist + Chatbot plan costs about as much as 34 hours of a receptionist's time a month, before call minutes and emails, which are billed separately at carrier cost. The comparison only says what the money buys in hours. A person does things a receptionist cannot, and a receptionist answers at hours when no person is working. The cost calculator runs the comparison with your own numbers.
Decide these with your dispatcher before the season starts, while the phones are quiet.
Plan your own version in the setup simulator and try the after-hours demo. When it looks right, book a demo and bring your dispatcher's rules for hot days: which calls are urgent, who gets them and which slots to hold. Questions before you book? Call (813) 694-8671.
It answers whatever your forwarding sends it. With busy and no-answer forwarding, your team keeps the calls it can pick up and the rest roll over. Your phone provider's options are checked on the integration check.
It flags calls by the words and rules you set, such as no cooling together with an older adult, an infant or a medical condition in the home. Try both kinds of call in the simulation.
Only if you give it the wording. The sample company's receptionist says the fee is confirmed when the office books, and it never makes up a number.
It offers only openings the calendar has. If there are none inside the booking window, the simulation takes a message so the team can call back and set a time.
No. Chleb's receptionist answers in US English today.