A practical guide for HVAC businesses
Customer communication is governed by real rules. Learn what changes between a service update and a promotion, what your website needs, and how we help put the right practices in place.
There are three layers: federal and state law, carrier requirements, and your customer's permission. Passing one check does not replace the others.
Calls and texts · Federal law
The Telephone Consumer Protection Act regulates covered automated calls and texts, including artificial or prerecorded voice calls. Covered telemarketing requires prior express written consent. AI-generated voices are included; calling an existing customer does not remove these rules.
FCC consent rules ↗Sales calls · Federal and state rules
The FTC's Telemarketing Sales Rule covers sales-call practices, calling hours and Do Not Call requirements. Your internal opt-out list and the National Do Not Call Registry are different checks. State calling and recording rules can add requirements.
FTC telemarketing guide ↗Commercial email · Federal law
The CAN-SPAM Act requires truthful sender and subject information, identification of advertising where required, a valid postal address and an easy unsubscribe. Opt-outs must be honored within ten business days. A service email with a sales pitch can be treated differently.
FTC commercial email guide ↗Business texting · Carrier requirements
This means application-to-person messaging over a ten-digit local number. Carriers require registration of your business and messaging use case. Twilio also reviews your opt-in process and policies. Approval identifies the sender; it is not permission to text every number in your database.
Business texting registration ↗A repair update, a seasonal offer and an AI call are different conversations. Start with the channel and purpose.
Service update“Your technician is on the way.”
Marketing“Save 15% on a spring tune-up.”
A repair conversation is not permission for recurring promotions. Twilio requires informed, specific consent and written consent for promotional texts.
Registration is separate. Carrier registration identifies your business and messaging use case. It does not create customer permission.
Provider requirements: Twilio messaging requirements ↗
Service update“Here is your requested estimate.”
Marketing“Get ready for summer with a tune-up.”
Commercial email needs accurate sender and subject details, a postal address and a working unsubscribe. Under federal CAN-SPAM rules, honor opt-outs within ten business days.
Purpose matters. A promotion can change how a service email is treated. Provider rules may be stricter than the federal baseline.
Federal rules: FTC commercial email guide ↗
Service update“About the service visit you requested…”
Marketing“Interested in our new system offer?”
AI voices fall under the FCC’s artificial or prerecorded-voice rules. An existing customer relationship is not blanket permission for a sales robocall.
Check the call flow. Confirm consent, do-not-call, calling-time, identity and recording requirements. Live and AI calls are different.
Federal rules: FTC telemarketing guide ↗ · FCC AI-voice ruling ↗
A phone number in your customer list tells you how to reach someone. It does not, by itself, tell you what they agreed to receive.
Say who will send the messages and what they are for. Keep service updates distinct from optional promotional texts.
Use clear, optional, unchecked choices. Do not make service or a purchase depend on permission for marketing texts. Link the relevant privacy and messaging terms.
Keep the wording shown, the method, the time and the source of the agreement. An imported list or a staff member turning a setting on is not fresh customer consent.
Explain STOP and HELP for texts and provide email unsubscribe links. Carry the choice into future outreach, not just the message where they asked to stop.
Provider requirements: Twilio messaging requirements ↗ · Why forced marketing consent is rejected ↗
Customers and registration reviewers need to find your policies without logging in. Your actual signup form, published terms and registered messaging program should tell the same story.
We can take much of this off your plate
We provide everything you need to update your website’s privacy and messaging-terms pages, with wording tailored to your business.
We help you match the pages, policy links and signup disclosures to how you actually communicate with customers, making the updates as easy as possible. Existing policies can be reviewed alongside your own legal adviser.
These are messaging-registration requirements as well as useful customer disclosures; broader privacy obligations depend on your business. Twilio policy and opt-in requirements ↗ · Public policy URLs required for new campaigns ↗
A seasonal campaign and an arrival update serve different purposes. Separate phone numbers help keep marketing traffic from sharing the same number-level reputation as essential service conversations.
Service phone number
Appointment confirmations, arrival updates and conversations about the work a customer requested.
“Your technician is on the way for today's appointment.”
Marketing phone number
Seasonal offers, new-service promotions and campaigns sent to the appropriate opted-in audience.
“Our spring tune-up offer is available this month.”
How we put it into practice: Circuit supports distinct service and marketing senders, and uses the purpose-matched number when one is configured. We work through that setup during onboarding. Accounts still using one number need that separation configured before they receive its benefit.
Separate numbers reduce shared exposure; they do not make reputations fully independent or guarantee delivery. Consent and opt-outs still apply across the business. A different number must never be used to bypass an opt-out or filtering. How message filtering works ↗
We work through registration, policies and communication settings with you. Circuit then helps carry those choices into the conversations your team handles every day.
Some settings allow staff to acknowledge a risk or choose a wider audience. Software controls support your process; they do not create permission or replace a review of the rules that apply to your business.
Too many unwanted messages can affect whether your next useful reminder gets through. Registration, permission and delivery are related, but none is a guarantee of the others.
Mailbox-provider standards: Google email sender guidelines ↗
Bring us your forms, current messaging and the customer experience you want. We’ll work through the setup with you, then build from a useful first step.
Discuss your communication setupReviewed October 22, 2026. This guide provides a practical US starting point, not legal advice. Requirements vary by channel, purpose and location, including state calling and recording laws. The linked sources distinguish federal rules from provider requirements.
