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Voice AIAutomationHVACField ServiceOutbound

Outbound AI Voice Agent — Follow-ups, Reminders & Lead Reactivation

Most service businesses leave significant revenue on the table every month — not from a lack of customers, but from a lack of follow-through. Estimates that were never followed up. AC tune-up customers who haven't called back in 14 months. Appointments that get no-showed because nobody sent a reminder. Invoices sitting 30 days past due because nobody wants to make the awkward call. We deploy an AI voice agent that makes those calls for you — professionally, consistently, and at scale. **Appointment Reminders** The agent calls (or texts) confirmed appointments 24 hours out and again the morning of. If the client needs to reschedule, the AI handles it on the spot and updates the calendar. No-show rates drop significantly. The day runs tighter. **Maintenance Follow-ups** For HVAC, plumbing, and home service companies: the agent calls past customers when they're due for their annual maintenance. "Your AC tune-up is due this month — want to schedule before the summer rush?" It books the appointment and the technician shows up. Revenue that was invisible before is now scheduled. **Unsold Estimate Reactivation** For every estimate that was sent but never converted: the agent calls 5 days later, then 14 days later. "Hi, this is a follow-up on the quote we sent for your bathroom remodel — did you have any questions?" A percentage of those calls turn into jobs. No human effort required. **Overdue Payment Reminders** A friendly, professional call reminding a client about an overdue invoice. Not pushy. Not robotic. Just a clear, human-sounding reminder that preserves the relationship and gets the invoice paid. The agent logs every outcome and escalates to a human only when truly needed.

HVAC & Home Services Company
2025
Agent live in 1 week
ROI: First reactivated estimate covers months of cost

System Features

Outbound appointment reminders (call & SMS)
Annual maintenance follow-up campaigns
Unsold estimate reactivation calls
Overdue invoice reminder calls
Live calendar sync — reschedules on the spot
Outcome logging — every call result recorded
Smart escalation to human for complex situations
Multilingual — English, Spanish & Portuguese
TCPA-compliant calling windows & opt-out handling

Technology Stack

VAPI (outbound voice AI)ElevenLabs (natural voice synthesis)Twilio (outbound calling & SMS)n8n (campaign automation & CRM sync)Google Calendar API (scheduling)Supabase (call logs & campaign tracking)HubSpot / Jobber API (CRM integration)

Project Details

Client

HVAC & Home Services Company

Year

2025

Timeline

Agent live in 1 week

Category

AI Voice Agents

Technologies
Voice AIAutomationHVACField ServiceOutbound

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Measurable Impact

Project Results

Real outcomes that demonstrate the value delivered to our client.

Reduced 0% with reminders
No-Show Rate
0% of dormant quotes reactivated
Estimate Conversion
Recovered from lapsed customers
Maintenance Revenue
Zero — fully automated
Staff Time on Follow-ups
"The agent called 200 customers who were overdue for their annual tune-up. We booked 40 appointments in a week without a single employee making a call. That campaign paid for the whole system in one shot."
S
Steve B.
Owner, HVAC Company