How an HVAC Company Captured £12K in After-Hours Revenue Monthly
Summit Heating & Air recovered £12K/month in lost after-hours revenue, added 40+ jobs per month, and raised their Google rating from 4.2 to 4.9 stars.
The Challenge
Summit Heating & Air has been serving Leeds and surrounding West Yorkshire for 18 years, with a team of 11 technicians handling furnace repairs, AC installations, boiler maintenance, and duct cleaning. Owner Mike Donahue built the company on reliability and fast response times, and for years that reputation kept the phones ringing. But HVAC is an industry where emergencies don't respect business hours — a furnace failure in a Leeds January or an AC breakdown during a summer heat wave is a genuine crisis that homeowners need resolved immediately, not the next business day.
Summit's office hours were 7 AM to 6 PM, Monday through Saturday. Outside those hours, calls went to a voicemail that promised a callback "first thing in the morning." But homeowners with a broken furnace at 9 PM in January aren't waiting until morning — they're calling every HVAC company in the area until someone answers. Mike had always suspected he was losing after-hours business, but the true scale became clear when he installed call tracking software. Over a three-month period, Summit received an average of 52 after-hours calls per month. Of those, only 11 left voicemails, and of those 11, only 6 could be reached the next morning. The other 41 callers per month — nearly 80% of after-hours volume — were gone forever, having found a competitor who answered.
The financial impact was devastating. After-hours calls skew heavily toward emergencies — furnace failures, gas leaks, no-heat situations, and AC breakdowns — which carry higher urgency premiums and typically generate £280-£650 per service call. Mike estimated he was losing £12,000 to £16,000 per month in after-hours revenue. He considered hiring a night dispatcher, but the cost of a full-time employee to cover 6 PM to 7 AM seven days a week was prohibitive at over £40,000 per year. He also tried a generic answering service, but the operators couldn't distinguish between a "my thermostat is acting funny" call (schedulable for next day) and a "I smell gas and my furnace won't turn on" call (immediate dispatch needed), leading to either unnecessary after-hours callouts or dangerous delays.
The Solution
VoiceNest built a specialized AI receptionist for Summit Heating & Air that serves as a 24/7 intelligent dispatcher. The AI was trained on HVAC emergency triage protocols — it can distinguish between true emergencies that require immediate technician dispatch, urgent situations that need same-day or next-morning service, and routine requests that can be scheduled during normal hours. This triage capability was the key feature that a generic answering service couldn't provide.
When a homeowner calls after hours, the AI conducts a structured assessment. For heating calls, it asks: Is the home below a safe temperature? Are there elderly residents, infants, or pets? Is there a gas smell? Are there carbon monoxide detector alerts? Based on the answers, the AI categorizes the call into one of three tiers. Tier 1 emergencies (gas smell, CO alarm, no heat below 10°C with vulnerable occupants) trigger an immediate dispatch — the AI texts and calls the on-call technician with all details and keeps the homeowner on the line until the tech confirms they're en route. Tier 2 urgent calls (no heat but safe temperature, AC out during extreme heat) get booked as first-available appointments the next morning. Tier 3 routine calls (maintenance requests, minor issues, filter questions) are scheduled for the next available regular slot.
The AI also handles the complete booking and communication workflow. Callers receive a text confirmation with their technician's name, arrival window, and what to expect. For emergency dispatches, the AI sends real-time updates ("Your technician, Jason, is en route and will arrive in approximately 25 minutes"). This level of communication transformed Summit's customer experience and directly contributed to a dramatic improvement in online reviews. Homeowners who previously would have spent a stressful night with no heat are now getting a response within two minutes of calling — and they're leaving five-star reviews about it. The system also generates a daily report for Mike showing every after-hours call, its triage category, the outcome, and the revenue captured.
The Results
Summit now captures an average of £12,000 per month in after-hours revenue that was previously lost to voicemail and competitors.
Over 40 additional service calls per month from after-hours callers who would have gone to competitors.
Up from 4.2 stars. The dramatic improvement is directly attributed to faster response times and better communication during emergencies.
The revenue generated by VoiceNest is 12 times the monthly cost of the service — making it the highest-ROI investment in the business.
“In HVAC, when someone's furnace dies at 2 AM in January, they're calling every company until someone picks up. We used to be the company that didn't answer. Now we answer every time, and our Google reviews went from 4.2 to 4.9 stars because of it.”