HVAC · Plumbing · Electrical
The phone rings while you are on a roof.
You cannot answer it. You are halfway through a rooftop unit, or under a sink with both hands wet, or driving between calls with a customer in the truck. The person calling does not wait. They hang up and dial the next contractor, and by the time you see the missed call at 7pm, someone else has the job.
Pfeiffer Digital is a Wisconsin AI automation company based in Oconomowoc that builds and operates AI receptionists for HVAC and trades companies. Founded by Jon Pfeiffer, Pfeiffer Digital builds and runs these systems rather than handing over a roadmap.
Where the jobs actually leak out
After hours and weekends. A furnace quits on a Saturday night. Nobody is sitting at a desk. Voicemail is not an answer — the caller is cold, worried, and already looking at the next result. This is where most contractors lose the most revenue and never see it, because a call that never gets returned leaves no record of what it was worth.
Overflow during peak. The first hard freeze produces more simultaneous calls than any human front desk can take. Calls queue, callers leave. A voice agent picks up all of them at once, which is why peak season is usually where the system pays for itself.
The mid-job dead zone. Between 8am and 4pm your techs are working and the owner is running the business. The phone is answered when somebody happens to be free. That inconsistency is invisible day to day and expensive over a year.
Incomplete intake. Even when a call is answered, the details often are not captured — no equipment model, no gate code, no note that the tenant works days. The truck rolls twice for one job.
What the agent actually does
Answers on the first ring, 24/7. No hold music, no phone tree, no queue. Every simultaneous call is answered, including at 2am on a holiday.
Qualifies the job. What is the equipment, what is it doing, how long has it been doing it, is the property residential or commercial, is it inside your service area. The same questions your best dispatcher would ask, asked the same way every time.
Captures the details a tech needs. Address, access notes, contact for entry, make and model where the caller can read it off, and whether there is a warranty or service agreement on file.
Books it to your calendar. Directly into your dispatch or field service software, respecting your real availability — service area, job duration, and which techs can do which work.
Routes real emergencies to a human. No heat in January, a gas smell, water coming through a ceiling. Those never get scheduled by a machine; the agent escalates to your on-call tech immediately using your own definition of urgent.
Follows up on the ones it could not close. A caller who wanted a quote instead of a visit gets a text with the next step rather than disappearing.
The proof, stated plainly
There is a live AI receptionist deployment answering after-hours calls for a Wisconsin HVAC company. That is a real system in production, not a demo — built by Pfeiffer Digital and still operated by Pfeiffer Digital.
That is the only HVAC deployment claimed, and there is no inflated client count behind it. You can hear how an agent handles a call before committing to anything — the fit call usually includes one.