Industries · Plumbing & heating
AI for plumbing and heating firms: nobody knows how many calls you miss
There is a number every supplier will open with — the share of your calls that go unanswered. We went looking for a defensible one and could not find it, so this page does the only honest thing available: it hands you the arithmetic and lets you put your own number in.
- Plumbing & heating
- Plumbing and heating
- Trades
- Missed calls
- Out of hours
- Business process automation
The short answer
Noxia builds enquiry handling, job-booking admin and document chasing for UK plumbing and heating firms, with a record of every message. We do not quote a missed-call statistic: published claims for unanswered UK business calls run from roughly half to 94%, every one of them from a company selling call answering, and the only one stating a method measured evening calls to letting agents. Instead we publish a calculator with no default values that takes your own six numbers and can return "buy nothing".
On this page · 6 sections
A plumbing firm gets one sales pitch more than any other, and it opens with a percentage: you are missing X% of your calls, each one is worth £Y, therefore you are losing a fortune, therefore buy this.
We went to check X. Here is what is actually out there.
A spread from roughly a half to almost everything is not a figure with error bars. It is what you get when nobody has measured and everybody has an interest. Picking a value from it — even a cautious one — turns a sales claim into an apparent fact, and we are not going to do that on a page where we are the ones selling.
Two specific claims aimed at this trade were struck for the same reason: "1 in 5 calls missed" and "40% of bookings made after hours". Neither could be found in any source. They are in the public register of what we removed, alongside seven others.
What to do instead: your number, not ours
The missed-call calculator takes six numbers you already have — monthly enquiries, the share that come by phone, the share you miss and never recover, your conversion rate, what a converted job is worth, and the one every vendor sets to 100%, how much of it a system would realistically win back. It runs in your browser, nothing is sent anywhere, and there is no email field.
It has no defaults, deliberately. And it can tell you to buy nothing — if your phone is answered, if the missed calls are low-value, or if the quote you have been given exceeds the recoverable revenue. Plumbing firms are the ones most likely to get that answer, because a two-van firm with a good office manager often is not losing the money the pitch assumes.
What we build, when the arithmetic supports it
| The job | What the system does | What stays human |
|---|---|---|
| Enquiry handling | Answers the web form, the missed call and the out-of-hours message with a real reply, captures address, job type and urgency, and gets it in front of whoever books work — with a log of every exchange. | Pricing, and any judgement about whether a job is safe to take. |
| Booking admin | Confirmations, reminders and the "we are on our way" message. Rebooking when a slot moves, without three phone calls. | The schedule itself, which is a person’s job and usually a good one. |
| Certificate and document chasing | Gas Safety Records, warranties, invoices, landlord paperwork — chased on a schedule until they arrive, then it stops. | Anything a certificate’s absence actually implies, which is a compliance question. |
| Quote follow-up | The second and third contact on a quote nobody chased, drafted for a person to send. | The price, and the decision to discount it. |
What we will not do
We will not put an AI in front of an emergency call. A person reporting a gas smell, a burst pipe or no heating in a cold house needs a human immediately, and any system we build routes those straight through and records that it did. We will not quote prices automatically. And we will not automate anything where being wrong once costs more than being slow a hundred times.
An honest word about size
Our own research database holds 28,583 UK organisations and 4 of them are plumbing and heating firms. We work mainly with regulated financial firms, and this page exists because the admin pattern is the same and because somebody should publish the missing number honestly rather than invent one.
If you want to know whether any of this is worth buying before you speak to anybody, the triage tool asks six questions and says no more often than yes, and the £200 floor is the arithmetic on why small savings do not survive the cost of adopting them. What an unanswered phone actually costs is the evidence we could stand behind.
Questions people actually ask
What percentage of calls do plumbing firms miss?
Nobody has published a figure we can defend. Claims for unanswered calls range from roughly 47% to 94.1%, every one from a company selling call answering; the only one stating a method measured evening calls to sales and letting agencies, not plumbers. Rather than pick one, we publish a calculator with no defaults so a firm can use its own number.
Is an AI receptionist worth it for a small plumbing firm?
Often not. If your phone is generally answered, if the calls you miss are low-value, or if the quote exceeds the revenue a system could realistically recover, the arithmetic says buy nothing — and our calculator will say so in those words. A two-van firm with a good office manager frequently gets that answer.
Should an AI answer emergency plumbing calls?
No. Someone reporting a gas smell, a burst pipe or no heating in a cold house needs a person immediately. Any system we build routes emergency calls straight to a human and records that it did so. Being wrong once on an emergency costs more than being slow a hundred times on a quote.
What admin can a plumbing and heating firm automate safely?
Enquiry capture and first reply, booking confirmations and reminders, rebooking, chasing Gas Safety Records, warranties and landlord paperwork, and drafting quote follow-ups for a person to send. Pricing, scheduling judgement, emergency triage and anything a missing certificate implies should stay with a person.
Sources
- Noxia figures register, FIGURES.md, rendered at /what-we-checked. “1 in 5 calls missed” in the trades: struck — published claims for unanswered UK business calls run from roughly half to 94%, all from companies selling call answering; only one stated a method, and it measured evening calls to sales and letting agencies. “40% of bookings made after hours”: struck — not found. The specific values found in that search were approximately 47%, 62% and 94.1%, the last for evening calls to sales and letting agencies (93.8% across the 3,047 property firms that study rang). noxia.co.uk ↗ — primary and first-party: our own record of the figures we refused to use, published against our own commercial interest
- Noxia research database, Lead_Magnet/data/leadmagnet.db, counted by SQL on 7 September 2026: 28,583 UK organisations, of which 4 plumbing and heating firms, 7 dental practices, 16 letting agents, and approximately 25,500 in financial services. — first-party; our own database, counted rather than estimated re-checked every 6 months
- Our own missed-call calculator opens on a worked example rather than an industry average, takes six figures from your own records — including the recovery rate every vendor sets to 100% — plus the monthly quote you are weighing, runs entirely in the browser with no network request and no email field, and can return “Buy nothing”. test/pages.js fails the build if that string is ever removed. noxia.co.uk ↗ — first-party, and checkable: the refusal is enforced by a test rather than promised in copy
- The division of jobs into what we automate and what stays with a person, and the rule that emergency calls never meet a machine, are ours. Neither is a trade standard. — our opinion, labelled
Checked 20 September 2026. Next scheduled check 19 March 2027. Numbers that move — leaderboards, live indices — are re-checked every 30 days; annual datasets and rules in force every six months; dated research once a year. If something here has gone stale before we got to it, tell us and we will correct it and say what changed.
Put your own numbers in first. We would rather lose the sale than borrow a statistic.
Run the calculator before you speak to us or to anyone else. If it says buy nothing, that is the tool working. If it says there is real money in the calls you are missing, tell us what your day looks like and we will say which single piece is worth building.
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