Email Marketing for Gas Engineers
Keep the reminder and the marketing apart, or you will lose the reminder
The one email in your business that must always arrive
A power flush is £615. A gas meter relocation, £425. An emergency gas repair, £255. A hob and oven connection, £255. An appliance service, £125.
Two hundred service customers at £125 is £25,000 a year, and almost all of it depends on one email landing in one inbox at one time of year. That annual reminder is not a marketing message. It is the mechanism by which the business rebooks itself.
Which is why the way most trades run email is actively dangerous for you.
If you send promotional messages to the same list from the same address, and people stop opening them, mail providers notice. Your address gets a worse reputation, more of your mail lands in a promotions tab or a junk folder, and the reminder that was quietly earning £25,000 a year starts arriving where nobody looks. Nothing bounces. Nothing errors. The rebooking rate simply drops and nobody knows why.
So for a gas engineer the first job of email marketing is protecting the email that already works.
How the separation actually works
Two streams, treated differently on purpose.
Transactional. The annual service reminder, the landlord certificate deadline, the appointment confirmation, the certificate itself. Sent one to one, plainly, from an address that sends nothing else. Short subject lines, no images, no offers. These are expected, they get opened at very high rates, and that behaviour is what keeps the address trusted.
Marketing. The seasonal notes, the repair-or-replace guidance, the safety pieces, anything to a customer who is not currently due. Sent from a separate address on a separate schedule, with a clean unsubscribe, and pruned hard — anyone who has not opened anything in a year comes off it.
Kept apart, the marketing stream can be experimented with freely and the reminder stream stays boring and reliable. Run together, which is the default in most software, one puts the other at risk.
The ratio
Our Seen package is £29 a month — £348 a year. That is under three appliance services.
Judge it as protected revenue rather than new revenue. A rebooking rate falling from eighty per cent to sixty-five across two hundred customers is £3,750 a year gone, and it is the kind of loss that never announces itself. Holding the rate is worth more than most acquisition either of us could do.
What we’d actually send
The service reminder, on its own. Six weeks before due, once more at two weeks, then a short note if it lapses. Plain text, from the clean address, with the date they had it done last year in it — that one detail lifts response noticeably.
The landlord certificate sequence. Same principle, harder deadline, and it goes to the agent as well as the tenant where relevant. Late is a legal problem for them, so this email is genuinely wanted.
A September note on repair or replace. The highest-value decision your customers make and the one they make badly in a hurry. Sent while it is warm, to people whose boiler is old or was repaired last winter.
A cold-snap note. Frozen condensate, pressure loss, what to check before ringing. Written in advance, sent when the forecast turns. Useful, brief, and it keeps you visible in the fortnight everybody is thinking about heating.
The lapsed-customer note, once a year. People who missed a service and never came back. One honest email, no pressure, mostly a reminder of when they last had it done.
What good looks like at twelve months
- Reminders sending from an address that sends nothing else, with open rates to prove it
- A rebooking rate you can see month by month rather than guess at
- Marketing sends pruned so the list is smaller and more responsive at the end of the year than the start
- Repair-or-replace reaching old boilers in September rather than everybody in November
- Landlord certificates renewing without anybody chasing them
The mistakes we see most
One address for everything. The mistake this whole page exists to prevent, and the damage is invisible until the rebooking rate has already fallen.
Never removing dead addresses. A list full of people who never open is what turns a good sender reputation into a poor one.
Attaching a promotion to a reminder. It seems efficient. It converts the most reliable email you own into one that looks like marketing to both the customer and their mail provider.
Sending the winter guidance in winter. They are cold and deciding that day. September is when it changes anything.
The first ninety days
Weeks 1–4. We separate the streams and get the reminder address sending cleanly on its own. Unglamorous and the most valuable week of the three months.
Weeks 5–8. The reminder sequence rebuilt with the last-service date included, and the landlord sequence set against real certificate expiry dates.
Weeks 9–12. The marketing stream started properly — repair-or-replace and the cold-snap note — with the list pruned before the first send rather than after.
At ninety days the measure is the rebooking rate on services due in that window, compared with the same months last year. It is the only number this service should be judged on.
Where this lands in Gaffer
Every completed service schedules next year’s reminder, so the transactional stream runs off the job record rather than a mailing tool that nobody keeps up to date.
Landlord certificates carry a hard expiry with prompts before the date, which is what makes the compliance sequence reliable enough to send from the protected address.
And churn risk flags the customers who did not rebook, which is the list the annual lapsed note goes to — the one group where a marketing email is genuinely worth the send.
Which prompt goes by text and which goes by email
Once the two streams are separated, there is a second decision worth getting right, because the channel changes the response rate more than the wording does.
Text is for anything with a time and a date attached. The appointment confirmation, the morning-of reminder, the “running an hour late” message. Almost everyone reads a text within minutes, which is exactly what those need, and nobody minds receiving them because they are plainly practical. Sent for anything else, they are an intrusion, and a text that annoys somebody does far more damage than an email that does.
Email is for anything with a document, a decision or an explanation in it. The certificate itself. The service due notice six weeks out, which needs to sit in an inbox until they are ready to book. The repair-or-replace piece in September. The landlord compliance brief. None of those wants an immediate response, and all of them want to be findable again later, which a text is not.
The one place both belong is the annual service. Email six weeks ahead so it can be planned, then a single text the week before if nothing has been booked. That combination consistently lifts rebooking, and it is the closest thing to a free improvement in this whole programme.
What matters is that the two are decided deliberately rather than by whichever the software defaults to.
Questions gas engineers ask
Is this really a problem at my size? More so, not less. A few hundred customers means a handful of unhappy recipients moves your sender reputation quickly.
Can I not just use one system? One system, two sending identities. That is what we set up — the separation is in how it sends, not in how much software you run.
How many marketing emails a year? Three or four. The reminders are the programme; the marketing supports it.
What if my list is old and I do not know who is still there? Then we clean it before the first send. Emailing a stale list is how the damage starts.
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