Tellum is a systems integrator
for plumbing and heating contractors.
Business systems — not heating systems.
Your jobs, certificates, engineers and cash live in different places — and someone has to stitch them together every week.
We join what you already run into one live picture.
Nothing gets replaced.
- Commusoft
- Sage
- Certificates
- Email & WhatsApp
- +156 systems →
- Jobs — margin live
- Service — profit and compliance per contract
- Cash — month-end builds itself
- Commusoft
- Sage
- Certificates
- Email & WhatsApp
- +156 systems →
- Jobs — margin live
- Service — profit and compliance per contract
- Cash — month-end builds itself
The systems your plumbing and heating business already runs on.
If it's on this list, we've connected it before. If it isn't, we probably still have — .
You're not unusual. This is what running a contractor at this stage looks like.
“Same job, three systems, three different numbers. I spend Friday afternoons working out which one is right.”
That's plumbing, not people. We fix the plumbing.
“We sent an engineer to the same address three times and nobody was in. Three days of cost, and a clock running that nobody was watching.”
No-access isn't free and the clock doesn't stop for it. We put attempts, access and the deadline on the same screen, while there's still time to act.
“Month-end takes the FD a week and one spreadsheet nobody else understands.”
Month-end shouldn't be a build project. It should already be there.
Wherever you are with your systems, there's a version of this for you.
You're picking or replacing something.
We help you choose the tools that fit how you actually work — not the ones the salesman liked. Shortlist, trial, decision. Then we set them up properly.
You already have the tools. They don't talk, or they don't do enough.
We customise, connect and extend what you run: integrations, missing reports, automations, the layer on top. Then we keep it working and growing with you.
You have the systems. People use half of them.
We teach your team to run the tools you already pay for — properly, and with the automations that make them worth the money.
Most clients start in the middle. Some start with training and never need the rest.
Tools get you level. The layer gets you ahead.
Choosing, connecting and training put the right tools in place — the same tools your competitor can buy. The Tellum Operating Layer is ours: it sits on top of what you run and bends to how you work. A new metric lands in days, a new workflow in a week or two. Nothing gets replaced.
One live picture. Three things on it.
Every install and works order, cost-to-date against budget — labour, materials and van stock — updated as costs land, with variations and extras where you can see them.
Nothing gets replaced. Your ERP stays your ERP. We add the layer on top.
Small first step. No migration. Nobody retrains.
We sign an NDA, then walk you through what we'd connect and how. A demo, not a sales call.
We pick the right technical approach and build a working prototype on your numbers — free, typically within 48 hours. Static data at this stage; the live connection comes with the build. You decide if it's worth going further.
Implementation, customisation, the connecting layer, training — the actual engagement begins. Your systems stay where they are; your team keeps working the way it works.
Before and after
Examples of what we can help you with — real engagements, anonymised, names and some details changed.
6 of 6 engagements
About to buy an ERP they'd have spent a year fighting.
Sage 50, a dozen spreadsheets and a WhatsApp group.
Commusoft for service, Sage kept for the books, one works tracker — live in six weeks.
Project controls lived in an eight-tab workbook next to the ERP.
NetSuite for finance, Excel for procurement, cost-to-complete and variations.
One portal on top of NetSuite — cost-to-complete per contract, variations captured the day they happen, finance stays in NetSuite.
Compliance, access and the client's deadlines were three separate spreadsheets.
Servicing tracked in the field system, certificates filed separately, response times reported to the client by hand.
One board: servicing due and done, certificates expiring, access attempts per property, and every statutory clock against the properties it applies to — with the evidence attached.
Nobody could see engineer recommendations turning into quotes and quotes turning into work.
Money in QuickBooks, pipeline in HubSpot, the servicing schedule in a spreadsheet.
One weekly picture: renewals, recommendation-to-job conversion, engineer utilisation, cash by branch.
Van stock never matched what was booked to jobs.
Materials issued from the store, used on site, and reconciled months later — if at all.
Stock issued, used and returned against each job, with safety, incidents and workforce reporting alongside.
Three acquisitions, three field systems, entities that didn't line up.
Consolidating P&L by branch and division took most of the month.
A consolidation layer on Intacct — common job structure, month-end across all entities in days.
Want to see the layer itself? Same numbers, three front-ends — inside NetSuite, as a modern portal, as Power Apps.
You're probably here the way most of our clients arrive — a colleague passed our name on, or you got a note from me. Either way, good to meet you. If the page doesn't answer your question, ask me directly — I read every reply myself.
Questions we get asked
The stack we see most often in plumbing & heating: Commusoft, Joblogic, SimPRO, BigChange, Gas Safe records, Sage — plus Excel, Microsoft 365 and WhatsApp. In total we work with around 160 systems across 21 categories, listed at tellum.works/vendors. If a system has an API, a database or an export, it can be connected.
Pick your first step.
From a free PDF to a working prototype on your own numbers in 48 hours. Pick one — the form below adjusts.