Commercial & residential HVAC
One accountable HVAC supplier — City, Westminster & Hertfordshire.
Datum keeps buildings comfortable and compliant. For property and facilities managers: heating, air conditioning, plumbing and gas-safety compliance under one number — documented, on-SLA, audit-ready.
Commercial HVAC is heating, air conditioning, plumbing and gas-safety compliance for commercial buildings, supplied and documented by one accountable company.
Built for FM teams
One number for the whole plant room.
One supplier, one standard
Heating, air conditioning, plumbing and gas-safety compliance under one number — no more chasing three trades for one plant room.
Everything evidenced
Every visit recorded with photos and reports. When the auditor asks, you forward a folder, not a shrug.
Compliance that runs itself
Certificates tracked and renewed before they expire — CP12s, F-Gas logs, service records. We chase the dates so you don't.
Response you can hold us to
Agreed SLAs, honest windows, and a real person when you call. We're built for FM teams tired of voicemail.
Your questions, answered
Which commercial areas do you cover?↓
The City of London, Westminster and Hertfordshire — commercial buildings, managed blocks and portfolios. Residential work runs across South Hertfordshire and London.
Are you certified for commercial gas and refrigerant work?↓
All gas work is carried out by Gas Safe registered engineers and refrigerant work by certified engineers — it's the law, and we'd have it no other way. Certificates and registration cards are available for your compliance records before we start.
Can you take over a portfolio mid-contract?↓
Yes. We start with a compliance audit of what you have — certificates, service history, plant condition — then a plan with dates. You'll know the state of your portfolio within the first month.
Do you work with managing agents?↓
Yes — managing agents and FM teams are exactly who we built this for: one supplier, one standard, everything evidenced, SLAs in writing.
Last updated
One number for the whole plant room
Tell us about the portfolio — we'll come back same day.