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.
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 North 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 F-Gas 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.
One number for the whole plant room
Tell us about the portfolio — we'll come back same day.