[ Contact ]
[ Isotherm Industries ] Sys: Isotherm OS Status: Nominal 51.5074°N 0.1278°W LDN
[ Technology-enabled building services ]

The AI-run
building
services
group.

Isotherm Industries brings together specialist cooling, heating, maintenance and electrical companies across London and the South East, and runs every one of them on a single AI back end.

Engineers on the front line. Software everywhere else.

See Isotherm OS → Sell your business
[ The group ]

Every system in the building. One group behind it.

Isotherm Industries owns and runs specialist building-services companies. Each one keeps the local name its customers already trust, and its engineers keep doing the work they are good at.

Behind them runs one operating system. It answers the phones, sends the engineers, holds the certificates and closes the books. Clients get one call for every system and one record for every asset.

4Companies in the group
46Certified engineers
1,180Buildings under contract
24/7Response, every company
Phase 01

BUY

Owner-led specialists with trusted local names, qualified engineers and contracted customers.

Phase 02

CONNECT

Onto Isotherm OS within 90 days: phones, jobs, ledger, certificates and payroll.

Phase 03

AUTOMATE

AI takes the admin: booking, dispatch, renewals, invoicing, purchasing and the month-end close.

Phase 04

COMPOUND

Engineers learn each other's trades, customers get every trade from one call, and each company added improves the data and buying power for the rest.

Why Isotherm. An isotherm is a line of equal temperature. The mark is a reticle locked on that line: the temperature a building is meant to hold. The diamond is the target, and every company, engineer and system in the group is aimed at holding it.

[ Our companies ]

Four trades. Homes to headquarters.

Every business we buy keeps its local name and joins the Isotherm company that matches its trade. Customers see their local firm first, then the company, then the group.

CO-01 · Cooling

ISOCOOL

For homes · apartments · offices · schools · shops · commercial kitchens · server rooms

Air conditioning, air-to-air heat pumps and refrigerant compliance, from a bedroom in a flat to a building's full VRF plant.

Works toF-gas Regulations · TM44 · REFCOM
  • Home air conditioning for houses and apartments
  • Split, ducted and VRF air conditioning
  • Comms-room and server cooling
  • Air-to-air heat pumps
  • F-gas leak checks and refrigerant logs
  • TM44 air-conditioning inspections
CO-02 · Heating

ISOHEAT

For landlords · homeowners · housing providers · schools · offices

Boilers, plant rooms, heat pumps and controls, from rented flats to commercial buildings, with every landlord certificate on time.

Works toGas Safe Register · MCS
  • Domestic and commercial boilers
  • Plant rooms and pressurisation units
  • Air-source heat pumps
  • Underfloor heating and controls
  • Landlord gas safety records
CO-03 · Maintenance & M&E

ISOCARE

For estates · schools · surgeries · offices · retail

Planned maintenance and M&E contracts that keep every system in a building running, and every visit on record.

Works toSFG20 · ACOP L8 · BS 5266
  • Planned preventive maintenance to SFG20
  • 24/7 reactive call-outs
  • Ventilation and air-handling units
  • Water hygiene and legionella control
  • Emergency lighting checks
CO-04 · Electrical

ISOSPARK

For landlords · homeowners · fleets · commercial sites

Electrical installation and testing, and the switch to electric: chargepoints, solar and battery storage.

Works toBS 7671 · NICEIC · MCS
  • EICRs and remedial work
  • Rewires and consumer units
  • Distribution boards and sub-mains
  • EV chargepoints, home and workplace
  • Solar PV and battery storage
CO-05 · Next trade ISO___

The group grows by trade. Each new trade joins as an Isotherm company on the same back end and the same standard.

[ Businesses in the group ]4 businesses · London & the South East
BusinessCompanyRegionEst.On Isotherm OS
Kestrel Air ConditioningISOCOOLSurrey1998● Connected
Harbour Heating & GasISOHEATKent1986● Connected
Northgate M&E ServicesISOCARELondon2004◐ Day 40 of 90
Ashdown ElectricalISOSPARKSussex2009◐ Day 12 of 90
Your business?Any tradeLondon & SE–Talk to us →
[ Isotherm OS ]

Isotherm OS. The line that runs through every company.

What a ten-person firm can't build alone, Isotherm builds once and runs for all of them: one customer record, one asset register and one ledger, with AI running the admin on top.

92%Calls answered by AI
3,412Jobs dispatched automatically
0Certificates lapsed
Day 3Month-end close
[ Follow one job ] A no-heat call at 2am
  1. Step 01 · 02:14

    The call

    A tenant rings at 2am with no heating. The AI receptionist answers in the local company's name, recognises an emergency and texts the landlord.

    OS-01 AI receptionist
    OS-01 // AI receptionist● Live call
    02:14:07 · InboundAnswered on the second ring

    “No heating, and the boiler's showing F28.”

    Tenant · Harbour Court, Flat 12

    Answered asThe local company
    TriageNo heat · tenant over 75
    PriorityP1 · Emergency
    LandlordTexted at 02:14:41
  2. Step 02 · 02:15

    The engineer

    Dispatch sends the nearest Gas Safe engineer on call, whichever Isotherm company employs them. The compliance engine finds the boiler on the register and books its annual service, due in 41 days.

    OS-02 AI dispatchOS-03 Compliance engine
    OS-02 // Live dispatch● Live
    M25 HERTS ESSEX KENT SUSSEX SURREY BERKS CENTRAL DISPATCH FLAT 1211 MIN
    IsoCoolIsoHeatIsoCareIsoSpark Routes re-optimised every 5 min
  3. Step 03 · 03:03

    The record

    Fixed by 03:02. The part is checked against contract price, the landlord is invoiced against their purchase order, and the job lands in their client view with photos and sign-off.

    OS-05 ProcurementOS-04 AI financeOS-08 Client view

    49 mincall to invoice0admin steps by hand

    OS-08 // Client viewHarbour Court Estates · 14 sites
    Certificates in date98.6%412 of 418
    Open jobs236 engineers on site
    Awaiting approval4£6,840 in quotes
    Due in 30 days37All 37 booked
    Site and jobCompanyStatusEvidence
    Harbour Court, Flat 12Boiler fault F28 · tonight's callISOHEAT✓ Fixed 03:024 photos, invoice
    Harbour Court, 38 flatsEICR remedials, 6 C2 itemsISOSPARK◐ Awaiting approvalQuote, report
    Kings Road officeServer-room cooling faultISOCOOL● En route, 14 min–
    Crayford, Unit 4F-gas leak checkISOCOOL○ Booked 12 Nov–
    Elm Street SurgeryQuarterly PPM visitISOCARE✓ Signed off11 photos, sign-off
    Foresight

    Communal boiler, Harbour Court

    0Typical life 15 yrs25 yrs
    Age
    19 years
    Repairs, last 12 months
    £4,180
    Replace with heat pump
    −11.8 t CO₂e a year

    Plan the replacement for summer 2027, outside the heating season.

[ Eight modules, one back end ] One morning's activity
OS-01

AI receptionist

Answers every call, day and night, in the local company's own name. Books the job and escalates emergencies.

No-heat call booked. Priority 1.

OS-02

AI dispatch

Sends the nearest qualified engineer, whichever company employs them, and fills cancellations from the renewals list.

Cancelled slot filled from the F-gas leak-check list.

OS-03

Compliance engine

Every asset and legal due date on one register. Gas, F-gas, TM44 and EICR visits booked before they lapse.

TM44 inspections booked for an office client.

OS-04

AI finance

Invoicing, matching and credit control across every company. The month-end close and board pack draft themselves.

Overnight invoices matched. 3 exceptions to review.

OS-05

Procurement

Reads every supplier invoice for price drift and off-contract spend. Refrigerant tracked from purchase to log.

Copper pipe invoiced above contract price.

OS-06

Acquisition engine

Scores tens of thousands of trade businesses from public filings and finds the owners ready to talk.

New owner-led business scored. Brief drafted.

OS-07

People

Payroll, holidays, training records and every engineer's qualifications, with tickets flagged before they lapse.

ACS gas assessment due in 60 days. Reassessment booked.

OS-08

Client view

Each client sees their jobs, photos, sign-off, certificates and what is due next, across every Isotherm company.

Flat 12 repair, photos and invoice added.

[ The Isotherm Standard ]

Climate infrastructure. Held to one standard.

Behind every local name: certified engineers, logged compliance and one response line. Four commitments, the same in every company, on a single call-out or a hundred-site estate.

ANSWER

Every call answered, day and night, in the company's own name. Emergencies escalated in minutes.

Measured by calls answered

ATTEND

The nearest qualified engineer, whichever Isotherm company employs them, with the arrival time on the job record.

Measured by time to site

CERTIFY

Every statutory date held on one register and booked before it lapses. Certificates issued on site.

Measured by certificates in date

REPORT

Photos, job sheets, sign-off and certificates filed against each asset, in one view for the client.

Measured by jobs with full evidence
[ Compliance calendar ]

The dates we hold.

Building services runs on legal deadlines. Isotherm OS keeps every due date for every asset we look after and books the visit before it passes. Each mark below is one visit over five years.

Emergency lighting function testIsoCare · BS 5266 · Monthly
60visits
F-gas leak check, 500 t CO₂e and overIsoCool · F-gas Regulations · Every 3 months
20visits
F-gas leak check, 50 to 500 t CO₂eIsoCool · F-gas Regulations · Every 6 months
10visits
F-gas leak check, 5 to 50 t CO₂eIsoCool · F-gas Regulations · Every 12 months
5visits
Landlord gas safety recordIsoHeat · Gas Safety Regulations 1998 · Every 12 months
5visits
Emergency lighting full-duration testIsoSpark · BS 5266 · Every 12 months
5visits
EICR, privately rented homesIsoSpark · Electrical Safety Standards Regs 2020 · Every 5 years
1visit
TM44 air-conditioning inspection, over 12 kWIsoCool · EPB Regulations · Every 5 years
1visit

Intervals for England, as set by the regulations and standards named. F-gas check intervals double where automatic leak detection is fitted.

[ Join the group ]

Keep your name. Lose the paperwork.

You built something your customers trust. We keep it that way, and give your team a future beyond you.

The phones, the invoicing, the scheduling and the compliance chasing move to Isotherm OS. Stay on and run the business, or step back and hand over to a manager we hire with you.

TRADES
Heating, cooling, electrical, maintenance and M&E
REGION
London and the South East
WORK
Service contracts, compliance visits and customers who come back
TEAM
Qualified engineers who want to stay
OWNER
Thinking about retirement, succession or growth
YOU KEEPWE TAKE ON
Your namePhones and booking
Your engineersScheduling and dispatch
Your customersInvoicing and credit control
Your vans on the roadBuying, fleet and insurance
A stake in the groupPayroll, HR and compliance
[ Four promises to every owner ]
Name

Your name stays

On the vans, the website and the phone line.

Team

Your team stays

No planned redundancies, and pay reviewed within 90 days.

Cash

Cash at completion

Certainty for your retirement, fairly priced.

Equity

A second payday

Roll equity into the group and share in what it becomes.

[ See your name in the group ]
Your trade

Your name and livery stay. The Isotherm line sits beneath your name and is never larger than it.

Where it appearsVan doors · website footer · invoices · email signatures · tender packs · uniform sleeve
Your company name
ISOCOOL An Isotherm Industries company
[ How a sale works ]
  1. 01

    First call

    A confidential conversation about the business and what you want next. No accounts needed.

  2. 02

    Visit

    We meet you and the team and go through the numbers together.

  3. 03

    Heads of terms

    Price, structure and your role after the sale, set out in writing.

  4. 04

    Completion

    Accounts, contracts and certificates checked, with lawyers on both sides.

  5. 05

    First 90 days

    Phones, jobs, ledger and certificates move onto Isotherm OS. Customers notice faster answers.

[ Careers ]

Engineers fix things. Software does the rest.

No paper job sheets and no chasing payments. Engineers spend the day on the work they trained for, and training is shared across every company in the group.

Field engineers

Heating, cooling and electrical engineers across London and the South East. Gas Safe engineers can cross-train into heat pumps and air conditioning on us, and every qualified engineer can earn equity.

Gas Safe · F-gas · BS 7671

Service managers

Run the work for a company or a region. The system does the scheduling and the paperwork, so you can look after customers and the team.

Operations

Software engineers

Build Isotherm OS: the phone line, the scheduler, the ledger and the models that run on top of them.

Telephony · Data · AI
[ Isotherm Academy ]

Two trades. One career. A share of the company.

Apprenticeships, F-gas and heat-pump cross-training, and certificate renewals, all paid for by the group. Every qualified engineer can earn equity in Isotherm Industries.

  1. Step 01Gas SafeHeating engineer, or an apprentice working towards it.
  2. Step 02F-gasTrained on us, so the same engineer can work on cooling.
  3. Step 03Heat pumpsBoth trades in one: MCS installs that heat and cool.
  4. Step 04EquityA share of the group for every qualified engineer.
[ Questions ]

Asked often.

What is Isotherm Industries?
A group of building-services companies in London and the South East. IsoCool, IsoHeat, IsoCare and IsoSpark do the work. Isotherm Industries owns them and runs the shared systems behind them.
Does the AI replace engineers?
No. Every job is done by a qualified engineer. The software takes the calls, the scheduling, the paperwork and the chasing, so engineers spend more of the day on the job.
I own a trade business. Will it keep its name?
Yes. Your name stays on the van and the invoice, with the Isotherm company and the group beneath it. Your team and your customers stay with you.
Can clients see their own records?
Yes. Each client gets one view of their estate: jobs, photos, sign-off, certificates and what is due next. The client view goes live company by company as each one joins Isotherm OS.
Where do you work?
London and the South East, from homes and rented flats to offices, schools, surgeries, shops and commercial kitchens.
What happens to my team after a sale?
They stay. There are no planned redundancies, and pay is reviewed within 90 days of completion.
Can engineers own part of the group?
Yes. Every qualified engineer can earn equity in Isotherm Industries.
Is a first conversation confidential?
Always. Nothing is shared with your team, customers or suppliers unless you decide to go ahead.
[ Contact ]

Talk to Isotherm.

Four ways in. Every message reaches a person.

Clients

Need work done

Heating, cooling, electrical or planned maintenance for a home, a building or a whole estate.

Write toservice@isotherm.industries
Owners

Thinking of selling

A confidential first conversation about your business and what you want next.

Write toowners@isotherm.industries
Investors

Request a briefing

The investor briefing covers the plan, the platform and the pipeline. Private and confidential.

Write toinvestors@isotherm.industries
Careers

Looking for work

Engineers, service managers and software engineers.

Write tocareers@isotherm.industries