Commercial Heating, Ventilation and Air Conditioning Contractors in Barnet
Boiler house refurbishment, heating, ventilation, air conditioning and maintenance for grammar, secondary and primary schools, and hospital and care buildings in Barnet.

Preou in Barnet
In Barnet we were main contractor and lead designer for the Tech Block upgrade at Queen Elizabeth's School, and replaced the main plant room at Hadley Wood Primary School.
Queen Elizabeth's School is on the High Street in High Barnet. Our engineers travel from Billericay, about 27 miles away, and projects are managed by a named contracts manager from first survey to handover.
The buildings we work on in Barnet are mostly grammar, secondary and primary schools, and hospital and care buildings. They are occupied buildings, so the works are planned in detail before we start on site: shutdowns agreed in advance, heavy work programmed into holidays or quiet periods, and temporary plant where heating or hot water has to stay on.
Case studies in Barnet
£650kQueen Elizabeth's School
M&E upgrades and refurbishment of the Tech Block as main contractor and lead designer, with new MVHR and four VRF systems.
Read the case study
£300kHadley Wood Primary School
Full strip-out and replacement of the main plant room, with three 120kW boilers, a new flue system, an upsized gas main and Trend BMS.
Read the case studyOur services in Barnet

Boiler House Refurbishment
Plant room strip-out and renewal around live buildings: boilers, pumps, plate heat exchangers, flues, pressurisation and BMS, programmed into school holidays and hospital shutdown windows.
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Heating and Ventilation
LTHW heating, radiators and distribution pipework, air handling units, MVHR and extract systems, from design to commissioning.
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Air Conditioning
VRV and VRF systems, split units and fan coil units, installed by F-Gas certified engineers in occupied buildings.
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Chilled Water and Cooling
Cooling towers, chillers, chilled water pipework and process cooling for MRI and CT, with pressurisation and water treatment.
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Domestic Water Services
Hot and cold water plant and distribution: water heaters, cylinders, booster sets, UV filtration, chlorination and washroom refurbishment.
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Gas Services
Gas Safe registered. Gas supplies, pipework alterations, gas safety circuits and boiler plant connections.
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Temporary Boiler Plant
Temporary heating and hot water plant that keeps a building running while its permanent plant is replaced.
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Service and Maintenance
Preou FM: tailored planned maintenance for boiler plant, air conditioning, ventilation, water hygiene, BMS and electrical systems.
Find out moreFrequently asked questions: Barnet
Do you carry out commercial heating, ventilation and air conditioning work in Barnet?
Yes. Our office in Billericay is about 27 miles from Barnet, and we work across London Borough of Barnet. Queen Elizabeth's School is on the High Street in High Barnet.
What kind of buildings do you work on in Barnet (EN5)?
Mostly grammar, secondary and primary schools, and hospital and care buildings. Local reference points for our work here include High Barnet, Hadley Wood. We do not carry out domestic work.
What have you completed in or near Barnet?
In Barnet: Queen Elizabeth's School (£650k); Hadley Wood Primary School (£300k). Each has a full case study on this site.
Can you maintain plant in Barnet after it is installed?
Yes. Preou FM provides tailored planned and reactive maintenance for boiler plant, air conditioning, ventilation, water hygiene and BMS controls, run from our service department in Billericay, around 27 miles away.
Can the work be done while the building in Barnet stays open?
Yes. Most of our projects are delivered in occupied buildings. One example is Queen Elizabeth's School: m&E upgrades and refurbishment of the Tech Block as main contractor and lead designer, with new MVHR and four VRF systems.
Other areas we cover
Planning a project in Barnet?
Send us your drawings and specification, or call the office to discuss the programme.