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Office air conditioning in Dartford

Does your Dartford office grind to a halt by three in the afternoon? We fit and replace air conditioning for workplaces of every size, from one room over a shop to a complete floor on a business park. The load is calculated from the people and the equipment, the installation is scheduled around your working day, and the landlord and planning questions are answered before a bracket goes up.

Ring 01322 952910

Price an office system

Three details and we call you back with the next step.

Load worked out from headcount and kit
Noisy work done when the office is empty
Energy inspections explained

What sort of workplaces are there around Dartford?

More kinds than there used to be. J & E Hall, established in the town in 1785, moved from general engineering into refrigerating machinery; today the borough works in business parks beside the Crossing, in logistics sheds along the A282, in the town centre around the High Street and on the employment land that Ebbsfleet Garden City is building alongside its homes. The Lower Thames Crossing, which received planning consent on 25 March 2025, will add to that. A low-rise business park office is mostly glass, and glass means solar gain. Sources: Wikipedia; Ebbsfleet Development Corporation; National Highways.

Is there a legal maximum temperature at work?

No, but there is a duty. Regulation 7 of the Workplace Regulations 1992 requires the temperature in indoor workplaces to be reasonable during working hours. GOV.UK confirms that no maximum is set in law and suggests a minimum of 16°C, or 13°C where the work is physical. On 19 June 2026 the Health and Safety Executive said heat counts as a workplace hazard and must be assessed like any other. Sources: legislation.gov.uk; GOV.UK; HSE.

What goes into sizing an office system?

The dimensions of the space and the area and orientation of its glazing.
The number of people at the busiest hour of the week, not the weekly average.
The power drawn by screens, computers, printers and lighting, almost all of which turns into heat.
Any comms cupboard, which should have its own cooling.
Who manages the building and what the lease says about the roof and the walls.

On a managed business park the landlord's approved-contractor rules and the fixed plant positions often decide the layout before the heat load gets a say.

Does an office need planning permission for a unit?

Treat it as yes until the planners say otherwise. The Planning Portal's guidance for non-domestic buildings is that an air source heat pump is likely to need an application, because the permitted development right for houses does not extend to commercial premises. In the Dartford Town Centre conservation area, which follows the High Street and contains more than 30 listed buildings, a visible position needs special care, so we start by looking at the rear or at an existing plant area. The landlord's consent is needed as well. The conservation areas are described on our air conditioning in Dartford page. Sources: Planning Portal; HeritageCheck.

What is TM44 and does it apply to you?

TM44 is the statutory energy inspection of air conditioning. It applies once the systems under one person's control in a building add up to more than 12kW of cooling output, and small wall units count towards the total. An accredited assessor inspects at least once every five years and the person in control keeps the report. Missing one carries a fixed penalty of £300, with a further £200 for failing to produce the report within seven days of being asked. Source: GOV.UK.

Questions people ask

Can you work in the evening or at the weekend?

Yes. The coring and pipework, which make the noise and the dust, can be done outside your hours. Tell us when the office is empty.

The building is leased. Who deals with the landlord?

You do, under the terms of your lease. We give you the drawings, the unit data sheets and the sound figures that the landlord's surveyor will ask for.

What should the thermostat be set to?

The law gives no figure. Agree one with the team and leave it alone. An office held at 19°C in July costs a fortune and pleases no one.

Sources we checked

Worth knowing before you ring

With these we can usually tell you on the first call whether the job is simple.

The postcode
Whether it is a house, a flat or business premises, and roughly its age
If you rent or lease, who owns the external wall
Which room, how big, and the direction its window faces
Any management company, conservation area or listing that applies

Ring 01322 952910 Get a price

Office air conditioning outside Dartford

Looking for office air conditioning in one of the towns around us? Each page below sets out that place's own housing and planning position, and our air conditioning in Dartford page gives the full picture.