Air conditioning installers in Harlow

How air conditioning fits into a Harlow home

Nearly all the air conditioning we fit in homes is a split system: two boxes and a link between them. The indoor unit hangs high on a wall. The outdoor unit sits on brackets or a low base. Copper refrigerant pipes, a cable and a condensate drain pass between the two through one hole in the wall, and the refrigerant carries heat across. The machine is shifting heat out of the room, not manufacturing cold.

Shifting heat takes far less electricity than making it, and swapping the direction of flow turns the same equipment into a heater. Our page on air conditioning installation in Harlow follows a typical job from the first visit to the handover.

Why Harlow households are asking for cooling

Summer 2026 was the hottest the UK has recorded. The mean temperature reached 16.5°C, beating the 16.1°C record set only the year before, and there were five heatwaves. Kew Gardens, about 26 miles from Harlow, hit 38.1°C on 13 August. Lingwood in Norfolk had already reached 38°C in June.

Indoors, one room usually gives up first: a flat under the roof, a loft conversion, a bedroom with a big west-facing window. If yours stays too warm to sleep in long after sunset, read domestic air conditioning for where to begin. Source: ITV News, reporting the Met Office.

The same unit through the cold months

Run a reversible split backwards and you have an air-to-air heat pump. Slides from an Energy Saving Trust webinar credit these systems with over four units of heat per unit of electricity. With electricity at 26.32p per kWh on the current price cap, a kWh of heat comes to about 6.6p, where a plug-in heater charges you the full 26.32p.

It warms the air in a room and leaves hot water to your boiler or cylinder, so most households keep what they have and use the unit where radiators fall short. Read about air-to-air heat pumps, then whether air conditioning can heat a home. Sources: Energy Saving Trust; Ofgem.

Council homes, flats and who has to agree

Plenty of Harlow homes need someone else's agreement before a bracket goes on a wall. The 2021 Census found 29.3% of households in the town renting socially and 15.4% renting privately. Harlow Council tells both its tenants and its leaseholders that work must not begin until they have the council's written permission, and that application costs are not refundable.

Private leases usually carry an alterations clause too. A block gets just one outdoor unit under the planning rules, at 0.6 cubic metres or less. Our guide to air conditioning in a flat explains the order to do things in. Sources: ONS; Harlow Council on tenants; Harlow Council on leaseholders.

Conservation areas and streets with extra rules

Harlow was laid out from 1947 on Frederick Gibberd's masterplan, but parts of it are much older and the town has ten conservation areas: Churchgate Street, Harlow Garden Village Estate, Harlow Mill and Old Road North, Harlowbury, Mark Hall North, Netteswellbury, Old Harlow, Puffers Green, Town Park Netteswell Cross and Tye Green. Within any of them, the home planning rules bar an outdoor unit from walls and roofs that face a road, and from anywhere closer to that road than the building.

Some streets go further. Harlow Council has Article 4 directions for Old Harlow, Morley Grove, Mark Hall North and Churchgate Street. The last two, in place since October 2023 and March 2026, require an application for "other alterations" to a house, so ask the council before an outdoor unit goes on one of those homes. The Lawn, Gibberd's 1951 tower of flats, is Grade II listed, and permitted development does not apply within the grounds of a listed building. Read our planning guide before you settle on a position. Sources: Harlow Council; Mark Hall North; Churchgate Street; The Lawn; Planning Portal.

New homes across the Garden Town

Harlow grew by 13.9% between the 2011 and 2021 censuses, from about 81,900 people to about 93,300, roughly twice the rate for England. Around 16,000 more homes are planned across the Harlow and Gilston Garden Town by 2033, and the Gilston Area alone is expected to reach 10,000 homes eventually.

Well-insulated new homes keep January out and can hold on to July. Part O of the Building Regulations now makes builders design against overheating, and it favours shading and ventilation over mechanical cooling, so plenty of buyers still end up wanting a cooler bedroom. Check the covenants and planning conditions on your plot first, since either can restrict outdoor units. Sources: ONS; East Herts Council; GOV.UK.

Businesses on Templefields, the Pinnacles and London Road

The Harlow Enterprise Zone has two sites, Templefields and London Road. London Road holds the Kao Data campus, a £200m data centre development planned for 35MW, and the Pinnacles has become a run of small industrial units. Most local firms need something far smaller: a cooler office above a workshop, a showroom, a surgery or a hot comms cupboard.

The law sets no maximum workplace temperature, but it does require a reasonable one, and the Health and Safety Executive tells employers to treat heat as a risk to assess. We fit office air conditioning, commercial systems for shops, salons and restaurants and server room cooling. Sources: Wikipedia on Harlow; Computer Weekly; HSE.

Two questions for any installer, including us

Who will handle the refrigerant, and what is the company's F-gas certificate number? Everyone working on the refrigerant needs a personal qualification. Any business fitting or servicing systems for other people, sole traders included, needs a company certificate from an approved body, renewed every three years. Our guide to checking an F-gas certificate shows how to confirm the answers. Sources: GOV.UK on qualifications; GOV.UK on companies.