Retail cooling through Christmas: keep customers browsing

Christmas retail is a hot business. Bodies pack the shop floor, halogen spots run at full tilt, and shoppers dressed for the walk in end up sweating over the till by half three. Comfortable customers buy more, browse longer and come back. Uncomfortable ones leave.

The heat math for a small shop

A 100 square metre shop with 20 to 30 people inside, ten halogen spots, and a busy till generates roughly 6 to 8 kW of heat. That is enough to raise indoor temperature 4 to 5 degrees above outside within an hour. On a chilly December Saturday when it is 4 degrees outside, that puts your shop floor at 22 degrees and rising - which sounds fine until the shopper in a coat starts unbuttoning.

Above 24 indoor, shoppers rush purchases. Above 26, they leave. Above 28, they do not come back.

Why heating is not enough

A shop with just radiators or fan heaters has one dial - hotter or colder. In December that means either a freezing morning before people arrive or a stifling afternoon once the crowd builds. There is no middle setting because there is no cooling.

A modern commercial split system heats and cools on demand. It heats the empty morning to 20 degrees, then switches to cool mode as body heat builds. The room stays at 21 degrees for the entire shift.

The install that works for most small retail

Two ceiling cassettes for a 100 to 150 square metre shop. One at the front near the window, one at the back near the till. Shared outdoor unit on the rear wall or the flat roof.

Fitted, £5,500 to £8,000. Ten-year warranty on the compressor. Runs on R32 refrigerant. Full commissioning under F-Gas. Written system schematic for your insurance.

That price includes the electrical work. Not included: any structural work if the outdoor unit needs a purpose-made frame on a listed frontage.

Running cost through a trading week

Same 100 square metre shop, open six days a week, 9am to 6pm:

• Winter heating with two commercial fan heaters: £35 to £55 per week.
• Winter heating with a fitted split system on heat mode: £15 to £25 per week.

Same warmth, less than half the electricity. The saving pays for the install inside four to five years, even before you count the summer cooling benefit.

The awkward month is not December, it is April

December is predictable. Cold outside, heat inside from bodies and lights, easy setpoint at 21 degrees.

April is the killer. Some days warm, some days cold, and shop layout means you cannot open windows without pulling shopfront security. A fitted split system handles April without anyone thinking about it. Manual heaters do not.

What to check before ordering commercial

Three things a good commercial installer will ask about:

1. Trading hours. A shop open 12 hours a day needs different specification to one open 6 hours.
2. Access to the outdoor unit. Rear wall, flat roof, ground level. Landlord permission if you are a tenant.
3. Ceiling type. Suspended tile is quick for cassette installs. Hard plaster means wall-mounted units instead.

Book a quote for a January survey

Late December is not the time to book an install - shoppers are in the shop and installers are on holiday. It is a good time to book a survey for January.

Tick “My business” at the top of the quote form. We match commercial enquiries with installers who work regularly in retail and shopfront environments. Three fixed quotes back within 24 hours.