Why direct sunlight is the biggest problem
Glass lets in light and heat far more readily than an insulated wall. When sun falls on the glass door, it warms the products just behind it directly, and the cooler has to remove that extra heat continuously. Bottles on the front row can sit noticeably warmer than those at the back, and the compressor may run almost without a break through the afternoon.
Sun also heats the cabinet body and the area around the condenser, and over months it fades labels and can degrade plastics and gaskets.
Positions that work well
- Inside the shop, in line of sight from the entrance but out of the patch of floor the afternoon sun reaches.
- Against an inside wall rather than a sun-heated outer wall.
- Near the billing counter for impulse purchases, as long as the counter area is not hot from equipment.
- With enough space in front for the door to open fully and a customer to stand without blocking the aisle.
Track the sun before you fix the spot
Sun position changes through the day and through the year. A spot shaded at 10 a.m. may be in full sun by 4 p.m., and a shop front that is shaded in summer may catch low winter sun. Before installation, watch where sunlight falls at several times of day, or ask the shopkeeper who knows the space. West-facing shopfronts are usually the hardest.
If sun cannot be avoided, use awnings, sun films on the shopfront glass or blinds during the worst hours, so the light reaching the cooler is reduced.
Airflow, clearance and dust
Visi coolers commonly have their refrigeration system at the bottom or top, and breathe through grilles there. Stacked cartons in front of a bottom grille, or crates on top of a top-mount unit, block airflow. Leave the clearance specified in the manual behind and above the cooler.
Shops near roads collect dust fast, and dust on the condenser cuts performance. Place the cooler where it can be pulled out for cleaning and clean the condenser regularly.
Two or three coolers in a row is common in beverage-heavy shops. Leave a gap between them if they release heat from the sides, and avoid tucking a chest freezer so close to a visi cooler that one blows warm air at the other. A row of units in a small shop also warms the room itself, so keep the shop ventilated, especially after the shutter has been down overnight.
Doors, aisles and footfall
- Swing doors need space to open; sliding doors suit narrow aisles.
- Avoid positions where customers stand with the door open while browsing in a draught from the shutter or a fan.
- Keep the cooler away from the direct blast of a ceiling or pedestal fan aimed at the door opening; it pushes warm air in when the door opens.
- Group high-turnover items at eye level so customers find them quickly and close the door sooner.
Lighting and display tips
Interior LED lighting does the job of attracting attention without the heat of older lamps. A cooler placed in a slightly darker part of the shop often looks brighter and more inviting than one competing with daylight. Keep front-facing labels neat, leave space between products and the back wall for air, and do not overfill shelves; a packed shelf blocks airflow and the products at the back get colder while the front stays warm.
Power and safety
Give the cooler its own earthed socket installed by a licensed electrician, within reach of its cord. Do not run its cable across the floor where customers walk, or share a socket with a fan or lighting board. Shopfront positions often get rain splash during the monsoon; keep plugs and sockets well above the floor and away from water.
Frequently asked questions
- Can I keep a visi cooler outside the shop under the shutter?
- It is not ideal. Outside, it faces sun, rain, dust and higher temperatures, and electrical connections are exposed. If you must, protect it from direct sun and rain and have the power connection made weather-safe by a licensed electrician.
- Why are the front bottles warmer than the back ones?
- The front row sits closest to the glass, gains heat when the door opens and gains sunlight if the cooler is in sun. Move the cooler out of the sun and avoid overfilling so air can circulate.
