Cool customers: which next-generation refrigeration is right for you

A brief explanation of this is that the widest-used refrigerant in the industry is being made illegal. R404A was introduced 20 years ago as a replacement for ozone-depleting refrigerants. It may not have been perfectly energy-efficient, and it has a too-high Global Warming Potential (GWP), but it filled an urgent need at the time, and is still widely used.

But now, European regulations say that any refrigerant with a high GWP will be banned, and so many manufacturers are turning to one called R290. This has a low environmental impact and many makers say it will be better-performing and more cost-effective for users.

Hoshizaki's new Snowflake series of refrigeration, freezer and blast chiller units will all use the R290 refrigerant and be fitted with Hoshizaki's ‘Tropical Cooling System', which is intended to operate in ambient temperatures of up to 40ºC.

Electrolux has also switched all new models in its Ecostore range to R290. "Given its less-aggressive properties compared to traditional refrigerants, this can improve the overall operational life of components within a unit," says design and product manager Steve Bowler. "Refrigeration is a core function that a professional kitchen cannot operate without, and given its ‘always-on' nature, utility bills can quickly add up. Our range ensures that any contents will remain at the same temperature, even in ambient temperatures reaching 40ºC, no matter how many times the door is opened and closed."

The new refrigerant is preferable, agrees Scott Jones, sales director at True, and is most effective when it is a part of an energy-efficient interior design project.

"Units using R290 do tend to be more economical to run, and also give quicker temperature recovery and fewer breakdowns, so you will reduce your running costs over the long-term. But it's important to understand what's going on both inside and outside the units.

"Externally, a lot of refrigeration equipment requires space to the sides and rear to expel warm air or ‘breathe'. Although 50mm of ‘breathing space' might not seem much, when multiplied across several units, it can be a lot of space. So, front-breathing units will allow for better use of space.

Don't leave it too late

If the new refrigerant is both more eco-friendly and more cost-effective, why are more caterers not demanding it? There's a practical explanation, says Mike Hanson, head of sustainable business at BaxterStorey: "When a fridge breaks down, the priority is to get it replaced to maintain service, and so the decision is based on availability, not the energy efficiency of the refrigerant."

But the new refrigerant will take over soon, says Paul Purslow, sales director at Counterline: "We have made a huge investment in changing 200 products to R290. Some operators have not wanted to switch. For example, forecourt operators have said they wanted to be sure they could cover for all kinds of flammability issues. But it will all come - in a year or two, the costs of servicing the older equipment just will not be viable."

Ideally, caterers should at least take time to think about the new concept of 'climate class', stresses Liebherr. This is a rating system that relates to the ambient temperature of the environment where equipment is sited; typically, Liebherr refrigeration will operate in kitchen temperatures as high as 40ºC while maintaining correct internal temperatures.

However, Sally Bentley, director of sales and service at Husky, says that expensive mistakes are being made through insufficient understanding. Husky has seen buyers enquiring about products that are over-specified for their own kitchens - it really is worth taking the time to understand the subject to avoid paying for extra features that aren't necessary.

Energy efficiency and climate class need to be considered together, says Mike Hardman, marketing manager at Alliance Online. As fridges and freezers can account for a third of the energy consumption of a commercial kitchen, choosing the right equipment really will save money.

"Climate-class indicates the optimum ambient temperature in which equipment can operate," says Hardman. "If your kitchen is generally below 26ºC, a 'climate-class 3' fridge will be fine. If your kitchen regularly gets over 32ºC, you'll want a 'climate-class 5'. If you don't choose the right climate class for your environment, your fridge may be working harder than it needs to, and it probably won't be able to maintain an even temperature."

Drawers versus doors

Considering energy efficiency, climate-class and the ideal, ready-to-hand location of storage in a kitchen makes up the modern concept of 'smart storage', and this has led to Williams Refrigeration devising the Chef's Drawer, a unit which operates as either a fridge or a freezer, right at the 'cook face' in the heart of the kitchen.

"The correct temperature of your unit is critical for food safety, so keep an eye on it but don't set it too low, because as well as compromising food quality, this wastes energy - every degree saved could reduce your energy consumption by 2%," says Malcolm Harling, sales and marketing director at Williams Refrigeration. "And do not overfill your fridge, because a unit is at its most energy-efficient when it has room for the cool air to circulate."

Along similar lines, Precision has created individual 'variable temperature' drawers that can be switched from fridge to freezer at the push of a button. Several drawers can be stacked together; and two, including castors and worktop, comes to the right working height for a standard kitchen.

"You need access to refrigeration at the point of cooking," says Lincat's marketing manager Helen Applewhite, so the brand has introduced Blu refrigerated chef bases; these are powered by a three-pin plug, and are supplied on castors, allowing the units to be shifted wherever needed.

"You don't want staff to be constantly transporting ingredients across the chef's cooking area," observes Tina Carter, marketing manager at Brakes. "Coldrooms can be a good solution - an interior coldroom is probably more energy-efficient than a whole bank of fridges and freezers. But if there is little internal space and a high ambient kitchen temperature, an exterior coldroom may be much better."

That external coldroom does not have to be a permanent structure, says Ross Pushman, managing director of Coldtraila. He offers mobile walk-in chill or freezer trailers which can hold up to 2,000kg of storage in up to 20 cubic metres of space. "Our trailers are available for rent, which means one-day events and emergency situations can be handled more cost-effectively than static refrigeration," says Pushman.

There is an unexpected downside to walk-in freezer spaces, says Luke Carman, sales manager at Cambro. "It's easy for things to get overlooked - operators discover products that have been hiding for months and can no longer be used. With our Premium Series high-density shelving system, it's easier to access the food and easy to organise storage and rotate products, which saves time and cuts wastage." This system is claimed to increase storage capacity by up to 50%, and comprises mobile shelving units that glide along a track. The tracking does not need to be fixed to the floor, and it can be used on uneven flooring.

Case studies

eral chefs who believe in the concept of smart refrigeration report practical advantages.

"A fridge might not be the most exciting piece of kit, but is probably the most important equipment in the kitchen," says Lee Cadden, head chef at Charlotte's W5 in Ealing. "We use four Hoshizaki Gram Gastro undercounter units: one for meat and fish, one for garnish, one for the larder and pastry section and one for breakfast service. We don't have space in our kitchen for larger, upright units, but we can fit up to nine GN one-quarter containers in each full-length pull-out drawer, and that means that we can see everything inside without moving trays around."

At Mana in Manchester, head chef Simon Martin's kitchen is divided into temperature zones. "Each dish has specific storage requirements for its individual ingredients, and how we store those ingredients can have a huge effect on the dish's quality."

He uses Precision's HPU153 under-counter units, with customised drawer fittings. "Drawers are more space-efficient, less likely to get in people's way, and with our temperature-segregation scheme, they are easier to categorise," he says.

An unusual customisation was his adaptation of a variable-temperature drawer in an Eco-Chef unit, a self-contained integrated cooking suite. This is the largest customisation of such a unit yet achieved, and Martin says he has seen great value in having this refrigerated storage right beside the hot section of his kitchen.

SuppliersAlliance Onlinewww.allianceonline.co.uk](http://www.allianceonline.co.uk) 0844 499 4300 Brakes [www.brakesce.co.uk](http://www.brakesce.co.uk) 0844 725 9494 Cambro [www.cambro.com](http://www.cambro.com) 07985 304027 Counterline [www.counterline.co.uk](http://www.counterline.co.uk) 0151 548 2211 Electrolux [www.professional.electrolux.co.uk](http://www.professional.electrolux.co.uk) 08443 753 444 Hoshizaki [www.hoshizaki-europe.com](http://www.hoshizaki-europe.com) 01322 616900 Hubbard [www.scotsman-ice.co.uk](http://www.scotsman-ice.co.uk) 01473 350045 Husky [www.husky.co.uk](http://www.husky.co.uk) 01455 555340 Liebherr [home.liebherr.com](http://home.liebherr.com) 03330 147888 Lincat [www.lincat.co.uk](http://www.lincat.co.uk) 01522 875500 Precision [www.precision-refrigeration.co.uk](http://www.precision-refrigeration.co.uk) 01842 753994 True [www.truemfg.co.uk](http://www.truemfg.co.uk) 01709 888080 Williams [www.williams-refrigeration.co.uk](http://www.williams-refrigeration.co.uk) 01553 81700

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