Choose the Right Commercial Fridge Capacity: One Formula Cuts Operating Costs

As a supplier of commercial refrigeration equipment, you have certainly met customers like these: after buying a fridge, they find it's either too large – leading to high electricity bills and wasted space – or too small, leaving ingredients unable to fit and forcing them to restock every day. Customers become unhappy, and your after‑sales communication costs rise.

In fact, helping your customers choose the right capacity is not only an opportunity to improve your service professionalism, but also a key to lowering their long-term operating costs and strengthening your own competitiveness.

This guide will help you and your customers clarify three questions:

1. What size of fridge does a restaurant actually need?
2. How can you lay a foundation for energy savings at the selection stage?
3. What have others done in real‑life cases?

1. Capacity Sizing – No Wasted Space, No Overloaded Fridge

1.1 A Simple Formula to Estimate Your Needed Capacity

Use this formula to quickly calculate the required net volume:

Required net volume (litres) = (Daily food need (kg) × Storage days) ÷ 0.7

The 0.7 is a loading density factor. Never fill a fridge to 100% – leave at least 30% for air circulation. Otherwise cooling efficiency drops, temperature fluctuates, and food spoils faster.

Example: A fast-casual restaurant needs 150kg of food daily (meat, vegetables, dairy, semi‑finished items). They want to order every 3 days.
→ 150kg × 3 days = 450kg
→ 450 ÷ 0.7 ≈ 643 litres
→ Recommend a 650‑750 litre combination (e.g., one double‑door upright fridge + one worktop fridge).

1.2 Quick Reference Table by Restaurant Type

These are experience‑based estimates. Actual needs depend on menu and prep style. A bakery will need more freezer space for butter and dough; a Japanese restaurant needs more chiller space for fresh fish.

1.3 Upright vs. Worktop vs. Cold Room – Which One to Choose?

• Upright fridge/freezer – Best for large quantities of pre‑packed food (frozen meat, seafood, prepared meals, beverages). Small footprint, large capacity, but may require bending to reach lower shelves.
• Worktop fridge – Placed in the prep area. Use the top as a cutting surface, store frequently used ingredients underneath – reduces walking. Recommended to have one chiller and one freezer.
• Cold room – For central kitchens, large canteens, or daily storage needs exceeding 2,000 litres. Higher initial investment but lower long‑term operating cost.

1.4 Two Details Often Overlooked

Door type: Solid doors offer the best insulation – ideal for freezers (minimise cold loss). Glass doors are good for displaying beverages or premium ingredients, but energy consumption is 20‑30% higher for the same volume. Unless you need display, choose solid doors.

Interior layout: Are shelves adjustable? Are there drawers or half‑height racks? If you store boxed or bucket‑shaped items, adjustable shelves are convenient. If you have many small‑portion types, drawers reduce cold loss when opening the door.

2. Energy Optimisation – Choose the Right Equipment, and Use It Right

Many restaurants think a fridge's electricity consumption depends only on its size. In fact, two fridges of the same capacity can differ by more than 30% in energy use.

2.1 The Key Is the Energy Label

In Europe, commercial refrigerators must display an ErP energy label. Class A uses about 30% less electricity than Class C. A Class A unit may cost 10‑15% more upfront, but the annual electricity savings typically pay back the difference within 1‑2 years.

2.2 Energy‑Saving Checklist When Selecting Equipment

• Is the compressor a well‑known brand (Embraco, SECOP, Danfoss)?
• Is the refrigerant R290 or R600a? They are 10‑15% more efficient than R134a and have zero ODP.
• What is the insulation thickness? At least 60mm recommended, 80mm or more is better.
• Does it have digital temperature control and auto defrost? Manual defrost is labour‑intensive and wastes energy.
• Is the door gasket replaceable? This affects long‑term maintenance cost.

2.3 Daily Usage Tips to Save Energy (Share These with Your End Users)

• Keep at least 10cm clearance behind and on the sides of the fridge for proper heat dissipation.
• Try to take out all needed ingredients at once – minimise door openings and duration.
• Clean the condenser coil monthly – dust buildup can increase power consumption by 15‑25%.
• Let hot food cool to room temperature before putting it into the fridge – never put a hot pot directly inside.
• Check the door gasket regularly. Use a piece of paper: close the door on it; if the paper pulls out easily, the seal is weak.

3. Real Customer Cases – How Others Made Their Choice

Case 1: Pizza Chain – Small Worktop + Large Upright, Prep Efficiency Up 20%

• Background: A pizza chain with 5 stores, each selling about 200 pizzas per day. They need large amounts of cheese, sauce, cut vegetables, as well as frozen dough and frozen meat.
• Problem before: Only one double‑door upright fridge, mixing everything together. Cheese and sauce were stored deep inside, making prep slow. Frequent door openings caused temperature swings, and cheese sometimes got ice crystals.
• Solution: Each store received one saladette worktop fridge (dedicated to cheese, sauce, vegetables) placed at the front prep area, plus one double‑door upright for dough and frozen meat placed in the corner.
• Results: Prep time reduced from 25 to 20 minutes per shift. Spoilage of cheese and vegetables dropped by 35%. Staff satisfaction improved significantly.

Case 2: Hotel Central Kitchen – Modular Refrigeration, After‑Sales Cost Down 60%

• Background: The central kitchen of a 4‑star hotel prepares food for 300 banquet guests daily. Their old fixed‑system fridge was 6 years old and had suffered two compressor failures.
• Problem before: Each compressor failure required a technician to work on site for 4‑6 hours – dismantling, brazing, recharging. A single repair cost over £600, and the fridge could not be fixed the same day, forcing food to be moved to other units, affecting service.
• Solution: Replaced with a CORESUN modular refrigeration system double‑door upright. When a fault occurs, the technician swaps the entire refrigeration module in 40‑60 minutes. The faulty module is taken back to the workshop for repair.
• Results: On‑site repair time dropped from 4‑6 hours to under 1 hour. Annual after‑sales cost fell from about £1,800 to below £700. The kitchen never delayed a banquet due to fridge failure again.

4. Summary – Three Steps to Choose the Right Fridge for Your Restaurant

1. Estimate capacity with the formula – daily food need × storage days ÷ 0.7.
2. Choose the type by scenario – upright, worktop or cold room? Don’t overlook door type and interior layout.
3. Calculate the energy cost – Class A energy label + modular design = long‑term savings and peace of mind.

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info@chinacoresun.com

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+86-512-62916399

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No. 38 Lijiang Road, High tech Zone, Suzhou, Jiangsu Province, China