Refrigeration, ventilation, stove: where energy (and money) disappears in a commercial kitchen

Not every kitchen appliance contributes equally to the electricity bill – but the usual suspects are usually not the ones you suspect first. This article goes to the appliance level: which systems really consume energy, and where monitoring makes hidden losses visible.

Refrigeration: the continuous runner

Refrigeration and deep-freezing systems run around the clock, regardless of opening hours – this usually makes them the largest continuous consumer in the kitchen. Typical sources of loss:

• Leaky door seals that increase cooling demand unnoticed

• Iced-up evaporators that reduce efficiency

• Too frequent opening during peak hours without an insulated interim solution

• Incorrectly set target temperatures, often chosen too low to "play it safe"

Without monitoring, these effects remain invisible for months – a refrigerator that consumes 20% more than necessary is barely noticeable in the annual bill.

Ventilation and exhaust air: often on longer than necessary

Extractor hoods and ventilation systems are indispensable for the kitchen climate and fire protection, but in practice they often run significantly longer than operationally necessary – for example because they are switched on and off manually instead of being linked to operating times or sensors. Demand-oriented control is one of the levers with the fastest effect, because it does not require appliance replacement.

Stoves and commercial kitchen appliances: high consumption, but plannable

Stoves, ovens, and deep fryers draw a lot of energy during operation, but usually selectively and predictably during peak hours. The lever here lies less in the individual appliance than in the timing: appliances that are powered up long before they are needed "to be safe" cause unnecessary continuous consumption. Aligning lead times with actual ordering patterns saves money without restricting operations.

Appliances at a glance: consumption character and levers

A practical example: the inconspicuous cooling system

A system catering location notices nothing unusual in ongoing operations – the cooling system cools reliably, there are no complaints. Only a comparison with an identical system at another location reveals: The system consumes noticeably more energy for the same cooling result. The cause turns out to be a slightly iced-up evaporator – a defect that does not visibly impair cooling performance, but significantly increases energy consumption. Without comparative measurement, this would have remained undetected for months because from the user's perspective "everything works".

Seasonal fluctuations: the blind spot of many businesses

Cooling demand rises noticeably in summer, while heating and hot water demand dominate in winter – that much is known. What is overlooked in practice: Without ongoing measurement, it is impossible to distinguish whether higher summer consumption is normal or whether a system is additionally operating inefficiently. A year-over-year comparison based on the annual bill only shows the total amount, not the cause. Only a comparison on a weekly or daily basis makes visible whether the additional consumption is weather-related or technical.

Which appliance you should check first

If budget or time is limited, this order is worthwhile:

1. Cooling systems first, because they run continuously and thus cause the greatest continuous consumption.

2. Ventilation control next, because adjustments here are usually possible without replacing appliances.

3. Cooking and baking processes last, because here the lever lies more in timing than in technology.

Maintenance intervals: the underestimated lever

Many businesses maintain cooling and ventilation systems according to a fixed calendar interval instead of actual need. The problem: Two identical systems at different locations with different usage intensity do not necessarily need the same maintenance frequency. A heavily used cooling system in a high-throughput system catering branch should be checked more frequently than a comparable system in a quieter location – but according to a rigid calendar interval, both often receive the same treatment. Anyone who monitors consumption data continuously often recognizes a beginning loss of efficiency weeks before a planned maintenance is due – and can bring it forward selectively instead of waiting for the next appointment.

Refrigeration, ventilation, stove: What staff can influence in everyday life

Not every lever requires technical investment. Some can be implemented directly in everyday operations:

• Consciously keep refrigerator doors shut as much as possible, especially during peak hours – noticeably effective even without technical retrofitting.

• Set realistic preheating times for ovens instead of precautionary long ones, coordinated with the actual incoming orders.

• Actively switch off ventilation after the end of operations, instead of relying on automatic timers that are not always set correctly.

These measures cost nothing, but require awareness in the team – which is most likely to arise when the effect is made visible, for example through a simple dashboard that shows how consumption develops after a change in behavior.

Why the appliance level alone is not enough

Looking at individual appliances shows where potential lies in principle – but it does not show what is actually happening in your business. Two identical cooling systems at two locations can consume completely different amounts of energy, depending on maintenance status, usage behavior, and ambient conditions. This can only be found out through measurement, not through checklists alone.

How strait makes the appliance level visible

strait measures energy consumption granularly enough to detect abnormalities at the appliance and system level – not just "the location consumes more", but specifically which cooling system or which ventilation circuit stands out. This turns a general checklist into business-specific prioritization: You invest first where it is proven to pay off.

Where does your business stand? The Gastronomy Energy Cost Savings Calculator gives you an initial assessment based on business type and appliance equipment.

Find out where your business stands

Use the Gastronomy Energy Cost Savings Calculator – or book a demo.

[→ Go to Savings Calculator] · [→ Book a Demo]