The number of water dispensers an office needs depends on more than the number of employees. Office size, daily attendance, floor layout, water consumption, dispenser capacity and peak-time demand all affect the right setup.
For a small office with 10–20 people, one well-positioned water dispenser may be enough. As the workforce grows, or where employees are spread across several floors or departments, adding more water points can make access easier and reduce queues.
There is no single UK rule that says an office must have one water cooler for a specific number of employees. Instead, UK workplace guidance requires employers to provide an adequate supply of wholesome drinking water that is readily accessible at suitable places.
For practical planning, a useful starting point is one water cooler for around 20–25 regular users, then adjust this based on how the office operates. Some commercial water dispenser providers use a similar 20–25-person starting point, while other workplace suppliers suggest around one cooler per 20 employees.
The important point is that this is a planning guide, not a legal requirement.
Quick Answer: How Many Water Dispensers Does an Office Need?
A practical starting point is:
- Up to 20 employees: 1 dispenser
- 21–40 employees: 1–2 dispensers
- 41–60 employees: 2–3 dispensers
- 61–100 employees: 3–5 dispensers
- 100+ employees: Assess each floor, department and high-use area separately
These figures assume a normal office environment with regular access to drinking water. A large office may need more dispensers if staff are spread across different floors or if several people need water at the same time.
For a more accurate decision, consider people per water point, distance to the dispenser, daily attendance and peak usage rather than relying on headcount alone.
Why Office Size Is Only Part of the Calculation
Two offices with 50 employees may have completely different water dispenser requirements.
Imagine one office where all 50 employees work on a single floor and the kitchen is centrally located. One high-capacity dispenser may provide reasonable access.
Now consider another 50-person workplace spread across three floors. A single dispenser on the ground floor would mean that many employees have to leave their work area to get water. In this case, several smaller or higher-capacity water points may be more practical.
Office layout matters because accessibility matters.
UK Health and Safety Executive guidance states that drinking water should be readily accessible and available at suitable places.
This means your facilities plan should consider:
- Number of employees actually working on site
- Number of floors
- Distance between departments
- Location of kitchens and breakout areas
- Meeting rooms and visitor areas
- Staff working in warehouses or production areas
- Peak periods during the working day
A dispenser that technically serves 50 people may still be poorly positioned if half of those employees rarely have convenient access to it.
A Simple Office Water Dispenser Calculator
A useful way to estimate your requirement is to start with the number of regular daily users.
Step 1: Count Regular Users
Do not automatically use the total number of employees.
For a hybrid workplace, calculate how many people are normally present on your busiest typical days.
For example:
60 employees × 70% average office attendance = 42 regular users
Step 2: Divide Users by Your Planning Ratio
Using 20–25 users per dispenser as a starting point:
42 ÷ 25 = 1.68
That means you would generally plan for 2 water dispensers, rather than one.
Step 3: Check the Office Layout
If those 42 employees work across two floors, placing one dispenser on each floor may make more sense than putting both in one kitchen.
Step 4: Check Peak Demand
If everyone tends to fill reusable bottles first thing in the morning or after lunch, dispenser capacity and recovery rate become important.
A high-volume workplace may need fewer strategically selected dispensers rather than simply adding more low-capacity units.
Office Water Dispenser Requirements by Team Size
The following gives you a practical starting point rather than a fixed rule.
Small Office: Up to 20 Employees
For a small office, one water dispenser will often be sufficient if it is easy for everyone to reach.
A tabletop water cooler can work where counter space is available. A floor-standing model may be more suitable where there is a dedicated refreshment area.
Coffeeology currently offers both tabletop and floor-standing water coolers, including mains-fed and bottled options.
Medium Office: 21–50 Employees
For 21–50 employees, start by considering one or two dispensers.
A single unit can work in a compact office with moderate usage. Two units may be more appropriate where there are separate departments, floors or busy shared areas.
This is also the stage where water dispenser capacity becomes more important. A unit used heavily throughout the day needs to cope with repeated fills without becoming a bottleneck.
Larger Office: 51–100 Employees
For a 51–100-person office, two to five water points may be appropriate depending on the building layout and dispenser specifications.
Instead of automatically purchasing several identical units, assess where people actually work.
For example, a 75-person office could potentially have:
- One dispenser near the main staff kitchen
- One near another large work area
- One on a separate floor
- An additional high-capacity unit where demand is particularly high
The right configuration depends on usage rather than a simple employee count.
Large Office: More Than 100 Employees
For larger workplaces, treat each floor or major working area as a separate hydration zone.
A single central water cooler is unlikely to be the most practical arrangement when hundreds of employees are spread across a large building.
For larger offices, mains-fed water dispensers can also become attractive because they avoid regular bottle replacement and storage. Coffeeology's current range includes several mains-fed floor-standing and tabletop models, including contactless options. Coffeeology
What Is the Best Water Dispenser Ratio for an Office?
There is no universal legal water cooler ratio for offices in the UK.
This distinction is important.
The Workplace (Health, Safety and Welfare) Regulations 1992 require an adequate supply of wholesome drinking water, readily accessible at suitable places. The guidance does not prescribe a simple formula such as one dispenser for every 20 employees.
However, commercial planning guidance commonly uses approximately 20–25 people per dispenser as a starting point.
You should therefore use the ratio as a capacity and accessibility planning tool, not as a compliance figure.
Does a Large Office Need More Than One Water Cooler?
Usually, yes, but the reason is often accessibility rather than total water consumption.
Consider a 100-person office spread across four floors. Even if one high-capacity cooler could theoretically supply enough water, employees would have to travel to one location to use it.
Multiple hydration points can reduce unnecessary walking, queues and congestion around one kitchen.
They can also provide better access for employees who work away from the main office area.
The HSE states that drinking water should be easily accessible and provided at suitable places.
Where Should Water Dispensers Be Placed?
The best position is somewhere employees naturally pass during the working day.
Staff kitchens and breakout areas are obvious choices because people already use these spaces for refreshments.
For larger workplaces, consider additional locations near:
- Large departments
- Separate floors
- Reception and visitor areas
- Meeting spaces
- Warehouses
- Staff rooms
- Production or operational areas
Avoid placing a dispenser where access is blocked by furniture, equipment or heavy foot traffic.
You should also consider cleaning access, electrical requirements, drainage where applicable and proximity to a suitable water connection for mains-fed equipment.
Should You Choose One Large Dispenser or Several Smaller Ones?
This depends on usage patterns.
One high-capacity dispenser may make sense when most employees work in one area. Several smaller units may be more convenient when the workplace is divided into separate zones.
There is also a third option: use a high-output water tap or dispenser in the busiest area and smaller units elsewhere.
Coffeeology's water dispenser range includes floor-standing and tabletop models, along with instant tap systems and filtration products.
The decision should therefore consider capacity, location, water type, installation and expected usage, rather than just the number of machines.
Mains-Fed vs Bottled Water Dispensers for Offices
The type of dispenser can change the practical answer.
A mains-fed water cooler connects to the building's drinking-water supply. It does not depend on replacing large bottles, making it useful for workplaces with consistent daily demand.
A bottled water cooler can be useful where plumbing is unavailable or installation is impractical. However, the business needs space for replacement bottles and a process for changing them safely.
Coffeeology currently stocks both mains-fed and bottled water cooler options.
For offices with regular attendance and suitable plumbing, a mains-fed system may be worth considering. For temporary premises or locations without practical plumbing access, bottled systems can remain useful.
How Much Water Does an Office Need Each Day?
There is no single daily volume that applies to every workplace.
Water consumption varies with:
- Number of people present
- Length of the working day
- Indoor temperature
- Physical activity
- Individual drinking habits
- Whether employees fill reusable bottles
- Whether water is also used for meetings or hospitality
This is why calculating dispenser numbers purely from litres per day can be misleading.
Instead, look at both total daily demand and peak demand.
A dispenser might supply enough water over an eight-hour day but still create problems if 15 people try to fill bottles within a few minutes.
What About Hybrid Offices?
Hybrid working makes employee numbers less useful as a standalone measurement.
If an organisation has 100 employees but only 35–50 normally attend on a given day, buying equipment solely around the total headcount could lead to unnecessary capacity.
However, do not plan only around the quietest day.
Look at typical and peak attendance.
For example, if Tuesday and Thursday are the busiest office days, assess dispenser capacity around those periods. This gives facilities managers a more realistic picture of demand.
Do Meeting Rooms Need Their Own Water Dispenser?
Not necessarily.
A dedicated dispenser is usually unnecessary for a small meeting room if there is already an easily accessible water point nearby.
However, larger offices with frequent meetings, training sessions or external visitors may benefit from a water dispenser close to conference facilities.
For meeting areas, consider whether the dispenser needs to fill bottles, glasses, jugs or carafes. This can affect the required dispense height and output.
Maintenance Matters as Much as Quantity
Adding more water coolers does not solve a hygiene problem if the machines are poorly maintained.
Both mains-fed and bottled systems require appropriate cleaning, filter replacement and servicing.
Coffeeology provides a water cooler service contract that includes quarterly maintenance, sanitation, health checks, reservoir flushing and deep cleaning.
For mains-fed installations, Coffeeology also provides installation services covering components such as the isolator, pressure regulator, water block, pipework and water filter connection.
The HSE also stresses that workplace drinking water must be wholesome and accessible. HSE
The goal is therefore not simply to install the required number of machines. Your workplace should have a usable, maintained and accessible drinking-water system.
When Should an Office Add Another Water Dispenser?
Your existing setup may need another dispenser if:
- Employees regularly queue for water
- Staff travel a long distance to reach the nearest unit
- One floor has much higher usage than another
- The dispenser frequently struggles during busy periods
- Bottled units run out too quickly
- Employees avoid using a dispenser because it is inconveniently positioned
- A new department or floor has been added
- Office attendance has increased significantly
These signs are more useful than employee numbers alone.
A Practical Example: Planning for a 75-Person Office
Imagine a UK office with 75 employees, spread across three floors.
Around 60 people normally work on site each day.
Using the 20–25-person planning range:
60 ÷ 25 = 2.4
That suggests starting with three water points.
Rather than placing all three together, the business could consider one on each floor.
If the first floor contains a large team and experiences much higher demand, that area might need a higher-capacity model.
The same principle applies to warehouses, showrooms and other commercial workplaces. The physical layout and actual usage should shape the final equipment choice.
How to Choose the Right Number of Water Dispensers
Before ordering equipment, ask these questions:
How many people are normally on site?
Use real attendance rather than total employee numbers.
How is the office laid out?
Count floors, departments and separate work areas.
Where do people currently get drinking water?
Identify existing taps, kitchens and refreshment points.
When is demand highest?
Check morning arrivals, lunch periods and meetings.
How much water does each dispenser provide?
Review the manufacturer's output and recovery specifications.
Is mains plumbing available?
This can influence whether a mains-fed system is practical.
How much maintenance can the business manage?
Include filter changes, sanitation and servicing in the plan.
Is the business expected to grow?
Choose a setup that can cope with likely changes rather than today's headcount alone.
Coffeeology Water Dispensers for UK Workplaces
Coffeeology supplies water dispensers for offices, commercial premises and workplace environments, with options covering different installation and usage requirements.
The current water dispenser range includes mains-fed water coolers, bottled water coolers, tabletop models, floor-standing models, contactless units, instant taps and water filters. Coffeeology
For example, the range currently includes AA First Arctic Chill and Arctic Star models, Aquality water coolers, contactless water coolers and Billi instant tap systems.
This allows businesses to consider the number of users, office layout, installation requirements and expected demand before choosing equipment.
FAQs
How many water coolers do I need for 50 employees?
For 50 regular office users, two water dispensers can be a sensible starting point using a 20–25-user planning range. The final number should account for office layout and peak demand.
Is there a legal ratio of water dispensers to employees in the UK?
No specific dispenser-to-employee ratio is prescribed. UK workplace rules require an adequate supply of wholesome drinking water that is readily accessible at suitable places. HSE
How many water dispensers does a small office need?
A small office of up to around 20 regular users will often be adequately served by one conveniently positioned dispenser, provided it can handle the expected demand.
Should a large office have a water cooler on every floor?
Not automatically. However, separate floors may benefit from separate drinking-water points where a single central dispenser would make access inconvenient.
Are mains-fed water coolers suitable for busy offices?
They can be particularly practical for workplaces with consistent daily demand and suitable plumbing. Coffeeology offers a range of mains-fed water coolers for commercial use.
Is one water dispenser enough for 30 employees?
It may be, particularly in a compact office with moderate demand. However, two water points may provide better access if the team is spread out or usage is concentrated at certain times.
How often should an office water dispenser be serviced?
The service schedule depends on the dispenser, manufacturer requirements and workplace conditions. Coffeeology offers a service contract with quarterly maintenance, sanitation and health checks.
Final Takeaway
The best answer to “How many water dispensers does an office need?” is not simply a number.
Use 20–25 regular users per dispenser as an initial planning point, then check the office layout, peak demand, dispenser capacity and accessibility. A 40-person single-floor office may need a different setup from a 40-person workplace spread across several floors.
For UK businesses, the priority is to provide an adequate and accessible supply of wholesome drinking water.
If you are planning a new workplace hydration setup, Coffeeology's range of water coolers, dispensers, instant taps, filters and installation services provides several options to consider.