Every office with a gallon dispenser has the same scene once or twice a week: someone waits for the delivery, someone lifts a 19-kilogram bottle onto the stand, and someone finds the pantry corner stacked with empties. A bottleless office water dispenser removes the whole routine. It connects to the pantry line, or makes water from the air, and delivers hot and cold water on site for as long as the office is open.
This article explains what a bottleless dispenser is, what it replaces, what it costs an office in gallons today, and how Minairal installs and services one in Thailand.
In short: a bottleless office water dispenser produces its own drinking water at the point of use, filtered by reverse osmosis and remineralised, hot at 90°C and cold at 4°C, with no 19-litre gallons to order, lift, store or return. An office of 50 people stops ordering about 1,921 gallons a year.
What is a bottleless water dispenser?
It is a dispenser that makes water instead of holding it. A gallon dispenser is a cooler and a heater wrapped around a bottle someone else filled. A bottleless dispenser has the treatment inside: a connection to the existing water line, a filtration sequence, stainless steel tanks, and hot and cold delivery. Once installed, it runs on the line and on electricity, and nothing is delivered.
There are two ways to feed it.
From the pantry line: the Pure range
There is almost always a water line in an office pantry. A Pure reverse osmosis dispenser connects to it and runs five-stage reverse osmosis at 0.0001 micron, rated at 75 gallons a day, roughly 12 litres an hour. It then restores calcium, magnesium, potassium and sodium through a Biocera mineral filter, holds the water in stainless steel tanks with continuous UV-C sterilisation and internal recirculation, and dispenses hot at 90°C and cold at 4°C. Each system is sized for around 22 litres of daily use and installs in under an hour. While cooling, a Pure system draws around 40 to 50 W, which comes to a few baht a month on the electricity bill.
From the air: the Air range
Where no line reaches the right spot, or where the lease forbids plumbing work, an atmospheric water generator only needs a socket. The Air Top (13 litres a day on average) and the Air Stand (16 litres a day on average) both deliver hot and cold water. They operate between 30% and 80% relative humidity, and because an air-conditioned office is drier than an open room, the assessment checks the room where the unit will stand.
Which model fits an office pantry?
| Model | Source | Format | Tanks | Delivery | Typical place |
|---|---|---|---|---|---|
| Pure Countertop | Pantry line | Countertop | 7 L stainless steel, about 40–50 W while cooling | Hot 90°C, cold 4°C | Meeting rooms, reception, small pantry |
| Pure Floor | Pantry line | Floor-standing | 13 L stainless steel, about 40–50 W while cooling | Hot 90°C, cold 4°C | Main pantry, open-plan floor |
| Air Top | Ambient air | Countertop | 7 L | Hot and cold | Floor with no line, small team |
| Air Stand | Ambient air | Floor-standing | 11 L | Hot and cold | Floor with no line, larger team |
Most offices start with a Pure Floor in the main pantry and add a countertop unit per wing or meeting area, so that no one crosses the building for water. The configuration is set at the site assessment against the headcount on each floor.
How many 19-litre gallons does an office use?
The method used across this site counts two litres per person per day. Divide by 19 litres per gallon and the figures become concrete.
| Office | Calculation | Gallons a year |
|---|---|---|
| 20 people, 365 days | 20 × 2 L × 365 ÷ 19 | 768 |
| 50 people, 365 days | 50 × 2 L × 365 ÷ 19 | 1,921, about 37 a week |
| 50 people, 260 working days | 50 × 2 L × 260 ÷ 19 | 1,368, about 26 a week |
| 100 people, 365 days | 100 × 2 L × 365 ÷ 19 | 3,842 |
Each of those gallons is a delivery to receive, a 19 kg lift, a space in the pantry and an empty to return. The impact calculator has a 19-litre gallon setting if you want to enter your own headcount. Why offices are moving away from jars in the first place is covered in why offices are ditching water jars.
Is bottleless water safe for an office?
The question matters because an opened gallon sits on a dispenser for days. In a Pure system, the water is filtered by reverse osmosis at 0.0001 micron, which removes heavy metals and dissolved contaminants, polished by a post-carbon stage, then remineralised to an alkaline pH of 8.5 or above with 40 to 80 ppm of total dissolved solids. It is stored in stainless steel tanks with continuous UV-C sterilisation and internal recirculation, rather than in a plastic bottle emptied over several days.
Quality is checked, not assumed. TDS and pH are measured at every routine maintenance visit, and the business service plan includes a yearly test of the water produced on site by an independent ISO 17025 accredited laboratory, with the report available on request. The treatment sequence is set out on our water quality page, and our earlier article on office drinking water safety covers the practical side.
What does installation and service involve?
- Site assessment. We count the people per floor, find the pantry lines and note where the plumbing cannot be changed. You receive a configuration, a capacity and a maintenance plan.
- Installation. Systems are checked and configured before delivery, then placed, connected and tested on site. A Pure system installs in under an hour, and the installation ends with a report signed by both parties.
- Training. Your team is trained on the machines actually installed, with manuals and quick-start guides. From the next day, the gallon order can stop.
- Maintenance. Minairal technicians replace the pre-filter every four months on Pure and six months on Air, and the other cartridges every twelve months. Response is same day in most cases, 48 hours at the latest, Monday to Saturday, 9:00 to 18:00, in English and Thai.
Minairal runs service centres in Koh Samui, Phuket and Hua Hin, with coverage of offices in Bangkok served from the network. Thirteen people work at Minairal, eight of them in installation and maintenance, and more than 700 systems are in service across Thailand.
Frequently asked questions
Do we need plumbing work to replace the gallon dispenser?
Not usually. A Pure system connects to an existing line, normally in the pantry, in under an hour. Where there is no line, or the lease does not allow changes, an Air system only needs to be plugged in.
Does a bottleless dispenser give hot water for tea and coffee?
Yes. Pure systems deliver hot water at 90°C and cold water at 4°C. In the Air range, the Air Top and Air Stand deliver hot and cold.
How much water can one unit supply a day?
A Pure system is sized for around 22 litres of daily use, with reverse osmosis rated at roughly 12 litres an hour. An Air Top produces 13 litres a day on average and an Air Stand 16 litres. For larger floors, units are added where people actually work.
What happens to the system at the end of its life?
Systems are refurbished and returned to use, not discarded. One agreement covers survey, installation, training, maintenance and parts for the life of the system.
How do we get a quote for our office?
Request a site assessment with your headcount, the number of floors, where the pantry lines run and how many gallons you order today. The full picture for workplaces is on our office drinking water systems page.
