A standard water purifier can’t handle a large office. The result? Constant refills and employee frustration. The solution is a commercial-grade RO system. We’ve curated the 5 best models available in Bangladesh to ensure your business never runs dry.
What to Look for in a Large Office Water Purifier?
Before we dive in, here are the key features every large office should prioritize:
High Purification Capacity (Liters/Hour): Can it produce enough pure water to keep up with demand during peak hours?
Large Storage Tank: A big tank (20-25 liters or more) ensures a steady supply even during power outages or high usage.
Commercial-Grade Build Quality: The system must withstand constant use without frequent breakdowns.
RO Technology: For most areas in Dhaka and other major cities, Reverse Osmosis (RO) is essential to remove dissolved salts, heavy metals, and a wide range of contaminants.
Ease of Maintenance: A system that is easy to service will have less downtime.
The Top 5 Office Water Purifiers for Large Offices in Bangladesh
1. WaterMan BD Commercial RO Series 400GPD
Best For: The Ultimate High-Traffic Solution
This is the gold standard for large offices where the water dispenser is constantly in use. With a massive 400 Gallons Per Day (GPD) capacity, it can serve hundreds of employees without breaking a sweat.
Key Features:
Capacity: 400 gpd
Technology: 5 Stages
Purification Stage: RO Element: Membrane (AQUA HEART
Reserve Tank Capacity: 11 Gallon
Production Capacity: 67 (±) Liters per Hour
Family Usable: 85-110 Persons
Warranty: 365 Days
Pros: Unmatched output, eliminates waiting, superior build quality for 24/7 use.
Cons: Higher initial investment; requires professional plumbing assessment.
2. DENG YUAN TW-400 (5 Stages 400-GPD)
Best For: The Ultimate High-Traffic Solution
Designed for non-stop office environments, this 400 GPD powerhouse delivers a relentless supply of pure water, effortlessly meeting the demands of hundreds of employees.
Key Features:
Capacity: 400 gpd
Technology: 5 Stages
Purification Stage: RO Element: Membrane (CSM Korea)
Reserve Tank Capacity: 20 Gallon
Production Capacity: 67 (±) Liters per Hour
Family Usable: 85-110 Persons
Warranty: 365 Days
Pros: Unmatched output, eliminates waiting, superior build quality for 24/7 use.
Cons: Higher initial investment; requires professional plumbing assessment.
3. Lan Shan LSRO-400 RO Water Purifier
Best For: The Ultimate High-Traffic Solution
In a busy office, the water dispenser is always on. This unit is built for that reality, with a massive 400 GPD capacity that ensures no one is ever left waiting.
Key Features:
Capacity: 400 gpd
Technology: 5 Stages
Purification Stage: RO Element: USA technology
Reserve Tank Capacity: 10 Gallon
Production Capacity: 67 (±) Liters per Hour
Family Usable: 85-100 Persons
Pros: Unmatched output, eliminates waiting, superior build quality for 24/7 use.
Cons: Higher initial investment; requires professional plumbing assessment.
4. Kent Grand Plus Commercial 15-Litre
Best For: Reliability and Brand Trust
A trusted name adapted for office use. This model features a large 15-liter storage tank and Kent’s signature zero-water-wastage technology, making it an eco-conscious and reliable choice.
Key Features:
Capacity: 15-Litre storage, suitable for 40-60 people
Technology: RO + UV + UF + TDS Controller
Special Feature: Mineral RO technology and Zero Water Wastage
Best For: Medium to large offices looking for a reputable brand with good after-sales service.
Pros: Excellent purification, trusted brand, water-saving feature.
Cons: Purification rate per hour is lower than dedicated commercial units; better for offices with staggered breaks.
5. Pureit Ultima Mineral RO CDR – 18 L
Best For: All-Round Performance and Large Storage
Pureit’s Ultima model is designed for high consumption. Its 18-liter capacity is one of the largest integrated tanks on the market, ensuring water is always available for a busy team.
Key Features:
Capacity: 18-Litre storage
Technology: RO + Electrolyte + Germ Kill Kit
Special Feature: 5-step purification with added essential minerals
Best For: Offices prioritizing large on-the-spot storage and mineral-enriched water.
Pros: Huge storage, compact design for its capacity, adds beneficial minerals.
Cons: Like the Kent, the production speed is designed for refilling the tank, not constant direct flow.
Your Most Important Decision: The Annual Maintenance Contract (AMC)
For any large office, the purchase is only the beginning. An Annual Maintenance Contract (AMC) is not optional – it’s critical. An AMC ensures:
Uninterrupted Pure Water: Regular filter changes prevent slowdowns and contamination.
Predictable Budgeting: No surprise repair bills.
Zero Hassle: Your facility manager doesn’t have to worry about servicing; it’s all handled automatically.
Still Not Sure Which Model is Right for You?
The best model depends on your specific office size, water pressure, and usage patterns. There is no one-size-fits-all solution.
Let the experts at WaterMan BD help you decide. We offer:
Free Water Testing to analyze your tap water quality.
Free Site Assessment to recommend the perfect capacity and model.
Professional Installation by certified technicians.
Comprehensive AMC Plans to protect your investment.
Don’t leave your team’s health and productivity to chance. Contact WaterMan BD today for a free consultation and get a tailored quote for your large office!
