Commercial unvented hot water cylinder services in London

While your competitors surge ahead with modern solutions, don't let outdated systems leave your operations in hot water. Our G3-qualified engineers deliver superior unvented cylinder solutions that ensure consistent water pressure and optimal performance for your commercial operations.

Maximum water pressure guaranteed for peak performance
Zero disruption guarantee with flexible 7-day scheduling
G3 certification for complete peace of mind
Energy bill savings and reduced carbon footprint

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SERVICE YOU CAN TRUST

Why partner with Fantastic Services?

Unmatched technical excellence

Meet Fantastic Services’ elite team of G3-qualified specialists! With countless successful installations and maintenance projects under their belts, they're the experts businesses trust to keep their hot water systems running at peak performance.

Every project is executed with meticulous attention to safety standards because we know your business can't afford anything less than perfection.

Your business is our priority

Time is money, and we respect both! That's why we're available all week long, even on bank holidays. No more disrupting your peak hours or compromising your operations.

Plus, we believe in complete transparency: clear hourly rates, zero surprises in your invoice, and a rock-solid 12-month guarantee that puts your mind at ease.

The gold standard in service delivery

When a Fantastic engineer walks through your door, you're getting more than just a technician; you're getting a professional equipped with cutting-edge tools and years of commercial expertise.

From boutique hotels to industrial complexes, we adapt our service style to your specific sector, ensuring your business keeps flowing smoothly while we work our magic behind the scenes.

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Proud member of:

Fantastic Services professional with equipment

OUR PROCESS

Revitalise your hot water system in 4 simple steps

Book a survey

Schedule a survey visit slot through our flexible booking system.

Expert assessment

A G3-qualified engineer will thoroughly evaluate your system's condition and provide a detailed estimate.

Fast-track your service

Lock in your preferred time slot as soon as you approve the quote. We work around your schedule.

System protection

The G3-certified team will arrive ready to elevate your hot water system's performance.

Get a free no-obligation quote for your service

Call us on 020 4525 3292 Or request a quote online

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Warning signs your business needs unvented cylinder service

Your business relies on consistent hot water performance. Here are the critical issues that signal your unvented cylinder system requires professional intervention:

Expansion pipe discharge and continuous water loss;
Combination valve failures;
Inadequate water pressure;
System vibration and noise;
Water flow inconsistencies;
Structural integrity issues;
Limescale accumulation;
Temperature regulation problems.

Whether you're experiencing a single issue or multiple concerns, the Fantastic G3-qualified engineers are equipped to restore your system's optimal performance. We provide comprehensive installation, replacement, maintenance, and repair services tailored to commercial operations.

Unvented cylinders: The future of hot water systems

Leading businesses across London are upgrading to unvented cylinder systems, and for good reason.

These advanced systems deliver superior performance by drawing water directly from the mains, providing powerful pressure and flow rates that meet demanding commercial requirements. Without the need for a traditional water tank, these systems offer unprecedented installation flexibility across your premises.

Key benefits for your business:

Enhanced operational efficiency with consistent, high-pressure water supply;
Silent operation that eliminates disruptive tank refill noise;
Superior insulation and integrated pipe protection prevent costly winter disruptions;
Reduced maintenance requirements maximise your return on investment.

The Fantastic Specialists can install, maintain, and repair all commercial unvented systems, including premium Megaflo units. We offer both electric immersion and gas-powered solutions to match your energy preferences and operational demands.

Fantastic Services in numbers

50,000

customers each month

2,000+

trained Fantastic professionals

500+

franchise partners on three continents

Over 100

commercial cleaning & maintenance services

14+

years of industry experience

Frequently asked questions

How often should commercial unvented cylinders be serviced?

Annual servicing is highly recommended and often required to maintain warranties.

What size system do I need for my business?

Systems range from 70L to 2,500L. We'll assess your business needs and recommend the optimal size for your operations.

Is my water supply suitable?

Your water supply should deliver a minimum of 1.5 bar dynamic pressure during peak demand. While our systems can function at pressures as low as 1 bar dynamic, we recommend higher pressure for commercial environments to ensure consistent performance.

To guarantee robust flow rates across your facility, your incoming mains should meet professional specifications: a minimum of 25mm MDPE or 22mm copper piping.

What areas do you cover?

We service all commercial properties within the M25 zone.

Additional services for your business

Industries we serve

Estate Agents, Property Investors, Built to Rent

Embassies, Consulates and High Commissions

Short Term Lettings

Offices and Commercial Properties

Facility Management and Block Management

Hospitality

Retail

Healthcare

Churches and Charities

Schools and Nurseries

Make a splash with superior hot water solutions!

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