T Griffin install unvented hot water cylinders and system boilers in Bognor Regis and the surrounding areas in West Sussex
What is an Unvented Hot Water Cylinder?
An unvented hot water cylinder is a sealed unit that stores and supplies hot water throughout your home without requiring a separate cold water tank in your loft. Unlike traditional vented cylinders that rely on gravity-fed tanks in the attic, unvented cylinders are pressurised systems connected directly to the mains water supply, providing excellent water pressure and flow rates to all outlets in your property.
Modern unvented cylinders are highly efficient, compact, and offer a space-saving solution for homes without room for traditional tank and cylinder installations.
Advantages of Unvented Hot Water Cylinders
- Superior water pressure – Mains pressure means consistent, powerful flow at all taps and showers throughout your home, even on the top floor.
- Space-saving design – No need for a bulky cold water tank in your loft, freeing up valuable storage space and reducing loft clutter.
- Improved water temperature consistency – Mains-fed systems maintain stable water pressure and temperature, delivering a better shower experience.
- Compact and discreet – Unvented cylinders are sleek and can be installed in cupboards, under stairs, or in utility rooms, hidden from view.
- Faster hot water delivery – Reduced waiting time for hot water to arrive at taps and showers due to direct mains connection.
- Energy efficient – Modern unvented cylinders are highly insulated, reducing heat loss and keeping your hot water hot for longer.
- Lower maintenance – Fewer components and no external tanks mean less to maintain and fewer potential problems.
- Future-proof solution – Unvented systems work excellently with modern heating systems, heat pumps, and renewable energy installations like solar thermal.
- Better for high-demand homes – If your household uses a lot of hot water simultaneously (multiple showers, baths, dishwashers running at once), unvented cylinders deliver superior performance.
Types of Unvented Hot Water Cylinders
- Direct Unvented Cylinders – These heat water directly using an immersion heater or integrated electric heating element. Ideal for homes with electric heating or as a backup system.
- Indirect Unvented Cylinders – These use a heat exchanger connected to your central heating boiler, allowing your boiler to heat the water stored in the cylinder. Most common in homes with gas or oil heating.
- Combination Unvented Cylinders – These combine both direct and indirect heating, offering flexibility and guaranteed hot water even if your boiler isn’t operating.
- Solar-Ready Unvented Cylinders – Designed with connections for solar thermal panels, these cylinders maximise renewable energy use and reduce reliance on your boiler.
At T Griffin, we’ll help you choose the right type of unvented cylinder for your specific needs and heating system.
Installation Process
Installing an unvented hot water cylinder is a specialised task that requires expert knowledge, proper certification, and adherence to building regulations. At T Griffin, our experienced engineers handle every stage professionally:
- System Assessment – We evaluate your current plumbing and heating system to determine the best cylinder type and size for your home’s hot water demands.
- Sizing and Specification – We calculate the correct cylinder capacity based on your household’s water usage patterns and number of occupants.
- Building Regulations Compliance – All unvented cylinder installations must comply with building regulations. We ensure every installation meets these requirements.
- Pressure Relief Systems – We install all necessary safety devices, including pressure relief valves, expansion vessels, and temperature relief valves to protect your system.
- Connection to Mains Supply – We safely connect your cylinder to the mains water supply with proper isolation valves and filtration where needed.
- Integration with Heating System – For indirect cylinders, we connect the cylinder to your boiler’s heating circuit, ensuring optimal heat transfer and temperature control.
- System Testing and Commissioning – Once installed, we thoroughly test all safety devices, check water pressure, and commission the system to ensure it operates safely and efficiently.
- Documentation and Certification – We provide full installation documentation and certification for building control and warranty purposes.
Why Choose T Griffin for Unvented Cylinder Installation?
At T Griffin, we draw experience and workmanship from generations before us. Cyril Griffin first started his own plumbing and heating firm in 1964, helping convert London from town gas to the natural alternative. Cyril’s efforts saw him as one of the earliest members of the Corgi gas membership. Cyril’s son, Mark Griffin completed his apprenticeship and started his own company and was also a Corgi registered member. Mark is still a part of the team today.
That brings us to today. Ted, the son of Mark, started T Griffin based on the same values and quality passed down from generations of experience.
At T Griffin, we’ve been Gas Safe registered for over 10 years and are proud accredited Worcester Bosch installers. Our engineers are fully trained and competent in unvented cylinder installation, with extensive knowledge of Building Regulations and safety requirements. We use only premium quality cylinders from trusted manufacturers and install them to the highest standards.
We look forward to helping you.
Is an Unvented Cylinder Right for Your Home?
Unvented cylinders are ideal if:
- You want better water pressure and flow rates throughout your home
- You’re looking to free up space in your loft
- Your household has high hot water demands
- You’re upgrading your plumbing system
- You want to prepare for future renewable energy installations (solar thermal, heat pumps)
- You’re renovating or extending your property
- You want a modern, low-maintenance hot water solution
We can help you decide whether an unvented cylinder is the right choice for your property. Our free consultation will consider your home’s layout, heating system, water usage patterns, and budget.
Unvented Cylinder Maintenance and Support
Unvented cylinders require periodic maintenance to ensure they continue operating safely and efficiently. At T Griffin, we offer:
- Annual safety checks – We inspect all safety devices, check pressure settings, and test temperature and pressure relief valves.
- Servicing and repairs – If your cylinder develops a fault, our experienced engineers can diagnose and repair the problem quickly.
- Expansion vessel replacement – Over time, expansion vessels may need replacing to maintain system safety and performance.
- Ongoing support – We’re always available if you have questions about your cylinder or need technical advice.
Cost of Unvented Cylinder Installation
The cost of installing an unvented hot water cylinder depends on several factors:
- Cylinder type and capacity – Larger cylinders and specialist models cost more
- Your current system – Replacing an existing cylinder is typically cheaper than new installation
- Complexity of installation – The layout of your home and plumbing may affect installation complexity
- Additional work needed – Pressure relief systems, expansion vessels, and pipework modifications may be required
Get a free quote – Contact T Griffin today for a detailed assessment and competitive quote. We’ll visit your property, evaluate your needs, and provide a transparent price with no hidden costs.
Get a Free Survey and Quote
To find out if an unvented hot water cylinder would be suitable for your home and to get an accurate installation quote, contact T Griffin today.
Complete our online contact form or call us today to arrange your free, no-obligation home survey.
Our friendly team will discuss your requirements, answer your questions, and provide you with a competitive quote backed by our commitment to quality and service.
Areas We Cover
We provide unvented hot water cylinder installation and servicing to homes and businesses in West Sussex, covering the following locations:
Not in our list? Contact us anyway – we may be able to help or recommend a trusted engineer in your area.