DirectSlimline Hot Water Cylinders
Narrow-footprint direct storage.
Megaflo Eco Slimline 100 Litre Direct Unvented Hot Water Cylinder
£989.00EX VAT · £1,186.80 INCView product
Megaflo Eco Slimline 125 Litre Direct Unvented Hot Water Cylinder
£1,130.00EX VAT · £1,356.00 INCView product
Megaflo Eco Slimline 150 Litre Direct Unvented Hot Water Cylinder
£1,354.00EX VAT · £1,624.80 INCView product
Megaflo Eco Slimline 170 Litre Direct Unvented Hot Water Cylinder
£1,471.00EX VAT · £1,765.20 INCView product
Megaflo Eco Slimline 200 Litre Direct Unvented Hot Water Cylinder
£1,579.00EX VAT · £1,894.80 INCView product
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Sizing, regulations, installation. Our team has been answering these questions for over 25 years.
Our direct slimline hot water cylinders are designed specifically for properties where space is at a premium. These compact units deliver the same reliable heating performance as our standard direct hot water cylinders, but in a narrow profile that fits comfortably into airing cupboards, utility rooms, and tight spaces. Each cylinder features integrated electric immersion heaters, giving you complete independence from central heating systems. This means lower installation costs and fewer components that could require maintenance down the line. The built-in heating elements provide consistent temperature control, ensuring hot water is always available when you need it. We stock only stock tanks manufactured with high-quality materials that resist corrosion and maintain performance over years of regular use. Advanced insulation technology keeps your energy costs manageable whilst delivering reliable hot water for daily needs. If you're considering a pressurised system for improved water flow, our Megaflo hot water cylinders might be worth exploring. Alternatively, properties with existing boiler systems could benefit from our indirect slimline hot water cylinders for space-saving installations.
Direct Slimline Hot Water Cylinders FAQs
What's the difference between a direct and indirect slimline cylinder?
A direct cylinder heats water using only its integrated electric immersion heater, with no coil connection to a boiler. This makes it ideal for properties without a central heating system, or as a standalone hot water solution. If you already have a boiler and want it to do the heavy lifting, an indirect slimline cylinder would suit you better.
Will a slimline cylinder fit my existing airing cupboard?
Slimline cylinders are built with a reduced diameter compared to standard cylinders, typically making them a better fit for narrow airing cupboards or tight utility spaces. Always check the diameter and height listed against your cupboard measurements before ordering, as capacity and dimensions vary across the range. Leave a little clearance around the cylinder for pipework and future maintenance access.
How long will hot water last with only an immersion heater?
Recovery time depends on the cylinder's capacity and the wattage of the immersion element, but most domestic slimline cylinders will reheat a full tank within one to two hours. Many households run the immersion on an economy timer to heat water overnight or during off-peak electricity periods. For higher demand properties, choosing a larger capacity cylinder or a dual-immersion model will help keep pace with usage.
What size cylinder do I need for my household?
As a rough guide, allow around 35–45 litres of stored hot water per person for a typical household, though this varies with bathing habits and number of bathrooms. A two-bedroom property often suits a 90–120 litre cylinder, while larger homes with multiple bathrooms may need 150 litres or more. If you're unsure, it's worth erring on the larger side within your available space, since running out of hot water is more common than having too much.
Do these cylinders need to be installed by a qualified professional?
Yes, installation should be carried out by a competent, qualified installer, and any associated electrical work must comply with Part P of the Building Regulations. This typically means work is either carried out by a registered electrician or notified to your local authority building control. A professional installer will also ensure correct sizing of the immersion circuit and any required safety devices such as expansion vessels or pressure relief valves.
What materials are these cylinders made from, and how long do they last?
Our slimline cylinders are manufactured from grades of copper or corrosion-resistant stainless steel, both of which are well-suited to constant contact with hot water over many years. Each is fitted with foam insulation to reduce standing heat loss and keep running costs down. With correct installation and periodic checks on the immersion element and any anode (where fitted), these cylinders are built to give reliable service for well over a decade.