Joule Invacyl Direct Unvented Hot Water Cylinder (90–300 Litres)

Joule Invacyl Direct Unvented Hot Water Cylinder (90–300 Litres)

The Joule Invacyl Direct Unvented Cylinder is the trusted choice for efficient, UK-compliant hot water storage, available in a wide range of sizes from 90 to 300 litres. Designed to perform with factory-fitted electric immersion heaters, each Invacyl cylinder features a robust construction, high-efficiency smooth coil, and an attractive, modern casing. The range is ideal for domestic properties seeking reliable, mains pressure hot water throughout the home.

Key Features:

• Available in 90L, 120L, 150L, 180L, 210L, 250L, and 300L sizes to suit all property types
• Direct configuration – heated by factory-fitted electric immersion elements, no need for a primary boiler circuit
• Unvented mains pressure design delivers high-flow hot water to multiple outlets
• Constructed from premium Duplex stainless steel for outstanding corrosion resistance and long life
• Callefi safety group and compression fittings supplied as standard for fast, safe installation
• User-friendly grey metallic case with dense CFC/HCFC-free polyurethane foam insulation—energy efficient and stylish
• 25-year manufacturer’s warranty on the cylinder with annual service and T&Cs, plus 2 years on components
• WRAS-approved and fully compliant with UK Building Regulations and Part G standards
• Factory-fitted temperature and pressure relief safety devices

Technical Specifications:

• 90L: Height 1030mm x Diameter 540mm; Weight: empty 35kg / full 158kg
• 120L: Height 1160mm x Diameter 540mm
• 150L: Height 1296mm x Diameter 540mm
• 180L: Height 1456mm x Diameter 540mm
• 210L: Height 1616mm x Diameter 540mm
• 250L: Height 1820mm x Diameter 540mm
• 300L: Height 1980mm x Diameter 545mm; Weight: empty 55kg / full 355kg
• Insulation: Dense PU foam with ozone depletion factor zero
• Connections: Screwed with compression fittings for fast install
• Maximum working pressure: 3.5 bar (with supplied inlet controls)
• Electric element rating: Typically 3kW; factory fitted (check specific model supplied)

Other Details:

• All models include factory-fitted Callefi safety components
• Pre-plumbed for quick connection to cold mains
• Sleek metallic grey outer shell for premium appearance
• Compatible with time switches and thermostatic controls
• Minimum recommended pressure/flow: 1.5 bar and 25 l/min
• Full installation manual and expansion vessel supplied

Why Choose the Joule Invacyl Direct Unvented Cylinder?

Choose Joule Invacyl Direct for its blend of performance, efficiency, and ease of installation. These cylinders are built from industry-leading materials for unmatched durability and hot water performance. With a cylinder capacity range tailored to any home, robust safety controls, and a best-in-class 25-year warranty, Invacyl sets the new standard in unvented electric hot water storage for the UK market.

Please note: Delivery times may vary depending on location, with specific details outlined below.

Standard Delivery

UK Mainland 

• Delivery Time: 2–4 working days
• Free Delivery on all orders

Express Delivery

UK Mainland

• Delivery Time: 1–3 working days
• Delivery fee of £15

Channel Islands

• Postcodes Covered: GY*, IM*, JE* 
• Minimum Order: £50
• Delivery Fee: £70

Northern Ireland, Offshore Territories & Scottish Islands 

• Postcodes Covered: BT*, HS*, KW, ZE
• Minimum Order: £50
• Delivery Fee: £35

Same Day Delivery 

• Eligible Postcodes:
  E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW*
• Minimum Order: £50
• Same Day Delivery Fee: £60
• Special Requests or Locations:
  For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.

Collections

Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.

Collection address: 284 Water Rd, Unit 9, London, HA0 1HX