Joule Cyclone Air Indirect 100–300L Unvented Hot Water Cylinder

Joule Cyclone Air Indirect 100–300L Unvented Hot Water Cylinder

The Joule Cyclone Air Indirect range (100L, 125L, 150L, 170L, 200L, 250L, 300L) provides precision-engineered, mains-pressure hot water for homes and light commercial settings using a boiler or compatible heat source. These cylinders pair robust Duplex stainless steel construction with an internal expansion air bubble and a pre-plumbed cold feed assembly for a clean, installer-friendly setup and consistent, energy-efficient hot water production.

Key Features:

• Capacities from 100L to 300L – fits a wide range of property requirements
• Indirect coil design – rapid hot water recovery via high-efficiency coil, heated by a boiler or renewables
• Pre-fitted 3kW Incoloy immersion heater for electric backup or off-peak hot water heating
• Main pressure performance – delivers strong, fast hot water to multiple taps and appliances
• Internal expansion air bubble – eliminates need for a separate external expansion vessel
• Pre-plumbed cold feed assembly streamlines installation and ensures quality
• Duplex stainless steel body for maximum corrosion resistance and long-term durability
• Dense PU foam insulation (CFC/HCFC free) for minimal heat loss and best-in-class energy retention
• Factory-fitted safety controls – temperature/pressure relief valve (set at 6 bar, 95°C), inlet control group, tundish, and zone valve
• Modern white “white goods” style casing for a premium, easy-clean look
• 25-year manufacturer warranty (2 years on controls/components)

Technical Specifications (examples):

• Capacities: 100L, 125L, 150L, 170L, 200L, 250L, 300L
• Diameter: approx. 540mm; Height example: 150L – 1196mm; 170L – ~1350mm; 200L – 1490mm; 250L – ~1815mm; 300L – ~2060mm
• Weight (empty/full): 200L ~46/243kg; 250L ~49/299kg; 300L ~55/355kg
• Indirect coil rating: high gain; designed for rapid recovery with modern combi/system boilers
• Immersion heater: factory-fitted, single phase, 3kW at 230V
• Max working pressure: 3 bar (inlet control set)
• Tested to BS EN 12897:2006
• Standing losses: 44W (100L) up to 92W (300L); ErP rating B/C

Other Details:

• All plumbing, safety, and electrical connections clearly labelled and easily accessible
• Supplied with full installation instructions and quality component pack
• Compatible with gas, oil, or renewable boiler systems
• Ideal for new build, retrofit, or upgrade projects

Why Choose Joule Cyclone Air Indirect?

Choose Joule Cyclone Air Indirect for a next-generation, installer-friendly hot water cylinder that maximises energy efficiency, installation speed, and long-life reliability. Its internal expansion and high-flow coil make it a perfect fit for modern UK hot water specification and high-occupancy homes.

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