Mixergy X Indirect 500L Cylinder

The Mixergy 500 Litre Indirect Unvented Smart Cylinder is a large-capacity, smart unvented hot water cylinder designed for use with a boiler via an indirect coil, combining Mixergy’s unique volumetric heating with app-based control to serve high‑demand properties.

Product Description

This 500L Mixergy indirect cylinder uses a high-efficiency primary coil connected to a gas or oil boiler, while Mixergy’s patented top‑down stratified heating ensures you only heat the volume of water you need. It delivers hot water up to 10 times faster than conventional cylinders and connects to the Mixergy app, allowing users to see hot water levels, set schedules, boost on demand and integrate with smart tariffs and renewables.

Key Features

• Large 500L capacity: Designed for larger homes, HMOs or light commercial applications with high hot water demand.
• Indirect coil heating: Smooth-tube, high-efficiency primary coil for fast heat-up when connected to a boiler.
• Unique volumetric heating: Heats from the top down, only heating what you need and helping to reduce energy consumption.
• Smart cylinder: Integrated sensors and control gauge show live hot water percentage; full control via the Mixergy app.
• Future-ready: Compatible with PV, heat pumps and smart tariffs, treating the cylinder as a thermal battery.
• High quality build: Duplex stainless steel vessel with 50mm polyurethane foam insulation.
• Long warranty: Typically 25-year cylinder warranty (subject to Mixergy terms and correct installation).

Technical Specifications

• Model: MX-500-IND-709 – 500L Indirect Unvented Smart Cylinder.
• Nominal capacity: 500 litres.
• Type: Unvented, indirect (boiler-fed) smart hot water cylinder.
• Cylinder material: Duplex stainless steel.
• Insulation: 50mm CFC/HCFC-free polyurethane foam.
• Water connections: 22mm compression (primary and secondary).
• Electrical supply: 230–240 V~, typically 16 A for controls and immersion.
• Immersion heater: 3 kW 1¾″ BSP backup immersion (standard on Mixergy indirect models).
• Primary coil: High-efficiency indirect coil sized for rapid recovery (exact kW rating dependent on boiler and flow conditions).

Dimensions & Weights

• Approx. height: Around 2000–2100 mm (tall floor-standing cylinder form factor).
• Approx. diameter: Around 580–600 mm standard diameter shell.
• Weight (empty): Typically in the 70–90 kg range.
• Weight (full): Approximately 570–590 kg once filled (vessel plus 500L of water).

Included Components

• Inlet control group / pressure reducing valve assembly.
• Expansion vessel sized for 500L capacity.
• Tundish.
• Temperature & pressure relief valve.
• High-limit thermostat and dual thermostat for boiler/immersion control.
• 2-port motorised zone/diverter valve for primary circuit control.
• 3 kW immersion heater (backup/boost).
• Powerline-to-Ethernet adapter and Ethernet cable for smart connectivity.
• User guide and installation instructions.

Applications & System Notes

• Ideal for large dwellings, multi‑bathroom homes, HMOs or small commercial sites needing substantial stored hot water.
• Works with boilers as the primary heat source while enabling smart control, tariff optimisation and future integration with PV or heat pumps.
• Offers fast partial reheat thanks to top‑down volumetric heating, improving comfort and reducing boiler run times.
• Must be installed and commissioned by a G3‑qualified installer in accordance with building regulations and Mixergy’s installation manual.