The Mixergy 180 Litre R290 iHP Integrated Heat Pump Cylinder is a smart unvented hot water cylinder with a built‑in R290 air‑to‑water heat pump, designed to deliver highly efficient, low‑carbon hot water for all‑electric homes.

Product Description

Part of the Mixergy iHP X R290 range, the 180L model combines a Duplex stainless steel cylinder with a factory‑fitted, top‑mounted R290 heat pump head. Using patented top‑down stratified heating, it delivers usable hot water in under 30 minutes while using around three times less electricity than a conventional direct electric cylinder. The system connects to the Mixergy app for machine‑learning schedules, time‑of‑use tariff optimisation and live hot water level indication.

Key Features

• Integrated R290 heat pump: Compact indoor air‑to‑water heat pump built into the cylinder head – no separate outdoor unit required.
• High efficiency: Approximate CoP of 3.4 and ErP A+ rating, significantly reducing running costs vs direct‑only cylinders.
• Fast hot water: Top‑down heating provides usable hot water in under 30 minutes, up to 10× faster than conventional integrated HP cylinders.
• Smart control: Mixergy app with machine learning, smart scheduling, Boost, usage insights and support for time‑of‑use tariffs.
• Medium‑size capacity: 180L volume suited to typical family homes and all‑electric properties.
• Engineered to last: 25‑year cylinder warranty and 5‑year heat pump head warranty (typical Mixergy terms and conditions).
• Modular design: Cylinder and heat pump head supplied as separate pieces for easier handling and installation.

Technical Specifications

• Model: MX-180-IH2-579 – 180L Integrated HP R290 Smart Cylinder.
• Nominal capacity: 180 litres.
• Cylinder material: Duplex stainless steel.
• Refrigerant: R290 (propane), typical charge ~150 g.
• Heat pump electric rating: 0.55 kW.
• Heat pump max. power output: 1.5 kW.
• Coefficient of performance (CoP): 3.4 (datasheet value).
• Achievable hot water temperature (heat pump only): Up to 59°C.
• Back‑up immersion heater: 2 kW 1¾″ BSP (3 kW immersion shown on some reseller specs; minimum 2 kW from Mixergy datasheet).
• Standing heat loss: 0.54–1.34 kWh/24 h (iHP X R290 180L range).
• ErP rating: A+.
• Electrical supply: 13 A, 230–240 V~ single phase.
• Air operating range: −7°C to +35°C ambient air.
• Sound power level: Around 50 dB.
• Airflow: Approx. 500 m³/h via ducting.
• Air duct diameter: 150 mm (intake and exhaust).
• Water connections: 22 mm compression.

Dimensions & Weights

• Height: 1695 mm.
• Diameter: 580 mm.
• Weight (empty): 90 kg.
• Weight (full): 270 kg.
• Minimum reheat time (15–50°C, partial/top‑down): 30 minutes.
• 70% charge reheat (15–50°C): Approx. 140 minutes.
• 100% charge reheat (15–50°C): Approx. 201 minutes.

Included Components

• Unvented kit: pressure reducing valve, check valve, pressure & temperature relief valve, expansion relief valve, tundish and expansion vessel (including mounting bracket and 3/4″ × 22 mm adapters).
• Back‑up immersion heater (min. 2 kW, 1¾″ BSP, factory‑fitted).
• Integrated R290 heat pump head unit.
• Powerline‑to‑Ethernet adapter and Ethernet cable.
• Control gauge and onboard electronics.
• User Guide and iHP X installation/servicing instructions.

Applications & Notes

• Ideal for medium‑sized all‑electric homes and apartments where external heat pumps are impractical or undesired.
• Suitable for both retrofit and new‑build projects, installing similarly to a standard unvented cylinder with additional external wall ducting for the heat pump air path.
• Optimised for smart tariffs and eco‑operation via the Mixergy app’s ML‑driven scheduling and energy insights.
• Must be installed and commissioned by a G3‑qualified installer in accordance with Mixergy’s iHP X installation manual and local building regulations.