Mitsubishi
The Mitsubishi Ecodan R290 Ultra Quiet monobloc PUZ-WZ85VAA (8.5kW) is an A+++ ErP rated air source heat pump with a SCOP of 4.47 at 35°C and a maximum flow temperature of 75°C.
The Mitsubishi Ecodan R290 Ultra Quiet monobloc PUZ-WZ85VAA (8.5kW) is an air source heat pump designed for UK domestic heating applications. This page provides technical specifications, performance data, and installation guidance for heating engineers. Homeowners can also find essential information regarding its operation and efficiency. The unit utilises R290 refrigerant and offers a nominal heating capacity of 8.5kW, suitable for various property types.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The Mitsubishi Ecodan R290 Monobloc Air Source Heat Pump, model PUZ-WZ85V/YAA, delivers a nominal heating capacity of 8.5kW, maintaining this output down to -7°C ambient temperatures. It operates with R290 refrigerant, which has a Global Warming Potential (GWP) of 0.02 and a charge of 0.6kg. The unit achieves a Seasonal Coefficient of Performance (SCOP) of 4.47 at 35°C and 3.51 at 55°C, earning an ErP rating of A+++ at 35°C and A++ at 55°C. Maximum flow temperature is 75°C, with operation down to -25°C outdoor ambient. Sound power is rated at 54 dB LwA, with a sound pressure level of 40 dB at 1m, contributing to its 'Ultra Quiet' designation. Electrical supply is single-phase 230V, requiring a 25A MCB. The outdoor unit measures 1040mm (H) x 1050mm (W) x 480mm (D) and weighs 103kg. Minimum water flow rate is 27 litres per minute, with 28mm pipework recommended.
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Specifications on this page are extracted from the manufacturer brochure. Always cross-check against the latest datasheet before commissioning or quoting. Last updated 28 June 2026.