Baxi
The Baxi HP40/50-7-1PHMB is an 8.4 kW monobloc air-source heat pump. It uses R32 refrigerant and has a SCOP of 5.03 at 35°C.
The Baxi HP40/50-7-1PHMB is an 8.4 kW monobloc air-source heat pump designed for domestic heating applications in the UK. This inverter-driven unit utilises R32 refrigerant, offering an efficient solution for homeowners and a straightforward installation for heating engineers. This page provides detailed specifications, operational parameters, and essential information regarding its performance, physical dimensions, and electrical requirements, serving as a comprehensive reference for installation, servicing, and compatibility assessments.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The Baxi HP40/50-7-1PHMB is an air-source, monobloc inverter heat pump, identified within Baxi's Heat Pump air/water 'inverter' product family. This unit is engineered for domestic heating applications, providing a nominal capacity of 8.4 kW at an ambient temperature of 7°C. Its operational capability extends to maintaining a capacity of 7.67 kW at 0°C, with a robust minimum outdoor operating temperature of -25°C. The system is capable of achieving a maximum flow temperature of 55°C, suitable for various heating system designs.
Efficiency metrics for the HP40/50-7-1PHMB include a Seasonal Coefficient of Performance (SCOP) of 5.03 at a 35°C flow temperature and 3.23 at a 55°C flow temperature. These figures indicate its performance across different operating conditions relevant to UK heating demands. The heat pump utilises R32 refrigerant, with a charge of 1.4 kg.
Acoustic performance is a key consideration for residential installations. The HP40/50-7-1PHMB exhibits a sound power level (LwA) of 59 dB and a sound pressure level of 48 dB when measured at 1 metre. Physical dimensions of the outdoor unit are 1388 mm in height, 1388 mm in width, and 448 mm in depth, with a total weight of 105 kg.
Electrical requirements specify operation on a 50 Hz, single-phase supply, necessitating a 25A MCB rating for circuit protection. Hydraulically, the unit operates within a maximum pressure of 3 bar and a minimum of 1.5 bar. Installation guidelines stipulate minimum clearances of 1500 mm to the front, 500 mm to the sides, 500 mm behind, and 300 mm above the unit to ensure adequate airflow and service access. This comprehensive data supports accurate system design, installation planning, and ongoing maintenance for heating professionals across the UK.
Common questions from engineers and homeowners about the Baxi HP40/50-7-1PHMB.
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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 30 April 2026.