Baxi
The Baxi HP55_UK_Assure_HP55-8-1-PHMB is an 8kW air source heat pump with an A+++ ErP rating and a 49dB sound power level, identified by GC number 7898260.
The Baxi HP55_UK_Assure_HP55-8-1-PHMB is an 8kW air source heat pump designed for domestic heating applications. Identified by GC number 7898260, this unit is part of the Assure HP55 product family. According to manufacturer ErP data, it achieves an A+++ energy rating for both 35°C and 55°C flow temperatures. This technical guide provides engineers and homeowners with essential performance data, sound emissions, and identification details for installation and maintenance planning.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The Baxi HP55_UK_Assure_HP55-8-1-PHMB represents a specific configuration within the Baxi Assure HP55 product family, tailored for the UK domestic market. As an air source heat pump, it serves as a primary heat generator, extracting thermal energy from the ambient air to provide space heating and domestic hot water. The unit is officially catalogued under GC number 7898260, a critical identifier for engineers sourcing parts or registering the installation with regulatory bodies.
Technical documentation indicates a nominal capacity of 8kW under average climate conditions. This output level is typically suitable for medium-sized UK dwellings, though a full MCS-compliant heat loss calculation is required to ensure the appliance meets the property's peak demand. Efficiency is a core metric for this model; the ErP energy label confirms an A+++ rating for both low-temperature (35°C) and medium-temperature (55°C) applications. This high efficiency suggests the unit can maintain low operational costs when paired with correctly sized emitters, such as underfloor heating or oversized radiators.
The maximum flow temperature is capped at 55°C. While this is sufficient for many modern heating systems and domestic hot water requirements, installers must account for this limit during the design phase, particularly when retrofitting into older properties with existing radiator circuits. The unit operates with a sound power level of 49 dB(LWA). This relatively low acoustic output is a significant factor in meeting Permitted Development rights under MCS-020, as it reduces the required separation distance from neighbouring habitable rooms.
As the extraction confidence for this specific model is currently low, data is primarily derived from ErP energy labels and manufacturer marketing classifications. Engineers should verify specific hydraulic requirements, such as minimum flow rates and the necessity of a buffer tank or volumiser, against the full installation manual. The HP55_UK_Assure_HP55-8-1-PHMB is designed to integrate into the wider Baxi ecosystem, often utilised in new-build developments where high ErP ratings contribute to SAP compliance. Proper commissioning, including weather compensation setup, is essential to achieve the theoretical seasonal performance factors implied by its A+++ rating.
Common questions from engineers and homeowners about the Baxi HP55-8-1-PHMB.
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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.