Hitachi
The Hitachi 240353 is a compact heat pump featuring a 49°C maximum flow temperature, 7 bar operating pressure, and a 13kg unit weight with a 1-year parts and labour warranty.
The Hitachi 240353 is a compact heating solution designed for specific domestic applications. According to the manufacturer datasheet, this unit operates with a maximum flow temperature of 49°C and a maximum operating pressure of 7 bar. Weighing 13kg with a width of 292mm, it is significantly smaller than standard monobloc units. This page provides technical specifications, sound emission data, and warranty information for heating engineers and homeowners researching the 240353 model.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The Hitachi 240353 represents a specialized entry in the heat pump market, characterized by its compact physical footprint and specific operating parameters. According to technical documentation, the unit measures 292mm in width and 229mm in depth, making it one of the most space-efficient models in its class. With a dry weight of 13kg, the appliance is designed for installations where structural load and spatial constraints are primary considerations. Performance data indicates a maximum flow temperature of 49°C. This temperature threshold suggests the unit is best suited for low-temperature heating systems or specific secondary circuits rather than high-temperature radiator retrofits. The maximum operating pressure is rated at 7 bar, providing a robust ceiling for standard domestic hydraulic configurations. Engineers should note that while the documentation classifies this under the Acetal Husky 307 product family, its application within UK heating systems requires careful hydraulic balancing to maintain efficiency. Acoustic performance is a critical factor for planning and neighbor proximity. The 240353 produces a sound power level (Lwa) of 68 dB, with a recorded sound pressure of 81.5 dB at a one-meter distance. These levels are higher than many modern residential monoblocs, so installers must conduct a thorough noise assessment, particularly if the unit is sited near habitable room windows or property boundaries. The absence of a dedicated quiet mode in the specifications means physical acoustic barriers or strategic placement may be necessary to meet MCS-020 planning standards. The unit is supplied with a standard 1-year warranty covering both parts and labour. This coverage is contingent on correct installation and commissioning according to the manufacturer's guidelines. Unlike many high-capacity domestic heat pumps that offer 5-to-7-year extended terms, the 240353 maintains a focused 12-month protection period. For engineers, the 240353 is part of a wider variant range including the 240-349 and 240-352 models. While the core mechanical specifications remain consistent across the 240-353 series, variations typically relate to the inclusion of specific accessory packages or hose configurations. When integrating this unit into a wider building management system, the lack of native OpenTherm or Modbus support in the primary datasheet suggests that external relays or proprietary Hitachi interfaces may be required for advanced weather compensation.
Common questions from engineers and homeowners about the Hitachi 240-362.
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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.