Viessmann
The Viessmann Vitocal 200-G is a ground source heat pump offering up to 17.2 kilowatts of output with a seasonal efficiency of 5.13 at 35 degrees Celsius and an A++ energy rating.
The Viessmann Vitocal 200-G is a ground source brine-to-water heat pump designed for domestic and light commercial heating. Available in both 230V single-phase and 400V three-phase variants, this monobloc unit delivers a nominal capacity of up to 17.2 kW at B0/W35 conditions. Featuring an integrated Vitotronic 200 control unit and R410A refrigerant, it achieves an ErP rating of A++ for both low and medium temperature applications, making it a reliable solution for UK retrofit and new-build projects.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The Viessmann Vitocal 200-G is a high-performance ground source heat pump engineered for efficiency and durability in UK residential heating systems. This monobloc unit utilizes on-off compressor technology and is available in eight distinct model variants to suit varying electrical and thermal requirements. The BWC models operate on a 400V three-phase supply, while the BWC-M models are designed for standard 230V single-phase connections.
Thermal performance is a core strength of the Vitocal 200-G range. At the B0/W35 reference condition (Brine 0°C / Water 35°C), the top-tier BWC 201.A17 model provides a nominal capacity of 17.2 kW. Efficiency remains high across the range, with a seasonal coefficient of performance (SCOP) of 5.13 at a 35°C flow temperature and 3.56 at 55°C. These figures contribute to an ErP rating of A++ for both low and medium temperature heating, ensuring compliance with modern energy standards. The unit is capable of reaching a maximum flow temperature of 60°C, making it suitable for systems with appropriately sized radiators or underfloor heating.
Internally, the Vitocal 200-G uses 1.2 kg of R410A refrigerant. The indoor unit is compact for its output, measuring 1155mm in height, 600mm in width, and 844mm in depth, with a dry weight of approximately 148 kg. For installation, engineers must observe minimum clearances, including 1500mm at the front for service access and 400mm above the unit. Hydraulic connections utilize 28mm pipework, and the system is rated for a maximum operating pressure of 3 bar.
Control is managed via the integrated Vitotronic 200 unit, which supports weather compensation and is Smart Grid ready. It is also compatible with Vitocom 100 and Vitocomfort 200 communication modules, allowing for Modbus integration and remote management through the ViCare app.
Maintenance is straightforward but requires F-gas certification due to the hermetic refrigerant circuit. Service intervals are set at 12 months. Key annual tasks include checking the refrigerant circuit for oil traces indicating leaks, verifying the pre-charge pressure of expansion vessels, and flushing the primary and secondary sides. The unit operates quietly for a ground source system, with a sound power level of 45 dB(A), minimizing acoustic impact within the utility space.
Common questions from engineers and homeowners about the Viessmann BWC 201.A08.
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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.