Viessmann Vitocal 300-G ie Propane Heat Pump Launched
Viessmann has introduced the Vitocal 300-G intelligent energy (ie), an inverter-driven brine-to-water heat pump intended for indoor installation in new and existing homes. The unit runs on propane (R290) refrigerant and includes an integrated active safety system for refrigerant management. The company positions it for both new builds and heating-system retrofits, partly because it can deliver flow temperatures up to 70 C.
Three capacity versions
The heat pump is offered in three versions, labeled 06, 12 and 16, with modulating heating ranges of 1.8–9.3 kW, 3.2–12.2 kW and 3.2–15.6 kW respectively. Nominal heating output at B0/W35 is 3.25 kW, 5.26 kW and 6.16 kW, with COPs of 4.7, 5.0 and 5.0. All three share dimensions of 1,018 × 600 × 680 mm; the smallest weighs 167 kg and the two larger models 185 kg each. The floor-standing units need roughly 0.5 m2 of installation space.
Efficiency and controls
Viessmann states a seasonal coefficient of performance of up to 5.5 in low-temperature applications, seasonal space-heating efficiency up to 212% and an A+++ rating. The smallest model has a sound power level of 34 dB(A) under EU ErP test conditions. Up to four units can be cascaded for a combined heating capacity of up to 64 kW, managed by a single universal controller. The One Base Intelligence platform allows integration with PV systems, battery storage, EV charging equipment and compatible third-party devices, and supports weather-based optimization and dynamic electricity tariffs. The ViCare app handles remote monitoring and control.
PVT and cooling options
The system can be connected to photovoltaic-thermal collectors, which can act as an alternative heat source to conventional geothermal boreholes while also generating electricity. Existing boreholes can be reused when replacing older ground-source heat pumps. An optional natural cooling function uses ground temperature to cool indoors in summer; Viessmann says it can lower indoor temperatures by up to 3 C.
Availability and undisclosed details
The Vitocal 300-G ie is available to order, with deliveries starting Nov. 30, 2026. A compact version with an integrated domestic hot water tank is expected in April 2027. Pricing, warranty terms and certifications were not disclosed in the article.
Specifications
Source: pv magazine. Image: Viessmann.