| Function | Units | Value |
| Hot Water | ||
| Maximum Output | kW | 31 |
| Pressure Loss | kPa | 18 |
| Capacity | L/min | 9 |
| Temperature Range | °C | 35 to 60 |
| Heating | ||
| Maximum Output | kW | 42 |
| Differential Pressure Controller Setpoint | kPa | 20 |
| Kvs Value | m³ / Hr | 2.5 |
| District Heating Circuit | ||
| Maximum Flow Temperature | °C | 95 |
| Pressure Class | Bar | PN10 |
| Minimum Flow Temperature | °C | 70 |
| Maximum Permissible Pressure | kPa | 200 |
| Minimum Differential Pressure | kPa | 70 |
| Maximum Pressure Loss | kPa | <25 |
| Connections | ||
| District Heating Flow | G ¾" F | |
| District Heating Return | G ¾" F | |
| Cold Water Supply | G ¾" F | |
| Hot Water | G ¾" F | |
| Heating Flow | G ¾" F | |
| Heating Return | G ¾" F | |
| Heat Meter (Flow Mounted) | G ¾” Swivel Nut (x2) L=110mm | |
| Heat Meter Return Temperature Sensor | M10 x 1 – into G ½” Adaptor | |
| Dimensions | ||
| Height | mm | 485 |
| Width | mm | 585 |
| Depth | mm | 265 |
| Weight incl. Pre-plumbing Bracket | kg | 9.5 |
| Weight excl. Pre-plumbing Bracket | kg | 9 |
(1) The DHW flow capacity depends on the supply temperature, permissible return temperature and pressure of the distribution network. By means of a flow restrictor in the Mains cold water fitting on the plumbing bracket, the maximum DHW flow rate can be tuned to these external factors. (2) The HIU should be mounted on a standard plumbing bracket (Supplied with the Digi Unit).