| Subtype | Certificate Holder | Heat Pump Type | Certification Body |
|---|---|---|---|
| HYDRABLOCK C 12, 14, 16kW | ITALTHERM S.p.A. | Outdoor Air/Water | BRE |
| HYDRABLOCK C 5, 7, 9kW | ITALTHERM S.p.A. | Outdoor Air/Water | BRE |
| HYDRABLOCK P 18, 22, 26, 30kW | ITALTHERM S.p.A. | Outdoor Air/Water | BRE |
