RES-H building obligations (Minimal solar contribution of warm sanitary water – Contribución solar minima de agua caliente sanitaria)
Updated: 06.02.2019
All new buildings or buildings undergoing major renovation in which there is demand for warm sanitary water / air conditioning of a covered swimming pool must satisfy some of this demand through solar thermal installations (CTE, HE 4)
The contribution varies between 30 and 70% of the total warm sanitary water demand of the building, depending on the demand level, the geographic position and the main heating source.
The required level of solar thermal contribution can be lowered or bypassed under the supply of warm sanitary water from other RES or CHP, under certain conditions that turn the obligation physically impossible, or as determined by the local competent authority for historic-artistic protection reasons.
Spain