Building service schematics

Building service schematics

Warm water for the air/water heat exchanger in the ventilation system and domestic hot water was originally designed to be prepared by a central air/water heat pump with a 1000 litre storage tank for all units located under the staircase on the ground floor. (=System 2) But in order to avoid losing the POL 2 NOx emission credits in the Code for Sustainable Homes assessment, the new DHW and heating strategy using individual gas boilers, solar thermal (5m2) and twin coil cylinders in each dwelling. (=System 1)