This is also important for internal heat gains, which in turn could contribute to an overheating risk. (elrondburrell.com)
Additionally, the hot water system runs all year round and can, therefore, contribute internal heat gains in summer. (elrondburrell.com)
It maximizes passive solar heat gains and combines them with internal heat gains from people and appliances, as well as a tiny backup system for peak heat - load demand to create a balance between heat - losses and heat - gains. (testudio.com)