The academics of water heating system reveals that it is a thermodynamic process that uses variable energy sources to heat water above its initial temperature. The increasing usage of water for cooking, cleaning , bathing, and space heating has led to different water heating systems that may confuse a layman.
Further research would however clarify that there are in general only two main types of water heating systems with many derivatives of each.
1. The instantaneous system which heats water as and when required
2. The storage system where hot water is stored or future use
The key issues that need to be kept in mind while installing a water heating system for residential and domestic purposes is:
a. The type of energy source being used
b. The volume of water requirement by the dwellers
c. Whether the water heating system is required to be a part of the central heating system
d. The number of points that require to draw water like taps, bathroom en-suit ,etc
e. The speed of hot water delivery also effects the heating system
f. Cost vs. benefit issues and location suitability and technical feasibility
The key issue remains that the water heating system has to be installed keeping in mind the individual needs and requirements and energy saving should hold primary importance. Alternate energy modes like solar, hydronic and geothermal water heating systems are becoming increasingly popular.