Energy efficiency is one of the most important factors to consider when designing modern buildings. As the world becomes more aware of the climate crisis, there is an increasing demand for buildings that are less damaging to the environment. Energy efficiency also impacts the utility of a building, as it can help occupants and owners save money on energy costs in the long run. With the climate worsening and global conflicts harming supply lines, energy prices are likely to continue to rise. Water provision is a major energy sink, so there are several architectural choices that can be made to help reduce a building’s energy consumption. Gray water filters, which enable water drained from bathtubs and washing machines to be reused, are now frequently built into homes. Pipe lining can be installed that greatly reduces the amount of heat bleed from hot water piping. Geothermal heat exchange can be incorporated into a home’s design in order to provide environmentally friendly hot water. ISP thinks about every possible avenue when seeking to make a new building economically and environmentally efficient.