With a total of 154 houses in this development, it was important to get the heating and domestic hot water systems just right. D/RES, the developer and one of Ireland's leading sustainable private housebuilder, wanted to create energy efficient homes that would provide the homeowner with both comfort and reliability. Enter: Mitsubishi Electric. Mitsubishi Electric collaborated with McGuinness Mechanical , a leading mechanical engineering contractor, from the earliest stages of this project’s inception. The McGuinness design team worked closely with Mitsubishi Electric throughout the project’s lifecycle with the two collaborating on pre-site start-up meetings, on site visits, pricing, designs, heat loss calculations, selections and sizing the units.