The LA 6TU high-efficiency air-to-water heat pump stands out thanks to its high coefficients of performance (COPs), even at low heat outputs. This makes it perfect for nearly zero energy buildings. High performance factors are achieved with an electronically controlled expansion valve and a slow-running owl's wing EC fan - and high performance factors translate into low operating costs. The special casing design makes installation close to walls possible, thus saving space in the garden. The heat pump can be combined with a Hydro-tower with an integrated domestic hot water cylinder for quick and easy installation.