Air source heat pumps are among the few types of renewable energy heat pumps that usually absorb heat from sustainable sources. They absorb air and then pump it through a compressor in order to increase temperature before they use it to heat homes as well as small businesses.
A ductless Heat Pump / Air conditioner is a system that circulates cool/hot air in a building without ductwork. These systems are an affordable alternative to central heating, ventilating, and air conditioning (HVAC ) systems, which need a network of ducts to move air. Ductless systems are generally considered to be more efficient and easier to maintain than window air conditioners. Read more here: http://ecicomfort.com/the-many-benefits-of-ductless-split-systems/