Exercise "Energy-saving methods"

Match a characteristic of an energy-efficient house on the left with the correct definition on the right.

a) hot water supply			All systems to control, regulate, monitor and operate building services automatically.
b) heat recovery			In a passive house, the heat loss through unsealed joints must be less than 0.6 times the house volume per hour.
c) preheating of fresh air			Low-energy refrigerators, stoves, freezers, lamps, washing machines, dryers, etc. are indispensable.
d) sun tube lights			Sufficient area to absorb the energy from the sun in winter and means to limit the heat gain in summer.
e) airtightness			Solar collectors or heat pumps provide the necessary energy to heat water.
f) building automation and control (BAC)			They transfer daylight via a tube, with internal mirror finish, to the inside of the building.
g) compact form and good insulation			They should have U-values not exceeding 0.80 W/m²K with solar heat-gain coefficients around 50 %.
h) southern orientation and shading device			Ducts draw fresh air through the ground exchanging heat with the ground.
i) energy-efficient window glazing and frames			The heat remaining in the exhaust air is transferred to the incoming fresh air.
j) energy-saving household appliances			All components of the exterior shell are insulated to achieve minimum U-values.