In March 2006, the Davies Alpine House opened, the third version of an alpine house since 1887.
Although only 16 metres (52 ft) long the apex of the roof arch extends to a height of 10 metres (33 ft) in order to allow the natural airflow of a building of this shape to aid in the all-important ventilation required for the type of plants to be housed.

The new house features a set of automatically operated blinds that prevent it overheating when the sun is too hot for the plants together with a system that blows a continuous stream of cool air over the plants.
The main design aim of the house is to allow maximum light transmission.
To this end the glass is of a special low iron type that allows 90 per cent of the ultraviolet light in sunlight to pass.
It is attached by high tension steel cables so that no light is obstructed by traditional glazing bars.

To conserve energy the cooling air is not refrigerated but is cooled by being passed through a labyrinth of pipes buried under the house at a depth where the temperature remains suitable all year round.
The house is designed so that the maximum temperature should not exceed 20 °C (68 °F).

Kew's collection of Alpine plants (defined as those that grow above the tree line in their locale – ground level at the poles rising to over 2,000 metres (6,562 feet)), extends to over 7000.
As the Alpine House can only house around 200 at a time the ones on show are regularly rotated.
In March 2006, the Davies Alpine House opened, the third version of an alpine house since 1887. Although only 16 metres (52 ft) long the apex of the roof arch extends to a height of 10 metres (33 ft) in order to allow the natural airflow of a building of this shape to aid in the all-important ventilation required for the type of plants to be housed.
The new house features a set of automatically operated blinds that prevent it overheating when the sun is too hot for the plants together with a system that blows a continuous stream of cool air over the plants. The main design aim of the house is to allow maximum light transmission. To this end the glass is of a special low iron type that allows 90 per cent of the ultraviolet light in sunlight to pass. It is attached by high tension steel cables so that no light is obstructed by traditional glazing bars.
To conserve energy the cooling air is not refrigerated but is cooled by being passed through a labyrinth of pipes buried under the house at a depth where the temperature remains suitable all year round. The house is designed so that the maximum temperature should not exceed 20 °C (68 °F).
Kew's collection of Alpine plants (defined as those that grow above the tree line in their locale – ground level at the poles rising to over 2,000 metres (6,562 feet)), extends to over 7000. As the Alpine House can only house around 200 at a time the ones on show are regularly rotated.
Kew Gardens