A smoke detection sample point , comprising: a body ; a chamber formed within the body , the chamber having a first aperture , to allow air to pass between an area to be sampled and the chamber , and a second aperture , to allow air to pass between the chamber and a space within a second enclosure , the smoke detection sample point being configured such that when a central analysis device draws a sample of air through the smoke detection sample point via a tube connectable to the second enclosure , the sampled air passes from the area to be sampled , through the first aperture , into the chamber , through the second aperture and into the space within the second enclosure ; a valve positioned within the chamber , wherein when an outflow of air is applied to the valve , the valve restricts movement of air through the chamber ; a first enclosure surrounding the body , but allowing the first aperture to pass air between the area to be sampled and the chamber and the second aperture to pass air between the chamber and the space within the second enclosure ; and the second enclosure surrounding the first enclosure and having a third aperture , the third aperture allowing the air in the space within the second enclosure to pass between the second enclosure and the tube connectable to the second enclosure . a body ; a chamber formed within the body , the chamber having a first aperture , to allow air to pass between an area to be sampled and the chamber , and a second aperture , to allow air to pass between the chamber and a space within a second enclosure , the smoke detection sample point being configured such that when a central analysis device draws a sample of air through the smoke detection sample point via a tube connectable to the second enclosure , the sampled air passes from the area to be sampled , through the first aperture , into the chamber , through the second aperture and into the space within the second enclosure ; a valve positioned within the chamber , wherein when an outflow of air is applied to the valve , the valve restricts movement of air through the chamber ; a chamber formed within the body , the chamber having a first aperture , to allow air to pass between an area to be sampled and the chamber , and a second aperture , to allow air to pass between the chamber and a space within a second enclosure , the smoke detection sample point being configured such that when a central analysis device draws a sample of air through the smoke detection sample point via a tube connectable to the second enclosure , the sampled air passes from the area to be sampled , through the first aperture , into the chamber , through the second aperture and into the space within the second enclosure ; a valve positioned within the chamber , wherein when an outflow of air is applied to the valve , the valve restricts movement of air through the chamber ; a first enclosure surrounding the body , but allowing the first aperture to pass air between the area to be sampled and the chamber and the second aperture to pass air between the chamber and the space within the second enclosure ; and the second enclosure surrounding the first enclosure and having a third aperture , the third aperture allowing the air in the space within the second enclosure to pass between the second enclosure and the tube connectable to the second enclosure . <EOS>