Chicago's yearly precipitation comes in at an average of about 36 inches (910 mm), but during the summer, rain arises from short-lived hit-or-miss rain rather than actual prolonged rainfalls, and thunderstorms also occur with regularity at night. In a normal summer, temperatures exceed 90 Â°F (32 Â°C) on 23 days.
You might have heard someone mention flue spaces for rack storage, and wondered what flue spaces are and why they are needed. Flue spaces are clear lines of sight from the floor up to the ceiling within rack storage areas. There are two types of flue spaces - transverse flues and longitudinal flues.
Balanced flues. Room sealed appliances have either a balanced flue or a fanned flue. Both will include an air duct to bring combustion air to the appliance, so there is no air movement to or from the room containing the appliance.n all cases (open, balanced and fanned) the flue terminal (and air inlet) must be located according to various rules and standards to ensure that Products Of Combustion (POCs) can disperse safely and to avoid down draughts.