★★★: Upgrades to the provision of Class A control and seasonal setpoint adjustment for the preservation of "high vulnerability" woodwork, through which also allows a small risk to archival storage items such as fabrics, books, film, or photos.Īir movement is discussed under the temperature attribute, because the amount and control of air movement directly affects the level of temperature control required to maintain a comfortable and productive environment.No archival storage of fabrics, books, film, or photos is considered. ★★: Upgrades to the provision of Class B control and seasonal setpoint adjustment for the preservation of "high vulnerability" woodwork.
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