Bay Area Test Equipment Inc is one of the leading walk-in chambers manufacturers and suppliers, welcome to buy and wholesale cheap and best drive-in chambers from us. BTH Series Walk-in Chambers BTH Series Walk-in/drive-in chambers are designed to test comparatively large test specimen. These chambers are assembled and integrated on-site with options of remote refrigeration units, conditioning units and control panels. Either built on-site using interlocking or in a complete welded structure is available.