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…is a combination grille, register box, control damper, and optional flow regulator(s). This unique combination provides up to four different control schemes without the need for expensive pneumatic, electronic, or…

…four different control schemes without the need for expensive pneumatic, electronic, or DDC control systems. By replacing static grilles in large central exhaust systems, the ZRT-FR-1 model provides on-off control…

…schemes without the need for expensive pneumatic, electronic, or DDC control systems. The ZRT-SDIL-1 model provides on-off control for on-demand ventilation. This allows central fan downsizing and promotes energy savings…

…to four different control schemes without the need for expensive pneumatic, electronic, or DDC control systems. By replacing static grilles in large central continuous supply systems, the ZRT-FRS-1 model provides…

…is a combination grille, register box, control damper, and optional flow regulator(s). This unique combination provides up to four different control schemes without the need for expensive pneumatic, electronic, or…

…is a combination grille, register box, control damper, and optional flow regulator(s). This unique combination provides up to four different control schemes without the need for expensive pneumatic, electronic, or…

…up to four different control schemes without the need for expensive pneumatic, electronic, or DDC control systems. To ensure the proper calibration of the damper assembly, do not exceed 1.0…

…up to four different control schemes without the need for expensive pneumatic, electronic, or DDC control systems. To ensure the proper calibration of the damper assembly, do not exceed 1.0…

…is a combination grille, register box, control damper, and optional flow regulator(s). This unique combination provides up to four different control schemes without the need for expensive pneumatic, electronic, or…