Mechanical Draft Design & Modulating Fan / Damper Systems
Closed-loop draft control with SMDS modulating dampers, ADF dampers, and RSV / TDF draft fans listed to UL 378.
Overview
Advanced mechanical draft and flue pressure management systems engineered to continuously maintain, monitor, and control precise draft profiles for commercial boilers, water heaters, and high-temperature chimneys. High-performance termination fans (Model RSV) and inline mechanical draft fans (Model TDF) ensure compliance with appliance manufacturer specifications under all atmospheric and firing conditions. For precise volumetric airflow and over-draft mitigation, the platform incorporates the SMDS Modulating Damper Control System paired with heavy-duty Model ADF draft dampers. Fully integrated draft suites such as the CASV and CASI packages are listed to UL 378, combining mechanical fans and modulating dampers into an intelligent closed-loop control network that reacts to real-time transducer pressure monitoring.
Featured Models · Manufacturers
Listings · UL 378
Specification Highlights
What this system delivers.
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Targeted Design Configurations
High-velocity vertical termination (RSV) and compact inline (TDF) mechanical draft fans.
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Precision Volumetric Modulation
SMDS modulating damper control with Model ADF dampers stabilizes over-draft and isolates standby cycles.
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Certified Safety Standards
Complete system packages fully listed to UL 378 for integrated draft equipment and control safety.
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Dynamic Pressure Regulation
CASV / CASI closed-loop control continuously modulates fan output and damper position from real-time pressure data.
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