BWC

PART 1 – GENERAL

1.1 SUMMARY

A. Section includes supply and installation of adjustable round ventilation valves for air supply or air exhaust applications.

B. Product: BWC-N adjustable core ventilation valve, suitable for residential and light commercial applications including washrooms, houses, apartments, offices, schools, and hospitals.

C. Adjustment: airflow shall be adjustable by rotating the central core clockwise or counter- clockwise.

D. Mounting: valve shall be suitable for mounting in walls or on ductwork, as scheduled.

E. Airtightness: valve shall be provided with a gasket to minimize air leakage at the mounting interface.

F. Quality: steel construction; higher quality than plastic valves.

1.2 SUBMITTALS

A. Product Data: manufacturer’s data for scheduled model and size, including airflow range, dimensions, materials, and finish.

B. Shop Drawings: indicate model designation, neck diameter, mounting location(s) (wall or duct), and installation details.

C. Balancing/Commissioning Notes: indicate target airflow and corresponding core position/setting procedure.

1.3 QUALITY ASSURANCE

A. Manufacturer Qualifications: single manufacturer responsible for valves and scheduled accessories to ensure fit, finish, and consistent performance.

1.4 SUBSTITUTIONS

A. Substitutions per Division 01.

B. Proposed equals shall provide documentation demonstrating steel construction, adjustable core operation, gasketed interface, and scheduled airflow range coverage.

PART 2 – PRODUCTS

2.1 BASIS OF DESIGN

A. EffectiV BWC Series steel adjustable round ventilation valves, model BWC-N.

2.2 MATERIALS AND CONSTRUCTION

A. Construction: galvanized steel valve body suitable for architectural exposed installation.

B. Adjustment: central core shall rotate for airflow adjustment; provide smooth, repeatable adjustment.

C. Gasket: factory-supplied gasket to reduce air leakage at the mounting interface.

D. Finish: factory powder coated, white RAL 9016.

2.3 SIZES AND AIRFLOW (AS SCHEDULED)

A. Provide neck diameter(s) as scheduled with airflow capability within the following ranges:

1. 4 in (100 mm): 6 to 88 cfm
2. 5 in (125 mm): 12 to 129 cfm
3. 6 in (150 mm): 12 to 147 cfm
4. 8 in (200 mm): 18 to 259 cfm

PART 3 – EXECUTION

3.1 EXAMINATION

A. Verify field conditions, duct/wall opening size, and mounting surface condition prior to installation.

3.2 INSTALLATION

A. Install valve in wall or on ductwork as scheduled; ensure gasket is properly seated to minimize leakage.

B. Install valve level and centered; ensure core rotation remains accessible for balancing.

3.3 ADJUSTING AND CLEANING

A. Adjust airflow by rotating the central core to achieve scheduled airflow.

B. Clean exposed surfaces; repair or replace damaged finishes.