Performance boundary: dimensions, free area and velocities below are preliminary selection envelopes, not AMCA-certified ratings. Air performance, leakage, water penetration, wind-driven rain or acoustic claims require valid test data for the exact model and size.
Product families
Weather and drainable louvers
Outdoor intake or discharge products selected from face area, free area, pressure loss and rain exposure.
Control and isolation dampers
Parallel- or opposed-blade assemblies with manual or motorized actuation selected for system pressure and control duty.
Grilles and air terminals
Supply, return and extract terminals coordinated with velocity, throw, pressure loss, sound and architectural finish.
Required project data
| Required field | Project definition |
|---|---|
| Opening and installation | Clear width × height, wall/duct depth, flange, fixing and multi-section limits |
| Air duty | Airflow, intake/exhaust direction, face velocity and allowable pressure loss |
| Weather exposure | Indoor/outdoor, rain, wind-driven rain, sand, insects and drainage path |
| Construction | Galvanized steel, aluminium or stainless steel; blade/frame thickness and finish |
| Damper operation | Parallel/opposed blade, manual/electric/pneumatic actuator, fail position and torque |
| Performance evidence | Free-area calculation, pressure loss, leakage, water penetration and acoustic data as applicable |
| Accessories | Bird screen, insect screen, filter, sill, flange, actuator, end switch and access |
| Compliance status | No AMCA or leakage/water rating claim without exact valid model evidence |
Preliminary manufacturing and selection envelope
| Model | Product | Nominal depth | Single-section size envelope | Free-area basis | Initial velocity basis |
|---|---|---|---|---|---|
| RF-LV-100 | Weather louver | 100 mm | 300×300 to 2,000×2,000 mm | 40–55% calculated | 1.5–2.5 m/s intake basis |
| RF-DL-150 | Drainable louver | 150 mm | 300×300 to 2,000×2,000 mm | 45–60% calculated | 1.5–2.5 m/s intake basis |
| RF-CD-100 | Control damper | 100 / 150 mm | 200×200 to 2,000×2,000 mm | Project geometry | 2–10 m/s duct basis |
| RF-AT-50 | Grille / air terminal | 50–100 mm | 100×100 to 1,200×600 mm | Project geometry | 1.5–4 m/s face basis |
Sizing and submittal calculations
| Item | Equation / required output | Engineering note |
|---|---|---|
| Face area | Aface = width × height | Use clear project opening dimensions. |
| Face velocity | Vface = Q / (3,600 × Aface) | Q in m³/h and area in m². |
| Free area | Afree = measured/calculated open passage area | Do not infer pressure loss from percentage alone. |
| Free-area velocity | Vfree = Q / (3,600 × Afree) | Use for tested water-penetration comparison only with valid product data. |
| Pressure loss | ΔP from exact model/size test data or approved calculation | Screen, blade shape and installation affect resistance. |
| Damper torque | Actuator torque ≥ blade/linkage torque × approved safety factor | Confirm system pressure, seals, orientation and fail position. |
| Sectioning | Define mullions, joint details, drainage and structural support | Large openings require coordinated fabrication drawings. |
Engineering release workflow
- Confirm the opening schedule, airflow and installation exposure.
- Select the product type, blade geometry, materials and accessories.
- Calculate face/free-area velocities and preliminary pressure loss.
- Verify actuator, leakage, rain, acoustic or structural evidence where required.
- Issue coordinated dimensions, finish, accessories and claim status in the submittal.