AXO-HEPA

PART 1 – GENERAL

1.1 SUMMARY

A. Ceiling terminal unit combining high-induction swirl air distribution and HEPA filtration: EffectiV AXO-HEPA, as scheduled. Unit shall filter air and diffuse the filtered air with high induction mixing for efficient contaminant removal.

B. Provide a terminal unit consisting of:

1. Removable high-induction swirl diffuser face for access and filter replacement.
2. Integrated HEPA filter, classification H14 (EN 1822).
3. Plenum box with circular side duct connection and pressure intake to control filter pressure loss.

C. Air distribution characteristics:

1. Individually adjustable high induction mixing vanes, adjustable from horizontal swirl to directional or downward.
2. High tolerance to airflow and temperature variations; stable air stream with approximately 60% flow variation.
3. Suitable for ceilings 8.5 to 13 ft (2.6 to 4.0 m) and temperature differential up to 22°F (12°C), unless otherwise indicated.

1.2 SUBMITTALS

A. Product Data: Manufacturer’s data for scheduled model size(s), including:

1. Recommended min/max airflow and nominal airflow.
2. Pressure loss (terminal unit) and diffuser-generated NC.
3. Throw data (with and without ceiling effect, where published).
4. Induction ratio data (where published).
5. HEPA filter performance data (efficiency, classification, pressure drop limits, humidity limit).
6. Construction description including removable face, pressure intake, and airflow straighteners.

B. Shop Drawings: Show scheduled model designation, overall dimensions, neck size, circular side duct connection size/location, service access for face removal and filter change, pressure intake location, finish, vane color, and coordination clearances above ceiling.

C. Airflow Prediction Report (Required): Provide manufacturer-generated room airflow prediction report for each diffuser type and unique room condition using manufacturer performance data and recognized correction methods. Report shall include:

1. 3D room layout with diffuser placement.
2. Predicted airflow visualization views: plan (top), section (side), elevation (front).
3. Throw distances for terminal velocities of 150, 100, 60, 50, 40, 30, and 20 fpm.
4. Pressure loss at scheduled airflow.
5. Diffuser-generated NC.
6. Perceived NC at room center (5 ft height), 63–8000 Hz octave bands; include assumptions used.

D. Filter Test Documentation (Required): Provide EN 1822 test and label documentation for each supplied filter; provide test report delivered with each product.

E. Verified CFD Validation (When Indicated): Provide EffectiV Verified CFD validation and summary report for spaces indicated and/or when operation is outside published selection limits.

1.3 SUBSTITUTIONS

A. Substitutions per Division 01.

B. Proposed equals shall provide a line-by-line compliance matrix including all Part 1 deliverables, including filter classification/testing documentation, airflow prediction report deliverables, and confirmation of pressure intake and removable face access.

PART 2 – PRODUCTS

2.1 BASIS OF DESIGN

A. EffectiV AXO-HEPA high induction swirl diffuser terminal unit with HEPA filter.

2.2 SCHEDULED MODELS AND AIRFLOW (AS SCHEDULED)

A. Provide one of the following models (recommended airflow values for optimal performance; may be exceeded in VAV applications where permitted by design):

1. AXO-HEPA 330: 71–106 cfm (nominal 88 cfm).
2. AXO-HEPA 482: 188–282 cfm (nominal 235 cfm).
3. AXO-HEPA 538: 235–353 cfm (nominal 294 cfm).
4. AXO-HEPA 635: 306–459 cfm (nominal 382 cfm).

2.3 HEPA FILTER REQUIREMENTS

A. Provide H14 HEPA filter, model RH14, as part of the terminal unit.

B. Filter performance:

1. MPPS effectiveness: 99.995%.
2. Classification: EN 1822:2009 H14.
3. Final pressure drop: 1.606 in.w.g.
4. Maximum relative humidity: 90%.

C. Filter construction:

1. Extruded aluminum frame with epoxy finish.
2. Protective aluminum grille on both sides.
3. Mini-pleated micro fiberglass media with spacers (continuous hot fusion).
4. Sealed with elastomer polyurethane to eliminate risk of bypass.

2.4 TERMINAL UNIT CONSTRUCTION

A. Plenum box: White polystyrene plenum with circular side duct connection and pressure intake to control filter pressure loss.

B. Diffuser face:

1. Removable face panel for easy access and filter change.
2. Face material/finish (as scheduled): anodized aluminum or galvanized steel powder coated white.
3. Induction vane color: black or white, as scheduled.

C. Induction vanes:

1. Individually adjustable high induction mixing vanes.
2. Provide airflow straighteners on the back of the vanes to ensure consistent discharge and swirl pattern.

2.5 FINISH

A. Face finish: White factory finish as scheduled; include TGIC-free powder coat where powder coat is specified.

B. Induction vanes: black or white as scheduled.

PART 3 – EXECUTION

3.1 INSTALLATION

A. Install terminal units level and square in ceiling system; provide required clearances for face removal and filter replacement.

B. Connect duct to circular side duct connection; ensure pressure intake is unobstructed and accessible as required.

3.2 ADJUSTING

A. Balance to scheduled airflow.

B. Set vane positions (horizontal swirl, directional, or downward) as required by the design intent.

3.3 FILTER REPLACEMENT AND COMMISSIONING

A. Replace filters using removable face access; do not damage sealing surfaces.

B. Verify filter installation integrity to prevent bypass; document final installed condition per submittals.