The Sunco Duct 3ZANT-35-25 is a CNC-manufactured insulated distribution box with one 350mm inlet and three independently controlled 250mm motorised outlets.
Its precision-mitred body is manufactured from 21mm foil-faced PIR ductboard, delivering a calculated material rating of R0.95.
Comparable EPP products generally require approximately 40mm thickness to approach R1.0- worth checking when assessing R-value claims on thin moulded boxes. Foamed rotomoulded LLDPE fittings may require approximately 25–35mm to reach R0.4, depending on foam density, consistency and verified thermal conductivity.
While R0.4 may satisfy minimum requirements in some applications, higher thermal resistance provides greater protection against surface condensation in Queensland’s hot, humid roof spaces—helping prevent coffee-coloured ceiling stains and costly callbacks.
Pair it with our Australian made 4-Zero R1.5 Flexible Duct for a high-performance thermal installation designed for Queensland conditions.
Custom spigot and motorised zone-outlet configurations are available in 200mm, 250mm and 300mm sizes. Hit us up and we can make it happen!
Fast Clip-In Installation
The compact ANT body fits through most larger return-air grille openings before its fittings are installed.
Each 250mm outlet zone motor fits through the opening for a 250mm round diffuser. The flexible duct can be taped to the spigot below the ceiling, passed into the roof space and clipped directly into the ANT body.
Features
- Three independently controlled zones
- 1 × 350mm clip-in inlet spigot
- 3 × 250mm clip-in zone motors
- Zone-motor cables included
- Graphene foam seal on every clip-in connection
- CNC-cut, precision-mitred PIR construction
- Compact roof-space installation
- Less taping and assembly in confined spaces
- Custom spigot and motorised outlet configurations available in 200mm, 250mm and 300mm sizes
Specifications
| Specification | Details |
|---|
| Product Code | 3ZANT-35-25 |
| Zones | Three independently controlled |
| Body | 21mm foil-faced PIR ductboard |
| Body Size | 290 H × 580 W × 420 D mm |
| Thermal Conductivity | 0.022 W/m·K |
| Calculated Material R-Value | R0.95 m²·K/W |
| Inlet | 1 × 350mm clip-in spigot |
| Outlets | 3 × 250mm clip-in zone motors |
| Indicative Airflow* | 450–600 L/s |
| Indicative Balanced Outlet Airflow* | 150–200 L/s each |
| Maximum Recommended Airflow | 750 L/s total |
| Maximum Balanced Outlet Airflow | 250 L/s each |
| Zone-Motor Cables | Included |
| Connection Seals | Graphene foam |
3Z = three zones · ANT = insulated box body · 35 = 350mm inlet · 25 = 250mm outlets
