The Sunco Duct 4ZANT-40-25 is a CNC-manufactured insulated distribution box with one 400mm inlet and four 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. 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 ANT body fits through most larger return-air grille openings before its fittings are installed.
Each 250mm zone motor fits through the opening for a 250mm round diffuser. Tape the flexible duct to the motor below the ceiling, pass it into the roof space and clip it directly into the ANT body.
Features
Four independently controlled zones
1 × 400mm clip-in inlet spigot
4 × 250mm clip-in zone motors
Zone-motor cables included
Graphene foam seal on every clip-in connection
CNC-cut, precision-mitred PIR construction
Fittings install after the body is positioned
Less taping and assembly in confined roof spaces
Specifications
| Specification | Details |
|---|
| Product Code | 4ZANT-40-25 |
| Zones | Four independently controlled |
| Body | 21mm foil-faced PIR ductboard |
| Body Size | 440 H to apex × 580 W × 420 D mm |
| Thermal Conductivity | 0.022 W/m·K |
| Calculated Material R-Value | R0.95 m²·K/W |
| Inlet | 1 × 400mm clip-in spigot |
| Outlets | 4 × 250mm clip-in zone motors |
| Typical Airflow* | 450–600 L/s |
| Typical Balanced Outlet Airflow* | 112–150 L/s each |
| Maximum Recommended Airflow | 1,000 L/s total |
| Maximum Balanced Outlet Airflow | 250 L/s each |
| Zone-Motor Cables | Included |
| Connection Seals | Graphene foam |
4Z = four zones · ANT = insulated box body · 40 = 400mm inlet · 25 = 250mm outlets
*Indicative airflow assumes two balanced ANT boxes connected to separate supply-air paths, each using up to 6m of fully extended 400mm flexible duct. Outlet figures assume all four zones are open and connected through up to 6m of fully extended 250mm flexible duct.
Actual airflow depends on fan capacity, available static pressure, duct compression, bends, terminal resistance, balancing and commissioning. Thermal figures are calculated material values; finished thermal performance depends on verified material properties, sealing and installation.
