120×50mm PVC flat rectangular ceiling top ventilation duct system

This product is the 120×50 PVC flat rectangular ventilation duct system — a complete modular rigid low-profile duct kit including straight flat ducts, square-to-round adapters, elbows, tees, plugs and mounting clamps, manufactured in Zhejiang Jinhua, China, for residential exhaust & fresh air HVAC systems.

Core Pain Points It Solves

1. Tight installation space limitation: Ultra-flat 120×50 profile fits shallow ceiling voids, narrow wall gaps, cabinet backspaces where standard round ducts cannot route.
2. Duct shape mismatch: Resolves incompatibility between rectangular flat duct trunking and circular fan/range hood outlets via square-to-round transition fittings (Φ100/110/125/150).
3. Complex routing demands: 45°/90° horizontal & wall-penetrating elbows enable bending around beams, pipes, and wall obstacles without airflow blockage.
4. Air leakage & poor ventilation efficiency: Interlocking snap-fit joints create sealed duct runs to prevent air loss, maintain smooth airflow and reduce system noise.
5. Multi-branch air distribution: Square tees support splitting single duct lines to multiple exhaust/fresh air outlets in kitchens, bathrooms and balconies.
6. Renovation non-destructive fitting: Lightweight rigid PVC avoids major wall/ceiling demolition for retrofit ventilation upgrades.

Product Information

Product Features

1. Ultra-low-profile flat 120×50 design, maximizes concealed installation space in shallow cavities
2. Complete modular accessory ecosystem: all transition, bend, split and sealing fittings match the 120×50 trunk
3. Multi-size square-to-round converters (Φ100–Φ150) compatible with all standard domestic exhaust fans and range hoods
4. Rigid smooth PVC inner wall cuts airflow friction, improves ventilation efficiency and lowers operational noise
5. Moisture & oil fume resistant PVC material, no rust, ideal for humid kitchen/bathroom long-term use
6. Snap-lock push-fit assembly, no professional welding/gluing required for fast DIY installation
7. Multiple elbow styles (horizontal / wall-penetrating) for flexible routing around beams, cabinets and structural barriers
8. Blank plug accessory allows unused duct branches to be sealed without airflow waste
9. Lightweight construction, reduces ceiling load and transport/labor costs
10. Uniform factory molding, tight interlocking joints to eliminate air leakage in full duct runs
11. High customer verified durability, consistent 100% short-term positive user feedback on build quality
12. Cost-effective entry pricing starting at $1.3 for small fittings, scalable for small DIY and large renovation projects

Using Scenarios

1. Kitchen Range Hood Retrofit Renovation: Homeowners upgrading old kitchen exhaust systems; wall/ceiling cavities are too shallow for standard 100/150mm round ducts, requiring flat 120×50 trunk plus square-to-round Φ100 adapter to connect rectangular duct to circular hood outlet.
2. Small Apartment Bathroom Ventilation: Compact studio bathrooms with narrow wall gaps; install flat duct with 90° wall elbow to run exhaust duct behind vanity cabinets without breaking drywall.
3. Whole-House Fresh Air System Installation: HVAC contractors designing concealed ceiling fresh air supply runs; use square tees to split single main duct to multiple bedroom air outlets, low flat profile fits thin ceiling voids.
4. Balcony Laundry Dryer Moisture Exhaust: Households with enclosed balconies; route flat duct along balcony ceiling with 45° horizontal bends to vent dryer humid air outdoors, avoiding bulky round duct obstruction.
5. Low-Ceiling Basement Smoke & Ventilation Upgrade: Basement remodels with minimal overhead clearance; rigid flat PVC duct runs concealed under low ceiling joists, corrosion-resistant for damp basement air.

FAQ