fresh air duct bellows underfloor air supply brancher for flat duct 132x30mm

Fresh air duct bellows underfloor air supply brancher for flat duct 132x30mm close-up

Fresh air duct bellows underfloor air supply brancher for flat duct 132x30mm

Price range: $0.87 through $3.67 ( Not real price )

132*30mm Underfloor Fresh Air Flat Duct Brancher | PVC (2.0mm) / ABS (1.6/2.0mm Wall) Rigid UFAD Ventilation Pipe with Full Matching Elbow, Tee & Square-to-Round Fittings, Ultra-Thin Design for Buried Floor MVHR & Central HVAC Air Supply, Anti-Crush, Low Noise & Tool-Free Quick Installation.

Option

1m length PVC Flat Duct Size 132x30mm Wall Thickness 2mm

1m length ABS Flat Duct Size 132x30mm Wall Thickness 1.6mm

1m length ABS Flat Duct Size 132x30mm Wall Thickness 2mm

Square to Round Reducer Adapter for Φ110 Pipe to duct 132x30

External Square to Round Reducer for Φ75 pipe to duct 132x30mm

Square to Round Reducer for Φ75 pipe to duct 132x30mm

White PE Adapter Joint for Φ75 pipe to duct 132x30mm

Metal Air Distribution Box Plug for duct 132x30

ABS Air Distribution Box Plug for duct 132x30

Connector with Air Valve for duct 132x30

ABS bottom box S-type air outlet with stainless steel panel

Metal galvanized bottom box S-type air outlet with stainless steel panel

Metal galvanized bottom box round fingerprint-resistant air outlet with stainless steel panel

ABS bottom box air outlet with adjustable aluminum alloy panel

Long metal bottom box air outlet with aluminum alloy panel

Double air outlet with aluminum alloy panel and metal bottom box

ABS long strip air outlet with stainless steel panel

Clear

GTIN: 16204000809415 SKU: SC18060523 Category: Flat Duct System For Underfloor and Ceilling Top Air Distribution

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This product is a rigid flat underfloor air supply duct (132×30mm) made of PVC/ABS, the core piping component for residential & commercial UFAD (Underfloor Air Distribution) fresh air & central HVAC systems, paired with a full suite of matching elbows, tees, reducers and connectors for buried floor ventilation layout.

Core Problems It Solves

Space Limitation Conflict: Round metal ducts require thick ceiling/floor cavities; this ultra-thin 30mm height fits under concrete slabs, floor screed, narrow wall gaps without sacrificing room height.
Uneven Fresh Air Distribution: Traditional top-supply ducts create stratification; underfloor flat ducts deliver clean air low to occupied zones for displacement ventilation and balanced room airflow.
Complex Layout Installation Barriers: Single round pipes lack modular adapters; complete matching fittings support horizontal bends, wall climbing, tee splitting, round pipe conversion for any building layout.
Short Service Life & Air Leakage: Thin cheap plastic ducts crack underground; thick-wall ABS/PVC anti-crush structure + snap-fit tight joints eliminate air loss, mold and condensation risks.
High Retrofit Difficulty: Old buildings have no ceiling cavity; flat ducts can be buried under new floor layers without major structural demolition.

Product Information

Category	Detailed Specs & Information
Standard Model Size	132*30mm flat main duct
Available Materials	PVC (2.0mm wall thickness); ABS (1.6mm / 2.0mm wall thickness)
Standard Length Options	2m per piece, 20m full roll pack
Complete Matching Fittings	Straight connector, 45°/90° horizontal elbow, 45°/90° wall climbing elbow, flat tee, air damper, square-to-round reducer (Φ75/Φ100/Φ110/Φ120/Φ150/Φ160/Φ200), PE adapter, metal pipe clamp, distribution box plugs, valve connector
Primary Application	Underfloor fresh air supply, central air conditioning floor air distribution, MVHR heat recovery ventilation
Installation Method	Buried under concrete screed, embedded in narrow wall cavities, raised floor plenum layout
Duct Color	Standard white
Certified Advantages	Anti-compression, corrosion-resistant, smooth inner wall (low wind noise), tool-free quick assembly, airtight snap joints

Product Features

Ultra-thin flat profile (132×30mm) for installation in shallow floor/wall gaps, no ceiling height reduction.
Dual material selection: PVC for cost-effective standard projects; thick-wall ABS for heavy-duty buried long-term use.
Multi wall thickness choices (1.6mm / 2.0mm ABS, 2.0mm PVC) for anti-crush performance under floor concrete load.
Full modular fitting series covers all layout needs: horizontal turns, wall climbing, air splitting, round pipe conversion, airflow regulation.
Smooth seamless inner surface reduces air turbulence, lowers ventilation running noise and pressure drop for stable airflow.
Chemical & moisture resistant plastic material prevents underground mold, rot and condensation buildup.
Snap-lock quick connection design without glue or special tools, cuts installation labor time by over 40%.
Multiple length packs (1m / 2m / 20m roll) for flexible project quantity matching, no material waste.
Airtight joint structure minimizes air leakage, improving fresh air system energy efficiency.
High impact resistance, resistant to construction vibration and floor settlement deformation.

Application Scenarios

Scenario 1: New Residential Villa/Apartment Builders

Who needs it: HVAC contractors, home developers designing energy-efficient MVHR fresh air systems.

When needed: New house construction stage, when laying floor screed to embed underfloor air supply pipelines, avoiding ugly ceiling overhead ducts.

Scenario 2: Old Home HVAC Retrofit Renovators

Who needs it: Interior remodelers, homeowners upgrading ventilation without removing existing ceilings.

When needed: Old buildings with low ceiling height or solid concrete ceilings that cannot accommodate traditional round overhead ducts; flat ducts buried under new floor tiles.

Scenario 3: School & Office Commercial Building Engineers

Who needs it: Commercial HVAC designers, facility managers for open-plan offices, classrooms.

When needed: Large commercial spaces requiring uniform low-level fresh air distribution, raised access floor underfloor air distribution systems for comfort and IAQ improvement.

Scenario 4: Low-Ceiling Tiny House & Loft Conversion Contractors

Who needs it: Tiny home builders, loft renovation specialists.

When needed: Compact living spaces with limited vertical cavity space; ultra-thin 30mm duct height preserves maximum usable room height.

Scenario 5: Passive House & Green Energy Building Designers

Who needs it: Sustainable architecture firms, passive house certified installers.

When needed: Constructing energy-efficient passive houses that rely on displacement underfloor ventilation to reduce heating/cooling energy consumption and boost indoor air quality.

FAQ

Can this 132*30 flat duct be fully buried under concrete floor screed?

Yes, both ABS and PVC versions are anti-compression and moisture-proof. 2.0mm thick wall ABS is recommended for full concrete burial to resist heavy floor load and long-term settlement pressure.

Is this flat duct compatible with standard 110mm round fresh air main pipes?

Yes, we supply dedicated square-to-round Φ110 reducers in our full fitting range to seamlessly connect 132*30 flat branches with round main ventilation pipes.

What’s the difference between 1.6mm and 2.0mm wall ABS duct?

1.6mm ABS suits wall cavity shallow embedding and light-load raised floors; 2.0mm thick-wall ABS has stronger anti-crush performance for direct concrete burial under tile floors.

Do I need adhesive tape to seal duct connection joints?

The snap-on fittings form tight airtight seals, but adding our matching dark green cloth butyl tape at joints is recommended for fully leak-free underfloor buried installation.