Project: [Insert Project Name]

Dear [Client / Project Team],

As part of the mechanical services design for the apartment development, we propose the use of the EcoDuct flat duct system as a direct alternative to conventional galvanised sheet metal ductwork for:

Laundry exhaust
Bathroom exhaust
Toilet exhaust

EcoDuct is a purpose-designed flat duct solution specifically developed for residential and multi-residential ventilation applications where ceiling space is limited and installation efficiency is critical.

This proposal outlines the design intent, construction advantages, and long-term performance benefits of adopting EcoDuct for this project.

1. Proposed Design Solution

We propose utilising the EcoDuct flat duct system for all wet-area exhaust runs within each apartment, connecting exhaust grilles [back to a common riser] [or discharging locally with wall mounted louvres].

The EcoDuct installation will:

Use low-profile flat duct sections to suit shallow ceiling voids typical in apartment construction.
Connect laundry, bathroom and toilet exhaust terminals to the central exhaust riser.
Be sized to meet required airflow rates in accordance with AS 1668.2 and NCC ventilation provisions
Incorporate EcoDuct factory-manufactured bends, tees, joiners and transition fittings to maintain cross-sectional integrity and control pressure drop.
Transition to circular duct at risers or fan connections where required.

The use of EcoDuct allows the project to maintain ventilation compliance while improving coordination outcomes within congested ceiling spaces.

2. Construction & Installation Benefits

2.1 Reduced Ceiling Depth & Improved Coordination

EcoDuct’s flat profile is particularly suited to apartment developments where ceiling cavities are constrained by:

Post-tension slabs and structural beams
Hydraulic pipework
Fire services
Electrical containment

By reducing duct depth, EcoDuct assists in:

Minimising bulkheads and dropped ceilings
Improving architectural outcomes
Simplifying service coordination in repetitive apartment layouts

EcoDuct does not require space wasting flanges like sheetmetal duct.

2.2 Faster Installation & Reduced On-Site Fabrication

Compared to traditional sheet metal ductwork, EcoDuct provides:

Lightweight sections that are easier to transport and handle in multi-storey buildings
Factory-formed components that reduce site cutting and fabrication
Simplified jointing systems that improve installation consistency

This can reduce labour hours, minimise defects and improve overall build efficiency.

2.3 Quality & Durability in Wet Applications

Laundry, bathroom and toilet exhaust air contains elevated moisture levels.

EcoDuct’s material properties provide:

Resistance to corrosion compared to thin galvanised sheet metal
Improved long-term durability in humid exhaust systems
Reduced risk of joint failure and air leakage over time

This supports consistent exhaust performance throughout the building lifecycle.

3. Performance & Lifecycle Considerations

3.1 Airflow & Pressure Drop

EcoDuct components are designed to maintain smooth internal airflow paths. When correctly sized and installed, the system:

Supports required design airflows
Allows accurate pressure-drop calculation
Integrates seamlessly with central exhaust fan selection

Duct sizing and performance can be verified in consultation with the EcoDuct supplier and their duct pressure calculator.

3.2 Maintenance Considerations

The EcoDuct system can be integrated into the building’s maintenance strategy by:

Providing access at risers and central plant
Ensuring appropriate grille access within apartments
Maintaining durable internal surfaces resistant to degradation

This supports long-term ventilation reliability and reduced call-backs.

4. Why EcoDuct for This Project

EcoDuct is particularly suited to this apartment development because:

Ceiling voids are limited and coordination is critical.
The building contains repetitive apartment types suited to modular duct installation.
Wet-area exhaust systems demand corrosion resistance and long-term durability.
The project team is seeking an efficient alternative to traditional sheet metal ductwork.

By nominating EcoDuct as the basis of design for wet-area exhaust ducting, the project can benefit from improved constructability without compromising compliance or performance.

5. Next Steps

To progress this proposal, we recommend:

Confirming EcoDuct as the basis of design for laundry, bathroom and toilet exhaust ductwork. Note: some areas may still require local use of sheetmetal duct ( e.g. to comply with As1668.1 through fire walls) and this will require a detailed review.
Undertaking duct sizing and pressure-drop calculations aligned with the nominated exhaust fans.
Detailed design and documentation

Contractor & Supplier Coordination

The EcoDuct supplier can provide:

Layout assistance based on apartment plans
Duct sizing confirmation and pressure-drop data
Installation guidelines and technical documentation

Information typically required includes:

Exhaust air quantities (L/s)
Sketch design
Riser locations and fan static pressure allowances

Find out More: Ecoduct – Australian Made Low Profile PVC Ducting

Design Proposal – EcoDuct Flat Duct System for Apartment Laundry, Bathroom & Toilet Exhaust

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