Technical Verification Required

Ventilation components require precise sizing. Please verify that this MILD300 model matches your system’s diameter and connection type (e.g., Big End vs Small End) before ordering.

Key Specs:
Category: Dampers – Plastic & Metal
Type: Metal Motorised In Line Damper (230VAC) SESE

Maximizing Airflow Efficiency

Whether you are installing a bathroom extractor, a range hood, or a full balanced pressure heat recovery system, the physics of airflow remains the same: air hates friction. Every component in your system, from the ducting to the joiners and grilles, introduces “Static Pressure” (resistance).

Using high-quality components like the Motorized In-Line Damper Galv 300dia is crucial for minimizing this resistance. Cheaper, poorly molded fittings or rough-bore ducting can create turbulence, which reduces the extraction rate of your fan. This means your fan has to work harder, creating more noise and using more electricity, while moving less damp air out of your home.

Pro Tip: When connecting ducting, always stretch flexible ducting taut. A saggy duct creates immense resistance. Use rigid joiners and bends where possible to maintain a smooth internal profile for the air to glide over.

Building Code G4 & Healthy Homes Standards

In New Zealand, ventilation isn’t just about comfort; it’s a compliance issue. Under Building Code Clause G4, spaces where people live must have adequate ventilation to prevent mold and moisture buildup. The Healthy Homes Standards further enforce this for rental properties, requiring specific extraction capacities for kitchens and bathrooms.

Ensuring you use the correct diameter components (like 150mm for kitchens) is vital. Using a restrictive component in a 150mm system effectively chokes it down, potentially causing it to fail a flow test. Smooth Air products are designed to meet AS/NZS 4254 standards, giving you peace of mind that your installation is up to code.

Material Selection: PVC vs. Galvanized Steel

Choosing between plastic (PVC) and metal components depends on the application.

• PVC (Plastic): Ideal for residential use, especially in bathroom and laundry extracts. It is lightweight, immune to corrosion (rust), and has a very smooth internal surface for excellent airflow. It helps reduce vibration noise transfer.
• Galvanized Steel: The standard for commercial HVAC and high-temperature applications. It offers superior structural rigidity and fire resistance. If your system passes through fire-rated walls, steel components (often combined with fire dampers) are non-negotiable.

This specific item, the Motorized In-Line Damper Galv 300dia, utilizes materials selected for durability and performance in its intended class.

Logistics & Warranty

Secure Shipping: We utilize a “Direct-to-Site” 3PL model. Your order for the MILD300 is routed from the nearest strategic distribution hub (Auckland, Wellington, or Christchurch) directly to your address. This reduces road miles and handling, ensuring your parts arrive in pristine condition.

NZ Warranty: As a 100% NZ-owned business, all purchases are covered by the Consumer Guarantees Act. Whether you are a trade professional or a DIY homeowner, you are protected against manufacturing defects.

Professional HVAC Supply: Motorized In-Line Damper Galv 300dia

You are viewing the Motorized In-Line Damper Galv 300dia (SKU: MILD300). A critical component within our Dampers – Plastic & Metal range, designed specifically for New Zealand’s residential and commercial ventilation requirements. Sourced directly from the Smooth Air supply chain for NZ Depot.

Technical Specifications & Features

About the Metal Motorised In Line Damper (230VAC) SESE Series

SE = Small End.
Fitted with nylon brush bearings
Fitted with leak resistant Blade edge seal
24V AC available on request
Damper motors feature one wire control facility
Most units can be assembled from ex-stock components (subject to prior sale)
Spring Return Motors also available, please contact us for a quote

Understanding NZ HVAC Compliance

When selecting ventilation equipment for New Zealand homes and businesses, compliance with AS/NZS 4254 and UL 181 standards is non-negotiable. The Motorized In-Line Damper Galv 300dia is engineered to meet these rigorous safety and performance benchmarks.

Why R-Value Matters

For insulated ducting components, the R-Value (Thermal Resistance) is critical. A higher R-Value ensures that the air travelling through your system maintains its temperature—whether hot or cold—from the unit to the outlet. This reduces energy load on your heat pump or AC unit, lowering electricity bills and increasing system longevity. This product offers an R-Value of (if applicable), ensuring thermal efficiency.

Fire Safety & Materials

Safety is paramount in ceiling spaces and wall cavities. Smooth Air components utilize fire-resistant materials, often featuring a metallized Mylar outer jacket and encapsulated steel wire cores. This construction not only prevents fire spread but also maintains the structural integrity of the ducting under high pressure.

Why NZ DEPOT for HVAC?

🌱 Sustainable Supply Chain Initiative

At NZ DEPOT, we are modernizing the New Zealand trade supply chain. Traditional retail involves shipping products from a manufacturer to a central warehouse, then to a retail showroom, and finally to the customer. This “multi-hop” model adds unnecessary carbon emissions and cost.

By utilizing a Direct-to-Site 3PL model, we eliminate the “Showroom Hop.” Your order for the MILD300 is routed from the nearest strategic distribution hub (Auckland, Wellington, or Christchurch) directly to your address. This logistical efficiency reduces road miles, lowers our carbon footprint, and allows us to pass significant savings on to you.

🛡️ Warranty & Consumer Protection