At what distance should ventilation ducts be supported?

Rigid galvanized steel ducts should typically be supported every 1.5 to 2 meters, depending on the duct's diameter and weight. If support points are too sparse, the ducts may eventually sag under their own weight or the added weight of insulation. Near fittings such as T-pieces or bends, and close to the heat recovery unit itself, additional brackets must be installed to ensure stability.

Why do duct clamps need a rubber lining?

The rubber lining acts as a sound insulator, preventing the heat recovery motor and airflow vibrations from transferring into the building structures. Using rigid metal clamps without rubber allows even the slightest system tremor to travel through the threaded rod straight into the concrete ceiling or wooden beams. This creates a low-frequency hum in the rooms that no silencer can eliminate.

Can a heat recovery unit be mounted directly to a plasterboard wall?

No, a heat recovery unit is too heavy (often weighing 40-80 kg) and generates vibrations, so it must be secured to the load-bearing wall structure or mounted using special frames. Plasterboard cannot withstand the dynamic load. Always hang the unit on a concrete or masonry wall using reliable anchor bolts. If it is a stud wall, a reinforced wooden or metal shield must be built into the mounting location before finishing.

Mounting Hardware

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Noise Silencers

Reliable mounting hardware is the backbone of a stable, safe, and quiet ventilation system. High-quality brackets with anti-vibration rubber linings absorb equipment tremors, ensuring you hear only fresh air in your home, not technical humming through the walls. Discover professional profiles, clamps, and threaded rods for long-lasting installation.

Rattling Ducts and Wall-Transmitted Noise

One of the most common mistakes in new homes is mounting a high-quality heat recovery unit on cheap, rigid brackets. Even if the unit itself runs quietly, the motor's micro-vibrations travel through rigid metal connections straight into the building's ceiling or walls. This structural noise turns your bedroom into a constant background of low-frequency humming.

Furthermore, weak mounting hardware compromises the integrity of the entire system. If ducts sag or bend due to improper spacing between brackets, stress builds up at the joints. Over time, sealing tapes peel off, airtightness is lost, and warm air is wasted before it ever reaches your rooms.

Acoustic Comfort and Peace of Mind for Decades

Professional mounting hardware creates an acoustic barrier between the ventilation system and your home's structures. By using clamps with thick EPDM rubber linings and special anti-vibration mounts, vibrations are absorbed before they can reach the threaded rod or the wall. The result is profound silence in your rooms, even when the unit operates at maximum capacity.

Reliable fixation guarantees long-term system durability with zero maintenance. A properly planned support network keeps galvanized steel ducts perfectly straight. This means airflow moves without obstruction, the system operates at peak efficiency, and you can forget about defects for decades.

Silence starts with rubber – a professional anti-vibration lining in a bracket can reduce structural noise by up to 15 dB(A), protecting your sleep from technical hums.

Safely suspending heavy components requires engineering precision. When selecting components, you must evaluate not just the price of the parts, but their ability to withstand long-term static and dynamic loads:

Anti-Vibration Properties - avoid bare metal clamps in residential spaces. Choose brackets that feature an integrated elastic rubber profile. This plays a crucial role in isolating sound between the duct and the building structure.
Maximum Load Capacity (kg) - to hang a heavy ventilation unit or silencers, use C-shaped mounting profiles (Strut channels) and adequately thick threaded rods (M8 or M10). Always check the manufacturer's specified load limits for clamps.
Corrosion Resistance - even if the system is installed in a warm room, choose at least electro-galvanized steel parts. If mounting components outdoors or in a humid environment, hot-dip galvanized or stainless steel is mandatory.
Anchoring Type - when fixing to a concrete ceiling, use steel drop-in anchors to ensure maximum pull-out resistance. Fastening to hollow core slabs or wood requires special toggle bolts or wood screws with wide washers.

Individual Brackets or Profile Systems?

The choice depends on the complexity of your layout. For individual, straight pipes, standard round clamps with a threaded rod work perfectly. However, if multiple parallel duct runs cross the utility room, or a heavy unit is being suspended, mounting profiles (consoles) allow you to build a sturdy frame where several elements can be flexibly positioned at once.

A Safe Installation Process

Meticulous installation work prevents future system deformations and failures. Follow a strict order of operations and distance planning:

Distance Planning - mark the suspension points on the ceiling. As a standard, brackets are installed every 1.5 to 2 meters. Additional support points are mandatory before and after bends, T-branches, or heavy components.
Anchoring and Rod Preparation - drill the holes, hammer in the steel anchors, and screw in the threaded rods cut to the required length. Before hanging the ducts, ensure all anchors are firmly set in the ceiling.
Leveling and Securing - once the duct is placed in the clamp, use a spirit level to ensure an even slope (if required). Tighten the clamp screws so the rubber lining firmly hugs the metal, but do not overtighten and crush the rubber's elasticity.

Long-Term Maintenance and Reliability

A high-quality mounting system is entirely maintenance-free. Once the system is installed and hidden behind finishes, you will never need to access it again. However, it is critical that the materials used during installation respect the rules of insulation – the insulation under the clamps must not be compressed, otherwise condensation may start to form in those spots. Secure mounting is your long-term investment in household peace.

Mounting Hardware

Often bought together with

Rattling Ducts and Wall-Transmitted Noise

Acoustic Comfort and Peace of Mind for Decades

Individual Brackets or Profile Systems?

A Safe Installation Process

Long-Term Maintenance and Reliability

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Why Mounting Hardware Determines the Silence and Durability of Your Ventilation System

How to Choose the Right Mounting Hardware for Your Ventilation System?