The quietest mufflers in the Netherlands

Driven by high energy prices and climate goals, more and more homeowners are choosing to make their homes more sustainable. Cavity wall insulation, roof insulation and triple glazing prevent energy (heat) from being lost to the outside and provide the perfect circumstance for a heat pump. "Anyone who insulates thoroughly must also ventilate adequately," stresses Henry Kale, Account Manager at Panflex. "Fortunately, more and more residents are aware of this. Ventilation systems with heat recovery are selling like hot cakes. A good development, where unfortunately a new problem is just around the corner: noise pollution."

"Our Building Code requires a maximum installation noise level of 30 dB(A) or lower. Since a WTW system produces between 55 and 60 dB(a) on average, you have to filter out quite a bit of noise," Kale said. "To avoid noise pollution, it is important that the system be properly engineered and installed. Not only pipe diameters, air volumes and air velocities must be correct, but the installation must also be free of obstructions. After all, resistance also creates noise. Silencers on the unit and valves can then provide the additional damping."

Fast and good

Motors of WTW ventilation systems produce low-frequency tones from 125 to 500 Herz, Kale knows. "These are 'long waves,' which you want to remove from the airflow as quickly and properly as possible. To make the 'insertion loss' possible, acoustic ventilation hoses or dampers of at least 1 meter are required. A size that our products meet exactly. In fact, we have the best and quietest dampers available in the market!"

At the source muted

The acoustically insulated and flexible ventilation hoses are part of Panflex's WTW Package, which also includes two thermally insulated ventilation hoses, eight stainless steel hose clamps and a roll of Alutape. "Our WTW Package is available for all common diameters (125 to 200 mm), consists sec of A-brand products and is standardly in stock at well-known technical wholesalers," Kale said. "The acoustic ventilation hoses are already taped off at one end, allowing them to be connected directly to the WTW unit. This attenuates as much noise as possible already at the source. Moreover, because we use an itch-free Ecose insulation wool, a finer assembly and the very best sound attenuation are guaranteed. In the most common diameters and with a hose length of 1 meter we can reduce noise by 30 to 33 dB(A)! This makes us unique in the Netherlands." For those who want to reduce crosstalk in addition to insertion loss, Panflex also offers an extensive range of crosstalk attenuators.