FLAT DUCT "T ITEM": A "T-piece" can be placed between the start and end points of the ventilation system, for connecting flat ducts at right angles or at right angles to each other. The rectangular cross-section ventilation ducts and the corresponding fittings make it easier to cover/hide the flexible system ki. It has a smaller "thickness" size compared to the elements of the equivalent "traditional" round cross-section pipe system, so it can also be placed in narrow places (e.g. above false ceilings, behind floor beams) without reducing (narrowing) the useful cross-section. The constrictions used in the ventilation system can result in greater pressure loss and higher noise from air flow. If the device to be installed has a connection with a circular cross-section, the so-called to one of the "transformer" adapters, which of course can also be found among the air technology accessories, within all size categories. Characteristics of Gonal Fit&Go system elements: An air-technical element equipped with a special rubber seal on the connection surfaces, which can be used to create a system classified in the highest air-tightness class ("D" air-tightness class!). The advantages of this:- Fast and precise fitting;- Can be installed without tools;- Fixed, displacement-proof rubber seal at the factory;- The position of the fittings can be changed / fine-tuned afterwards without deteriorating the sealing efficiency; - It does not require the use of other solutions that improve/increase the airtightness;- A leak-free system can be created by using them;- Lower noise level resulting from air flow;- High energy efficiency. Related products:- ventilation duct, 55x220mm / 1.0m- ventilation duct, 55x220mm / 1.5m- ventilation duct, 55x220mm / 3.0m