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Round duct and fittings

TÜV Rheinland Monitoring + Testing  -  Round ventilation duct and fittings
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TÜV Rheinland Monitoring + Testing - Round ventilation duct and fittings


Certification body: TÜV Rheinland Group

Application: Designed for use in ventilation systems in apartment buildings, industrial plants and public utility objects including hospitals.

Products: Round ventilation ducts and fittings, access doors, round roof elements

Technical Approval -
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Technical Approval - "D" class leaktightness according to Eurovent - round elements with seals


Certification body: SITAC Swedish Institute for Technical Approval in Construction

Application: Designed for use in ventilation systems in apartment buildings, industrial plants and public utility objects including hospitals.

Products: Alnor round Spiral duct system

Alnor round spiral ducts and ductwork elements are manufactured according to Swedish Technical Approval no. 0103/07 issued by SP Certifiering.

 *reproduction, copying, photographing, scanning, digitizing document for marketing purposes is prohibited. The model document is published exclusively for customers who have purchased the products listed in the document.

Declaration of conformity -  round ducts and fittings - galvanized
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Declaration of conformity - round ducts and fittings - galvanized


Producer: ALNOR Systemy Wentylacji Sp. z o.o.

Reference document: EN 1506:2007 Ventilation for buildings - Sheet metal air ducts and fittings with circular cross-section – Dimensions
EN 12237:2003 Ventilation for buildings - Ductwork – Strength and leakage of circular sheet metal ducts

Products: Galvanized round ducts and fittings

Declaration of conformity -  round ducts and fittings - stainless steel sheet
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Declaration of conformity - round ducts and fittings - stainless steel sheet


Producer: ALNOR Systemy Wentylacji Sp. z o.o.

Reference document: EN 1506:2007 Ventilation for buildings - Sheet metal air ducts and fittings with circular cross-section – Dimensions
EN 12237:2003 Ventilation for buildings - Ductwork – Strength and leakage of circular sheet metal ducts
EN 10088-2:2007 Stainless steel - Part 2: Technical delivery conditions for sheet/plate and strip for general purposes

Products:  Stainless steel sheet round cross-section ducts and fittings

Declaration of conformity -  aluminium round ducts and fittings
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Declaration of conformity - aluminium round ducts and fittings


Producer: ALNOR Systemy Wentylacji Sp. z o.o.

Reference document: EN 1506:2007 Ventilation for buildings - Sheet metal air ducts and fittings with circular cross-section – Dimensions
EN 12237:2003 Ventilation for buildings - Ductwork – Strength and leakage of circular sheet metal ducts

Products: Aluminium round ducts and fittings

Declaration of conformity -  round ducts and fittings with gasket
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Declaration of conformity - round ducts and fittings with gasket


Producer: ALNOR Systemy Wentylacji Sp. z o.o.

Reference document: EN 1506:2007 Ventilation for buildings - Sheet metal air ducts and fittings with circular cross-section – Dimensions
EN 12237:2003 Ventilation for buildings - Ductwork – Strength and leakage of circular sheet metal ducts

Products:  Round ducts and fittings with gasket

Hygienic certificate - Round ducts and fittings -  galvanized
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Hygienic certificate - Round ducts and fittings - galvanized


Certification body: National Institute of Hygiene

Application: Designed for use in ventilation and air-condition systems in apartment buildings, industrial plants and public utility objects including hospitals.

Products: All ducts and fittings produced of galvanized sheet

 *reproduction, copying, photographing, scanning, digitizing document for marketing purposes is prohibited. The model document is published exclusively for customers who have purchased the products listed in the document.

Hygienic certificate - Round ducts and fittings -  stainless steel
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Hygienic certificate - Round ducts and fittings - stainless steel


Certification body: National Institute of Hygiene

Application: Designed for use in ventilation and air-condition systems in apartment buildings, industrial plants and public utility objects including hospitals.

Products: All ducts and fittings produced of stainless steel

 *reproduction, copying, photographing, scanning, digitizing document for marketing purposes is prohibited. The model document is published exclusively for customers who have purchased the products listed in the document.

Report - Testing of air tightness of a circular duct system
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Report - Testing of air tightness of a circular duct system


Certification body: Accredited Testing Laboratory - SP Technical Research Institute of Sweden

Test object: Circular duct system - sheet thickness 0.5 mm, 0.6 mm, 0.7 mm, 1.2 mm.

Reference document: standard EN 12237:2003 ”Ventilation for buildings – Ductwork – Strength and leakage of circular sheet metal ducts”​

 *reproduction, copying, photographing, scanning, digitizing document for marketing purposes is prohibited. The model document is published exclusively for customers who have purchased the products listed in the document.

Hygienic certificate - Round ducts and fittings - aluminium
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Hygienic certificate - Round ducts and fittings - aluminium


Certification body: National Institute of Hygiene

Application: Designed for use in ventilation and air-condition systems in apartment buildings, industrial plants and public utility objects including hospitals.

Products: All ducts and fittings produced of aluminum

 *reproduction, copying, photographing, scanning, digitizing document for marketing purposes is prohibited. The model document is published exclusively for customers who have purchased the products listed in the document.

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