Access Doors

A "must-have" accessory

The regular cleaning of ventilation ducts has become an undisputed necessity as it helps maintaining both the air quality and the efficiency of the distribution network.

The large number of dimensions as well as the various available versions of the METU access doors facilitate access to a large variety of ducts (simple, insulated high-temperature, double-wall, fire-rated, made of PVC, PE, PP or PPs).

New Access Doors
Fire-rated Access Doors FR-S and FR-1 (1100°C / 120 Min.)
Liquid-tight Access Doors RD-FD and RRD-FD

Access Doors for Rectangular Ducts

Access Doors RD
For rectangular, non-insulated air ducts
Largest selection of sizes and types


Access Doors RD-FD
NEW: Liquid-tight access doors !


GX Access Doors
Alternative to the RD access doors
Low installation height and easier positioning during the installation
Only 3 sizes available


Plastic Access Doors KRD
For rectangular ducts made of PVC, PE, PP and PPs

Access Doors for Insulated Rectangular Ducts

Insulated Access Doors IRD-2, -3, -4
For insulated rectangular ducts (insulation thickness between ≈ 20 and ≈ 55 mm)


Insulated Access Doors IRD-3DE
For externally insulated rectangular air ducts (minimum insulation thickness 25 - 60 mm)


Insulated Access Door IRD-AB
Alternative to the IRD-3DE. For outside insulated ducts and double-wall ducts.
Cheaper, but only available in three sizes.


Insulated Acess Door IRD-3PL
For inside and outside insulated rectangular air ducts.
Simple solution, but with lower insulating properties than other insulated access doors.


Insulated Access Doors IRD-DW1
For double-wall rectangular ducts and
ventilation ducts made of aluminum-coated rigid foam.
Insulation thickness from approx. 10 mm to 60 mm (maximum insulation thicknesses must be observed)


Insulated Access Doors IRD-DW2
Solution for double-wall rectangular air ducts with thicker insulations (starting at approx. 42 mm)


Fire Resistant Access Door FR-S
120 minutes (EN 1363-1) 
To be installed on rectangular ducts sprayed
with a fire-retardant coating or fire-resistant mortar.


Access Doors for Round Ducts

Access Doors RRD
For circular ducts 
Available in different materials, sizes and versions
NEW: liquid-tight access doors (RRD-FD) !


Plastic Access Doors KRRD
For round ducts made of PVC, PE, PP and PPs


Access Doors RRD-FD
NEW: liquid-tight access doors !


Access Doors for Insulated Round Ducts

Insulated Access Door IRRD-3PL
For outside insulated round ducts
Simple solution, but with lower insulating properties than other IRRD insulated access doors


Insulated Access Doors IRRD-3DE
For outside insulated round air ducts.
Minimum insulation thicknesses to be observed


Insulated Access Doors IRRD-DW1
For double-wall round ducts with thin insulation.
Max. Insulation thicknesses are to be considered.


Insulated Access Doors IRRD-DW2
Solution for double-wall round ducts with very thick insulation.


Fire Resistant Access Door FR-1
120 minutes (EN 1363-1) 
To be installed on round ducts sprayed
with a fire-retardant coating or fire-resistant mortar.


Special Versions and Accessories

Retaining Cable

Lockable Access Doors
More security through controlled access



Access Doors Overview

Access Door Questionnaire
If you need assistance please fill out
this questionnaire.




Outperform the highest class D (DIN EN 12237)
or class ATC 2 (EN 16798-3)

Operating Pressures


Opening Dimensions


Knobs Design



Kitchen Ventilation




Access Doors for Fittings

Outdoor Exposure


Electrostatic Discharge


Problematic Case: Access Doors with Frames; supposedly insulated



Packing Possibilities