DW144 Access Door Installation
Legislations:
BESA DW144 – Sheet Metal Ductwork specifies that an access panel is to be provided adjacent to items of in-line equipment that require either regular servicing or intermittent access. The opening will be sized to provide hand and/or arm access only and the system designer shall specify the size and location of panels where larger openings are required.
It shall be standard practice to provide access panels for the inspection and servicing of plant and equipment as listed below. Table 20 that follows, summarizes these requirements under the heading of those panels to be fitted by the ductwork contractor.
Table 20: Location of access panels for inspection/*servicing and/or internal cleanliness* |
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| In-Line Equipment | Location | Party Responsible for provision of suitable access panel | |
| Ductwork Contractor | Specialist Cleaning Contractor | ||
| Control Dampers | Both Sides | Up-Stream Panel | Down-Stream Panel |
| Fire Dampers | Both Sides | To suit damper maintenance | Opposite Side |
| Heating/Cooling/Re-Claim Coils | Both Sides | Panels on Both Sides | |
| Attenuators (Rectangular) | Both Sides | Up-Stream Panel | Down-Stream Panel |
| Attenuators (Circular) | Both Sides | Up-Stream Panel | Down-Stream Panel |
| Filter Sections | Both Sides | Up-Stream Panel | Down-Stream Panel |
| Air Turning Vanes | Both Sides | Up-Stream Panel | Down-Stream Panel |
| Changes of Direction | Both Sides | – | One panel to suit |
| In-Duct Fans/Devices | Both Sides | Up-Stream Panel | Down-Stream Panel |
| Inlet/Exhaust Louvres | Both Sides | One panel to suit | |
| Â Â Â Â Intermediate Cleaning Panels | To suit frequency specified in TR/19 and DW/172 | ||
BS EN 9999 specifies that access panels installed should be of a construction that has at least the same fire resistance as the element they are fitted into.
Access Doors
Standard DW144 Spiral access panel
Standard DW144 Rectangle access panel
DW144 access door with saddle
DW144 access door with intumescent coating (With post certification)
At Hydro-X Fire, not only can we install sufficient access into your ductwork systems, but we can also assist with the following fire damper services:
Fire damper installation & replacement
These come in many forms from small perforation to fire damper units located completely outside of the fire break.
This should be carried out by law at least on a 12-monthly basis.
Fusible Link Sourcing & Replacement:Â
These com in many forms and sizes and are a vital piece in the functionality of the fire damper and efficiency of the HVAC system
Your fire stopping needs to be inspected and any defects rectified to ensure the effectiveness of the fire plan and the safety of the occupants using the building
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