Halton DFP – Modular ceiling diffuser

Overview

• Horizontal supply air pattern. Suitable for extract air and extract air with filter
• Modular construction with 3 interchangeable face options for 600 x 600 and 675 x 675 mm modular ceilings, offering different appearance and performance characteristics
• Removable face panel for cleaning the diffuser and ductwork
• Duct connection through a Halton PFP balancing plenum, available with different duct connection sizes and plenum heights (160 mm to 315 mm connection)
• Circular duct connection with integrated gasket
• Balancing plenum with airflow measurement function

Options and accessoires

• Suitable for installation in a Fineline ceiling
• Plenum with horizontal or vertical duct connection
• Halton PFP plenum available with a G3 filter
• MSM airflow measurement and balancing module for supply air

Dimensions

Halton DFP only

Left: Standard T-bar ceiling and Right: Fineline ceiling

Halton DFP installed with Halton PFP plenum: plenum with horizontal or vertical duct connection

Structure and materials

Features and options

Operating principle

Halton DFP/P

Air is supplied into the room via the ceiling diffuser face panel, creating a ceiling effect.
The air can be supplied in four different directions. The maximum temperature difference between supply air and room air depends on the number of directions used:

• 8 °C for 3 and 4 directions6 °C for 1 and 2 directions
• DFP/P can also be used for extract air and can be fitted with a filter.

The DFP/P can also be used for extraction and may include a filter.

Halton DFP-N

Air is supplied horizontally and vertically through the diffuser face panel.
The air pattern can be directed radially by manually rotating each nozzle.
The direction of the air jet does not affect the pressure drop or airflow rate.
The recommended maximum temperature difference between supply air and room air is -10 °C.

Halton DFP-J

The radial swirling horizontal air jet is supplied into the room through the diffuser’s profiled swirl vanes.
The recommended maximum temperature difference between supply air and room air is -12 °C.
The supply air velocity is reduced due to high induction.

Halton PFP Plenum

The Halton PFP balancing plenum distributes airflow by reducing air velocity.
Connection diameters 160, 200, 250 and 315 are available.
The circular duct connection is equipped with a rubber gasket.
Air is evenly distributed into the diffuser to ensure proper operation.
The airflow rate can be adjusted using the detachable MSM measurement and balancing module.

Installation

Opening dimensions

Commissioning

To enable airflow adjustment and measurement, connect the diffuser to a plenum equipped with an MSM module. The supply airflow rate is determined using the MSM airflow measurement and balancing module. Open the diffuser face panel and pass the tubes and control spindle through it. Close the diffuser face panel. Measure the pressure difference with a differential pressure manometer. The corresponding airflow rate is calculated using the formula below

Where:

Adjust the airflow rate by rotating the MSM control spindle until the required value is reached. Lock the damper in this position with the knob. Open the diffuser face panel, return the tubes and control spindle into the plenum, and close the face panel.

k-factor for installations with different safety distances (D = duct diameter):

Maintenance

Halton DFP-N

• Gently pull the diffuser face panel downwards and let it rotate on its hinges.
• Remove each nozzle by pressing the two locking tabs and pushing from the rear.
• Clean the nozzles and face panel with a damp cloth.
• Push the nozzles back into place on the face panel.
• Reinstall the face panel.

Halton DFP-J and Halton DFP-P

• Open the diffuser face panel and clean the parts with a damp cloth.
• Reinstall the face panel by pushing it until it clicks into place.

Halton PFP Plenum

• Remove the measurement and balancing module by gently pulling the rod. Do not pull the control spindle or measurement tubes.
• Clean the parts with a damp cloth; do not immerse them in water.
• Reinstall the measurement and balancing module by pushing the rod until it reaches the stop.
• Reinstall the face panel by pushing it until it clicks into place.

Specification

Halton DFP-J

• Halton DFP-J ceiling supply diffuser with a four-way swirl air pattern.
• High-induction diffuser that enables airflow variation without altering the air jet pattern.
• Face panel made of steel and coated with white epoxy-polyester paint (RAL 9003) as standard.
• Removable face panel for access to the plenum or airflow adjustment and measurement.

Option: Halton PFP-J Plenum

• Halton PFP-J connection plenum with horizontal or vertical circular duct connection and a sealing gasket.
• Plenum made of galvanised steel. 15 mm mineral wool insulation with Euroclass A2-s1,d0 fire classification.
• MSM airflow measurement and balancing module

Halton DFP-N

• Halton DFP-N ceiling supply diffuser with adjustable nozzles in the face panel.
• The nozzles have a double slot on the front face to improve diffuser induction. They can be individually adjusted through 360°.
• The air pattern can be directional in 1, 2, 3 or 4 directions, or swirling.
• The nozzle configuration can be modified without special tools to accommodate changes in the building layout, such as partitioning.
• The diffuser provides a swirling air pattern and allows significant airflow variation without changing the air jet profile.
• The face panel is made of steel and coated with white epoxy-polyester paint (RAL 9003) as standard. The nozzles are made of plastic.
• The removable face panel provides access to the plenum, airflow adjustment, and measurement system.

Option: Halton PFP-N Plenum

• Halton PFP-N connection plenum with horizontal or vertical circular duct connection and a sealing gasket.
• Plenum made of galvanised steel. 15 mm mineral wool insulation with Euroclass A2-s1,d0 fire classification.
• MSM airflow measurement and balancing module.

Halton DFP-P

• Halton DFP-P ceiling supply diffuser with a square perforated sheet-metal face panel for suspended ceiling installation.
• Supply air pattern with Coanda effect and high induction for rapid reduction of supply-air velocity and supply-to-room temperature difference.
• The airflow can be directed in 1, 2, 3 or 4 directions.
• The diffuser can also be used for extract air.
• The face panel is made of galvanised steel and coated with standard white epoxy-polyester paint (RAL 9003).
• Hinged face panel for access to the inside of the diffuser and the airflow measurement and adjustment system.

Option: Halton PFP-P Plenum

• Halton PFP-P connection plenum with horizontal or vertical circular duct connection and a sealing gasket.
• Plenum made of galvanised steel. 15 mm mineral wool insulation with Euroclass A2-s1,d0 fire classification.
• MSM airflow measurement and balancing module.

Order code

DFP- F-C-M-D; DB-DP-IO-NC-CO-ZT

Order code example

DFP-P-S-S-600; DB=3, DP=ST, IO=FL, NC=SW, CO=W, ZT=N