DOORFLOW2 Air Curtains
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A SOLUTION FOR EVERY SITUATION The latest development in a long line of market leading air curtains, the DoorFlow2 has been developed to be not just of minimalist design but also to minimise maintenance, bringing a continuous and consistent long lasting level of performance and maximize energy savings. The Doorflow2 warms the cold air before it enters the building and prevents the escape of warm air through the open door. By installing the DoorFlow2 above the door it increases energy efficiency, prevents draught problems and proves that an open door and a comfortable indoor climate can...

HOW IT WORKS As with all air curtains from Biddle the DoorFlow2 uses Biddle’s proven, patented rectifier to supply conditioned air at low speed with minimum turbulence, ensuring the air stream reaches the floor and doesn’t escape to the outside. Comfort within the entrance area is therefore enhanced without any energy wastage. APPLICATIONS Available in a variety of paint finishes, the DoorFlow2 has a minimalist style, being designed to look good in all types of entrance environment – from fashionable boutiques to schools and colleges. Modular in nature, the units can be joined together to...

INSTALLATION AND MAINTENANCE Carefully developed to minimise maintenance, a purpose designed coil/heater battery reduces the build-up of dust and debris between the coil fins to such an extent that filters are no longer necessary. DoorFlow2 stands out as a greener choice, by not only offering minimal maintenance but also by providing a continuous and consistent long-lasting level of performance, thanks to its filter-free design. The DoorFlow2 air curtain is installed by means of threaded rods and is delivered as standard ready to plug in, including a built-in three-way valve. This makes the...

O WALL CONTROLLER The new control panel will ensure air curtain performance is optimised whilst minimizing energy usage. Connecting the control panel to DOORFLOW2 couldn't be easier-just plug one end of the cable into the air curtain and the other end into the controller. In 'Auto' mode control panel will automatically adjust the air curtain's heat output to optimize air curtain performance, control the space at these selected set point temperature (range=18-25°C) and minimise energy usage. In 'Manual' mode control panel simply provides the air curtain with either half heat or full heat....

OlCORRECT CHOICE OF UNIT ESSENTIAL FOR PERFORMANCE For optimal functioning of the DoorFlow2, selecting the right type of unit(s) is essential. If an air curtain has been selected well it is able to protect the entire width and height of the door opening. The unit must have sufficient heating capacity to be able to bring incoming cold air to a comfortable temperature. 1. INSTALLATION HEIGHT AND WIDTH Based on the installation height (from floor to the bottom of the unit) and the door width, it is easy to select the right air curtain (see selection table). By installing multiple units next to...

C ONTROLS SCHEMATIC Unit On / Off C IRCULAR DOORWAYS When an air curtain is to be used in conjunction with revolving doors or any other form of circular doorway we are able to use a variant of the recessed model installed either adjacent to or directly above the door. Given certain key dimensions we manufacture a bespoke discharge grille to fit perfectly with the curvature of the door, and ensure optimum climate separation around the circular doorway.

O CONTROL & OPERATION By adjusting heat output and fan speed the control panel ensures air curtain performance is optimised whilst minimising energy usage. It is connected to the unit by a low voltage data cable with a RJ4/4 plug on both ends. Multiple units are also connected in this way. Cables are available in a variety of lengths. o ELECTRICAL CONNECTIONS LPHW units are connected to the mains supply by a 2 metre cable. The 3-phase mains supply cable used with electric heated units enters the air curtain via a cable gland on top of the unit and is then connected to a terminal strip...

DOORFLOW | TECHNICAL DETAILS | 9

The heating capacities of water units with the two row heating coil are based on a water range of 80/60°C with an air inlet temperature of 20°C, and with the four row heating coil on a water range of 60/40°C with an air inlet temperature of 20°C. With different water and air inlet temperatures, the heating capacity should be multiplied by the factors in the table below. WATER VOLUME With water and room temperatures other than the values represented in the tables, the water volume can be roughly calculated using the formula below. The heating capacity should first be recalculated based on...

Acoustical "hard" ceiling + 2 - 3 dB(A) SOUND The sound data is based on the direct field, in a situation with an open door and a sound absorbing ceiling. The sound data for different situations can be determined by adding the adjacent values to the table values. Deviating distances and several units next to each other can be calculated with the table below. Data from the 1m unit, measured at a distance of 3m, is the basic assumption. The factors apply to all types of air curtains. Total unit length (m) 2 2,5

Electrical supply Max. Input current (1 phase) Max. Fan power Max. Specific fan power Water flow rate Water pressure drop with 3-port valve Water pressure drop with 2-port valve Water range Weight F / R / C_ Air inlet temperature Speed Discharge air temperature Air volume Heating capacity Sound pressure level at 3m Unit length DF2 S-150-W2 Electrical supply Max. Input current (1 phase) Max. Fan power Max. Specific fan power Water flow rate Water pressure drop with 3-port valve Water pressure drop with 2-port valve Water range Weight F / R / C Air inlet temperature Speed Discharge air...

Electrical supply Max. Input current (1 phase) Max. Fan power Max. Specific fan power Water flow rate Water pressure drop with 3-port valve Water pressure drop with 2-port valve Water range Weight F / R / C_ Air inlet temperature Speed Discharge air temperature Air volume Heating capacity Sound pressure level at 3m Unit length DF2 M-100-W2 Electrical supply Max. Input current (1 phase) Max. Fan power Max. Specific fan power Water flow rate Water pressure drop with 3-port valve Water pressure drop with 2-port valve Water range Weight F / R / C Air inlet temperature Speed Discharge air...