Easily maintained air curtain Comfort air curtains Model DoorFlow

Comfort air curtains Comfortable and inviting Outside doors of shops and public buildings are often left open for commercial reasons. An open door arouses the curiosity and makes the building more accessible to people, which contributes to a customer-friendly approach. When the door is open, incoming colder outside air will disturb the indoor climate. For customers as well as for staff, draught feels very unpleasant. Besides, costly warm indoor air can freely escape to the outside. The comfort air curtain, model DoorFlow, warms the cold air before entering the building and prevents the escape...

High efficiency air curtain Application The DoorFlow is highly suitable for use in: • shops • supermarkets • public buildings With open doors the difference between the indoor and outdoor temperatures leads to an exchange of air, with precious heat being lost to the outside and colder outside air flowing in. Installing a DoorFlow air curtain above the open entrance prevents heat loss to the outside and heats up the cold outdoor air to the desired, comfortable room temperature. All Biddle air curtains come with the patented rectifier technology. This technology ensures that the turbulent air flow...

Additional applications Air curtains and revolving doors: the perfect combination A revolving door in the entrance is an architectural step towards creating a comfortable climate in a shop or a public building. But every time a customer goes through a revolving door, cold air comes inside. Customers and staff find the draught very unpleasant. Besides, heating the cold external air costs additional energy. Tourniquet air curtain The tourniquet air curtain prevents draughts, which keeps the interior at a pleasant temperature. For this reason Biddle has developed a solution specifically for revolving...

Climate separation during warm outdoor temperatures Air curtains are generally used to separate a pleasant warm indoor climate from the cold outdoor climate. An air curtain is also very effective in the reverse situation, where the cool indoor climate has to be separated from the hot outdoor (summer) climate. The ambient model from the DoorFlow range (without heating element) is a suitable solution for this. It is also possible to switch off the heating of an heated air curtain. On hot days, an unheated air curtain can achieve a cool indoor climate. Unheated air curtains can also provide the...

Thermostatic control The water heated units of the DoorFlow come as a standard with an air side speed controller and can be extended with a water side room temperature controller. Electrically heated units come as a standard with a room temperature controller. 1. Air side control The air side control allows the user to regulate the speed of the air curtain using the controller. Three fan speeds are available: low - medium - high. 2. Water side room temperature control The control panel can be easily fixed on the wall. Electrically heated units come standard with room temperature control. With...

Many possibilities Type code DF S-100-W-F DF = DoorFlow Type S = Small (200 - 250 cm) M = Medium (250 - 300 cm) L = Large (300 - 350 cm) Unit length (cm) 100-150-200-250 Coil type W2 = Water heating (2-row) W4 = Water heating (4-row) E = Electric heating A = Ambient (no heating) Model F = Free-hanging R = Recessed C = Cassette T = Tourniquet The type coding is put together by selecting 1 of all parts. The comfort air curtain, model DoorFlow, is available in three types: 1. S (Small): for installation heights of 200 to 250 cm. 2. M (Medium): for installation heights of 250 to 300 cm. 3. L (Large):...

Technical data Basic data max. door width installation height room temperature air volume heating capacity sound pressure level at 3 m air volume heating capacity sound pressure level at 3 m General selection data Installation data 1 The 2-row heating coil (W2) is suitable for the water ranges 80/60 °C and 90/70 °C and the 4-row heating Basic data weight model F model R model C electrical supply max. heating capacity2 max. water volume2 max. water pressure loss2 - incl. three-way valve - excl. valve max. power motors max. current motors (1 phase) max. power consumption heating max. current consumption...

Technical data Basic data max. door width installation height room temperature air volume heating capacity sound pressure level at 3 m Basic data air volume heating capacity sound pressure level at 3 m General selection data Installation data weight model F model R model C electrical supply max. heating capacity2 max. water volume2 max. water pressure loss2 - incl. three-way valve - excl. valve max. power motors max. current motors (1 phase) max. power consumption heating max. current consumption incl. fans (3 phases) Installation data max. door width installation height room temperature General...

Technical data Basic data max. door width installation height room temperature air volume heating capacity sound pressure level at 3 m air volume heating capacity sound pressure level at 3 m General selection data Installation data 1 The 2-row heating coil (W2) is suitable for the water ranges 80/60 °C and 90/70 °C and the 4-row heating Basic data weight model F model R model C electrical supply max. heating capacity2 max. water volume2 max. water pressure loss2 - incl. three-way valve - excl. valve max. power motors max. current motors (1 phase) max. power consumption heating max. current consumption...

Explanation of technical data Coil type mw = water volume [l/h] Q = heating capacity [kW] ρw = density of water at 90 °C (= 0.984) [kg/l] Cpw = specific heat of water (=4.18) [kJ/kg°C] ∆Tw = temperature difference water [°C] Heating capacity The maximum heating capacity stated in the tables on page 8, 9 and 10 are based on a water range of 80/60 °C regarding the 2-row heating coil and 60/40 °C regarding the 4-row heating coil. If different water or room temperatures are used, the max. heating capacity may be multiplied by the factors from the table alongside. Water volume If different values...