OXA-FD — Fresh air mixing series

Fresh air mixing series (OXA-FD). A ceiling-mounted heating unit with an integral modulating outdoor air damper. It combines a hot water coil with controls for three operating modes: 100 % ventilation, controlled mixing, or full recirculation.

Why choose the Fresh Air series

• 100 % fresh air (ventilation). Everything comes from outside. When the outdoor temperature is already comfortable, the controls switch heating or cooling off entirely and the boiler house or chiller does no work at all.
• Mixed mode (energy-efficient blending). Outdoor air is blended with indoor air and the damper position adjusts automatically — the hall gets fresh air with minimal reheat cost.
• Full recirculation (economy heating). The outdoor damper closes and the unit simply holds the indoor setpoint, for example outside working hours.

Vortex diffuser technology. Outdoor and recirculated air are swirled hard together and mix the moment they leave the unit — an even temperature field over the full height of the space, with no stagnant pockets.

Technical data

Model	OXA-FD-I	OXA-FD-II
Fan speed, rpm	0~900	0~860
Supply air flow, m³/h	0~5400	0~8200
Voltage, V	380±5%	380±5%
Electrical power, kW	2.5	3.6
Current, A	4.4	6.3
Recommended mounting height, m	4~9	4~16
Control mode	Stepless VAV control
Sound level, dB	<60	<60

Dimensions and drawings

Dimension, mm	OXA-FD-I	OXA-FD-II
A	900	1100
B	1250	1620
C	735	850
E	100	100
F	435	540
G	480	568
H	765	935
J	601	710
K	521	644
O	445	550
P	550	600
R	360	455
T	40	75
N (female thread)	DN32	DN40
Weight, kg	148	208
Water volume, l	5.8	9.8

Non-standard versions (explosion-proof, anti-corrosion, air purification, increased cooling capacity and other functional sections) are available on request. If the mounting height falls outside the permitted range, please contact the manufacturer.