Mycond OXA-D — ductless hot water heating unit

Warm air heating for high-bay spaces — no ductwork, no radiators

Air flow rate: 6700 ... 9700 m³/h

Heating capacity: 28 ... 103 kW

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Mycond

OXA-D

Mycond OXA-D is a ceiling-mounted warm air unit for halls where heat keeps collecting under the roof instead of reaching the floor. It runs on hot water from your existing boiler, circuit or heat pump — no ductwork, no radiators along the walls, up to 9700 m³/h of air handled by a single machine.

Mycond OXA-D ceiling unit with axial fan and swirl air diffuser

Why it pays off

Heating output 28…103 kW from water at 60–90 °C.
One unit covers up to ~1200 m² instead of a dozen radiators.
Warm air is pushed down to the working zone — the roof stops being the warmest place in the building.
Installation height 4–17 m, noise below 60 dB.
Stepless VAV control of fan speed and supply angle.
No ductwork: the unit takes air through its side grilles and blows it straight down.

How the air moves

Airflow simulation of a Mycond OXA-D unit: warm jet down to the floor and return along the walls

The unit draws overheated air from under the roof, passes it through the heat exchanger and sends it down as a wide swirling jet. When the jet reaches the floor it spreads across the area and rises back along the walls to the intake, closing the loop. Nothing stays trapped at roof level, so heat losses through the roof drop instead of growing with every added kilowatt.

Inside the unit

Cutaway of a Mycond OXA unit: axial fan, water heat exchanger and swirl diffuser with guide vanes

Three components do the work: an axial fan with a permanent-magnet motor at the top, a water heat exchanger below it, and a swirl diffuser with adjustable guide vanes at the bottom. Air enters through the side grilles, gives up heat on the coil and leaves as a rotating jet — the vanes set how far and how wide that jet travels.

Compared with radiators and wall heaters

Thermal comparison: radiators heat the roof space, Mycond OXA heats the working zone

Radiators and wall-mounted heaters release heat upwards: a hot cushion builds under the roof while the working zone stays cold. OXA-D works the other way round — it drives the warm jet down to floor level and keeps the temperature even where people and machines actually are. That difference shows up directly in the gas bill.

Wireless control

Mycond OXA wireless control system with OXA-V terminal and OXA-T2 sensors

What the controller actually adjusts

Guide vane position — the supply angle changes steplessly: a tight jet down to the floor in winter, a wider fan pattern in mild weather.
Fan speed — frequency control across the whole range, no fixed steps.
Wireless sensors — OXA-T2 temperature sensors sit in the working zone, not next to the unit, so the setpoint is held where it matters.
One terminal for the whole fleet — OXA-V or OXA-V2 handles up to 1024 units within a 2 km radius, with zones and weekly schedules.
Supervision — Modbus RTU into the BMS, parameter and alarm log on a PC, access from a smartphone.
Protection — phase monitoring, over-voltage and over-current cut-out, water circuit anti-freeze, soft start.

Technical data

Model	OXA-D-I	OXA-D-II
Fan speed, rpm	0~900	0~860
Air flow, m³/h	0~6700	0~9700
Voltage, V	380±5%	380±5%
Electric power, kW	0~0.85	0~1.80
Current, A	0~1.65	0~3.60
Installation height, m	4~10	4~17
Control mode	Stepless VAV regulation
Noise, dB	<60	<60

Heating performance

Water, °C	Model	Q, kW (10 °C)	Q, kW (15 °C)	Q, kW (20 °C)
90/70	OXA-D-I	66	61	56
80/60	OXA-D-I	57	52	47
70/50	OXA-D-I	46	42	38
60/40	OXA-D-I	38	33	28
90/70	OXA-D-II	103	96	88
80/60	OXA-D-II	88	81	74
70/50	OXA-D-II	74	66	59
60/40	OXA-D-II	59	51	44

Figures in brackets are the return air temperature. Maximum working pressure 800 kPa, maximum supply air temperature 60 °C.

Dimensions

Dimension, mm	OXA-D-I	OXA-D-II
A	900	1100
B	1000	1165
C	735	850
E	100	100
G	480	568
H	765	935
N (internal thread)	DN32	DN40
Weight, kg	121	176
Water volume, l	5.8	9.8

Dimensional drawing of the Mycond OXA-D unit with A–N callouts

DWG drawings are available on request.

Where it is used

production halls and machine shops;
logistics centres and high-bay warehouses;
vehicle workshops and service stations;
sports halls and public buildings;
agricultural and processing facilities.

We size and lay out OXA systems for industrial, logistics and sports facilities across Europe — send the building geometry, heat loss figures and the available heat source, and you get a unit layout with airflow coverage, a bill of materials and a quotation.

Frequently asked questions about the Mycond OXA-D

Does it need ductwork?

No. The unit takes return air through its side grilles and blows it down through the swirl diffuser, so no duct runs are needed anywhere in the hall.

What heat source does it work with?

Any water circuit: a gas or biomass boiler, district heating, a heat pump or waste heat. Graphs are available for 90/70, 80/60, 70/50 and 60/40 °C.

How many units does a hall need?

One OXA-D-II covers roughly 800–1200 m² depending on height, insulation and air change rate. We prepare the layout and the calculation free of charge.

Can it cool in summer?

OXA-D is a heating-only unit. If you also need cooling, the same casing is available as OXA-K, which runs on chilled water and has a drip tray and condensate drain.