TKV 660 D3 EC | H. Östberg

TKV 660 D3 EC Updated: 2025-09-15

7351244 -

TKV 660 D3 EC-y1 Black

7351243 -

TKV 660 D3 EC-y1 Galv

Roof fan with square connection.
Vertical outlet.
High performance and proven reliability.
Impeller with backward curved blades.
The external rotor motor has maintenance-free sealed ball-bearings and is very energy efficient.
Speed controlling can be done with the built-in potentiometer, 0-10 V alt. external control.
Integrated motor protection.
Junction box has enclosure class IP 54.
Fan housing is manufactured from galvanized sheet steel which is polyester plastic coated in black as standard.
Swing-up design to simplify maintenance and cleaning of the impeller.
The easiest way to mount the roof fan is with a roof curb TFU.
The fan complies with environmental requirement M2.

Generating diagrams...

Variable control

User input

Air Flow (l/s)

External static pressure (Pa)

Data

Air Flow (l/s)

External static pressure (Pa)

Power (W)

Speed (r.p.m.)

Current (A)

Voltage (V)

400

Efficiency (%)

SFPv (kW/m3/s)

Change the "User input" by dragging the point, or by entering new values.

Generating diagrams...

	TKV 660 D3 EC-y1 Black 7351244		TKV 660 D3 EC-y1 Galv 7351243
Parameter	Value	Unit	Value	Unit
Voltage	400	V	400	V
Phase	3	~	3	~
Frequency	50/60	Hz	50/60	Hz
Power	1760	W	1760	W
Current	2.71	A	2.71	A
Speed	1960	r.p.m.	1960	r.p.m.
Max. temperature of transported air	60	°C	60	°C
Sound pressure level at 3 m	80	dB(A)	80	dB(A)
Weight	42.2	kg	42.2	kg
Enclosure class	44	IP	44	IP
Insulation class, motor	F		F
Duct connection	660x660	mm	660x660	mm
Max. flow @ 0Pa	2210	l/s	2210	l/s
Max. pressure	1099	Pa	1099	Pa
Voltage range	380-480	V	380-480	V

Parameter	Value	Unit
(a) Manufacturer	Östberg	-
(b) Model code	TKV 660 D3 EC	-
(c) Declared type	NRVU / UVU	-
(d) Type of drive	Variable speed drive	-
(e) Type of HRS	N/A	-
(f) Thermal efficiency	N/A	%
(g) Nominal flow rate	1.385	m³/s
(h) Effective power input	1.666	kW
(i) SFP int	N/A	W/(m³/s)
(j) Face velocity	4	m/s
(k) Nominal external pressure	617	Pa
(l) Internal pressure drop	N/A	Pa
(n) Static efficiency	55.1	%
(o) External (and internal) leakage rate	N/A (N/A)	%
(p) Filter classification	N/A	-
(q) Visual filter warning	N/A	-
(r) Sound power level	87	dB LwA
(s) Disassembly instructions	fsp.ostberg.com	-