GRM 725

Description
Characteristics
Downloads
Dimensions
Additional diagrams
Legend

Description

APPLICATION	DESIGN
Exhaust ventilation, heating and air conditioning networks in industrial, commercial and domestic premises.	Made of high-quality metal shape with polymer coating Polymer or anodized grille coating ensures weather-resistant properties. Shutters are made of PVC plactic. Non-standard sizes may be ordered.
MODIFICATION
Available modifications with an adapter (A) for connection to air ducts. Available modifications with versatile fixing (u) or with special springs (p) for fast mounting.

Characteristics

Parameter	GRM 725	Measurement unit
Form	Square	-
Material	metal shape with polymer coating	-
Adjustment	nonadjustable	-
Inner cross section size	641х641	mm

Files archieve

Downloads

Dimensions

Characteristics

Parameter	Value	Measurement unit
L	725	mm
L1	675	mm
L2	661	mm
e	327.5	mm

Additional diagrams

Calculation formula		Correction factor К_p
ΔP_p = ΔP х К_p			0°	22°	45°
ΔP_p = ΔP х К_p		К_p	1	1.25	1.5

Calculation formula		Correction factor К
L_WA = L_WAO x K		S_ap [m²]	0.01	0.02	0.05	0.1	0.2	0.4
L_WA = L_WAO x K		K [dB(A)]	-9	-6	-3	0	+3	+6

Designation:

ΔP_p - pressure loss at various vane positions [Pa];
ΔP - pressure loss [Pa];
К_p – correction factor for pressure loss calculation depending on louvre deflection angle;
L_WA - sound power level [dB(A)];
L_WAO - sound power level for air pass 0,1 m² [dB(A)];
K - correction factor for sound power level calculation depending on air pass [dB(A)];
S_ap - air pass [m²];
V - rated speed [m/s].

Legend

VENTS GRM 725