Regulations

SFP Specific Fan Power Classification

The p_SFP or SFP (Specific Fan Power) is a coefficient from the EN 13779 standard (Ventilation in non-residential buildings - Performance requirements for ventilation and air conditioning systems), which allows the overall energy efficiency of a fan or ventilation system to be qualified.

The SFP is the ratio between the power input and the flow rate of the fan or ventilation system:

The SFP is therefore calculated for each flow/pressure point of the fan curve.
The lower the SFP, the more energy efficient the fan.
Fans or ventilation systems can thus be compared and classified according to a table from the EN 13779 standard.

The p_SFP or SFP is sometimes expressed in kW/m3.s-1.

This concept of SFP is indicated on the flow/pressure curves as they are updated.

IP / AF / IK protection ratings

Different indices make it possible to characterize the behavior of products in relation to these influences:

• IP, Protection Index: specifies the resistance of the material against the penetration of solid foreign bodies and against the penetration of water with harmful effects.
• Protection index that specifies the material that protects people from access to dangerous parts.
• AF: specifies the resistance of the material against the presence of corrosive or polluting substances.
• IK: specifies the resistance of the material against mechanical shocks.

Note: Protection against explosion hazards or conditions such as moisture, corrosive vapors, fungi or vermin are not represented by these ratings.

These protection ratings are product-specific. For them to be extended to the rest of the installation, the device must be properly integrated, ensuring that the original level of protection is maintained.

IP PROTECTION RATING

Meaning of the last two characters of the IPxy protection rating

• x characterizes the protection of the material against the penetration of foreign solid bodies.
• It characterizes the protection of the material against the penetration of water with harmful effects.
  
  

1er figure Protection against solid bodies
1		Protected against solid bodies greater than 50mm
2		Protected against solid objects larger than 12.5mm
3		Protected against solid bodies larger than 2.5mm
4		Protected against solid bodies larger than 1mm
5		Protected against dust (no harmful deposits)
6		Completely protected against dust

2th figure Protection against solid bodies
1		Protected against vertically falling water drops (condensation)
2		Protected against water drops falling up to 15° from the vertical
3		Protected against rainwater up to 60° from the vertical
4		Protected against water splashes from all directions
5		Protected against water jets from all directions using a hose
6		Protected against water projections similar to sea spray
7		Protected against the effects of temporary immersion
8		Protected against the effects of permanent immersion

Resistance to water penetration due to high pressure cleaning (Karcher) is specified by the IPx9K index.

• PERSONAL PROTECTION INDEX AGAINST ACCESS TO DANGEROUS PARTS

It is completed with a final letter Z, the IPxyZ code. It is used when the actual protection of people against access to dangerous parts is better than that indicated by the first digit x of the IPxy index.
When only the protection of persons is of interest to specify, the two characteristic figures of the IP are replaced by X.

Example: IP XXB.
Designation letter:
HAS protected against access from the back of the hand
B protected against finger access
C protected against access by a Ø2.5 mm tool
D protected against access by a Ø1 mm tool

AF PROTECTION INDEX AGAINST CORROSIVE OR POLLUTING SUBSTANCES

The practical guide UTE C 15-103 defines the AF protection class taking into account the presence of corrosive or polluting substances.
The absence of an indication means that the external influence class is AF1 (negligible risk of corrosive or polluting substances).

• AF2: atmospheric agents.
• AF3: intermittent or accidental presence.
• AF4: permanent presence of corrosive or polluting substances.

The NF C 15-100 standard, 2002 edition, gives the operating conditions and deals more specifically with class AF.

IK MECHANICAL SHOCK PROTECTION INDEX

The NF C 20-010 standard defines the degree of protection against mechanical shocks, symbolized by a characteristic number following the two figures of the IP degrees.
It is the subject of a European standard project EN 50-102 to define an IK code.
The tables on the following pages present the degrees of protection of the enclosures and take into account the equivalences between the old third digits of the IP code of the NF C 20-010 (1986) standard and the IK code.

EUROCLASSES fire resistance

• The unified European classification of products called EUROCLASSE
• The old French classification of incombustible, M0, M1...

The European classification system includes 7 Euroclasses:

• A1 and A2: non-combustible product.
• B: low-combustible product.
• C: combustible product.
• D: highly combustible product.
• E : highly flammable and flame-spreading product.
• F: unclassified or untested product.

And an additional classification for fumes and drops (or particles).

Two additional classifications relating to the production of smoke on the one hand, and of flaming drops or particles on the other, complete the main Euroclass, with the exception of Euroclass A1.

Each additional ranking includes 3 levels:

* These measurements are carried out according to standardized tests

EUROCLASS EQUIVALENCES / OLD CLASSIFICATION

Pending a review of fire safety regulations taking into account the integration of Euroclasses, a table published in the Official Journal makes it possible to make the link between the regulatory requirements expressed with M classifications and the Euroclasses already applied to products.

Corrosive environments: materials and protection

GENERAL INFORMATION

Corrosive environments can more or less quickly damage ventilation equipment, such as fans, networks, terminals, etc., or the components (motors, turbines, pulleys, screws, electrical accessories, etc.) that make them up. A corrosive environment includes the outside atmosphere, the inside environment, and the gases carried by the ventilation system. A fan by the sea will be exposed to both the outside air and the aggression of the salt air drawn in by the ventilation system.

According to standard NF EN ISO 12944-2

Durability is defined by the NF EN ISO 12944-1 standard as the expected lifespan of a system protected by paint until the first major maintenance operation. Durability is a technical parameter that can help build a maintenance plan. Durability is not a guaranteed duration.

VIM MATERIALS: MAIN MATERIALS - PROCESSING OPTIONS

• GENERAL INFORMATION

It is advisable to carefully read the descriptions of the materials in the catalogs and instructions, to determine whether the material and its treatment are suitable for the environment, the application and the desired durability. As standard, most of our products are designed for installation indoors (corrosivity category C1 or C2) or outdoors (corrosivity category C2). Some product ranges are designed to meet the needs of more corrosive environments. The casing of our AHUs, commonly installed outdoors, is made of pre-painted steel or alloy-coated steel that allows installation in environments with a corrosivity category of C4 or even C5. This is the case, for example, of VSA and VSB fans in PPH or diffusers or terminals in ABS.

• STAINLESS STEEL

NOVAX and VORAX range hoods are made of AISI 304 L stainless steel. AISI 304 L stainless steel is suitable for standard professional kitchens. In industrial or food processing applications, it is sometimes necessary to choose 316 L or another grade depending on the food products being processed.

Note: In screws we speak of A2 or A4.
A2 = AISI 304 or 304L. A4 = AISI 316

TYPE OF STAINLESS STEEL
Range	Product	AISI 304 stainless steel	AISI 316L stainless steel
REMV	Circular registers	▪️	▪️
REEV	Circular registers	▪️	▪️
REIC	Iris Registers		▪️
RDGC	CAV circular registers	▪️	▪️
CDR 50	Rectangular registers	▪️	▪️
CDR 100	Registers rectangular	▪️	▪️
CDRE 200	Registers rectangular	▪️	▪️
RDGR	Registers rectangular CAV	▪️	▪️
BISR	Low-speed terminals	▪️
GCPI	Low-speed terminals	▪️
GMAI	Exterior grilles	▪️	▪️
SIL GA	External acoustic grilles	▪️	▪️
SIL OPTIMUM 50	Circular silencers	▪️	▪️
SIL OPTIMUM 100	Silent circulars	▪️	▪️
SIL RBS+	Rectangular silencers	▪️	▪️
SIL RBD +	Silent rectangular	▪️	▪️
DCRS A - DCRD A + Plenum	Circular diffusers		▪️
DAFR DF + Plenum	Diffusers slotted square		▪️
DJHR - DJHC - DJHD + Plenum	Swirl diffusers - fixed blades		▪️
DJHM - DJHMO	Diffusers with helical jet - adjustable vanes		▪️

If you have any doubts or questions, please contact our sales teams, providing all the precise information on the application and the environment of the equipment.

• GALVANIZED STEEL - ZINC (ZN)

The sheets and strips commonly used by VIM to manufacture boxes, fans, spiral ducts and network accessories are hot-dip galvanized steel (S250GD) Z275 compliant with EN 10142. This means that the steel is covered with a layer of Zinc of 275 g/m2, i.e. a coating of 20 microns per side. Its maximum operating temperature is 200°C continuously and 250°C at peak. Beyond these temperatures, the adhesion of the zinc is impaired, which reduces the corrosion resistance. This type of steel is suitable for environments classified C2 with high or very high durability, or C3 with lower durability. For environments of type C4 or C5, it is advisable to choose another material (Alu / Stainless steel / other) or to plan a paint treatment.

Galvanizing life in an outdoor environment

White rust on galvanized steel

This is zinc hydroxide that forms under the action of moisture in the absence of ventilation. For example, when fans / boxes wrapped in plastic film to protect them during transport become damp and are not unpacked. While these stains affect the appearance, they do not affect the life and strength of the zinc coating. To remove them, the first action is to scrub with a stiff nylon bristle brush. They can be washed with a 10% acetic acid solution.% and rinsed. This treatment may remove some of the metallic luster.

• METAL COATED STEEL - ZAM ALLOY (ZN-AL-MG)

Manufacturers have developed coatings including aluminum (Al) and magnesium (Mg) in addition to zinc (Zn).

These steels provide better corrosion resistance than galvanized steel for identical weights. They provide self-repairing protection for the edges.
This is the case of S250GD + steel ZM310 (310 g/m2 coating on both sides).

Its corrosion resistance is much better than Z275 and allows its application in environments with corrosivity category C4 with high durability and C5 with low or medium durability depending on the applications and suppliers.
It is particularly suitable for environments with high SO2, high chlorine or high ammonia.

This type of steel is an alternative to the use of other materials or anti-corrosion treatment such as paint.

This type of coating is used on some of our CTAs and on the JBRB ECOWATT range of 400°C 30 min VMC units.

• PRE-PAINTED STEEL GRANITE^® HDXTREME ARCELOR

The outer casings of our double-skin CTAs, CAD O INTEGRAL / CAD HR OPTIMAL / UTBS ECOWATT / KSDE ECOWATT / KSEF ECOWATT ranges are made of Granite-type pre-painted steel.^® HDXtreme in RAL7024.

In this configuration, the steel (S250GD + Z275) is coated on the outside with a 3-layer coating of 70 microns and on its inside with a 12 micron support layer.
Granite^® HDXtreme combines the best UV and corrosion protection with durability and a unique finish.
It has been developed to guarantee a long service life in very harsh environments, particularly at the seaside.

Its UV resistance places it in the RUV5 category and its corrosion resistance in the RC5+ category according to standard EN 10169, authorizing its use in C5 environments with average durability.

• VIM TREATMENT OPTIONS TO IMPROVE CORROSION RESISTANCE

For certain ranges of ventilation boxes and turrets, we have defined several treatment options depending on their use, the nature of the environment, and the desired durability. These may concern the casing, the fan, the motor, or the screws, depending on the case. Precise information on the composition of standard components and the nature of the treatment of the different options is available for each product sheet on en/

• F400 boxes: KDT/KCTR/KUBAIR
• C4 boxes and ventilation: JBRB ECOWATT /KSH
• F400 Turrets: TED/TCD

For other products, please contact us.

Aerodynamic and acoustic concepts

Download the airflow and acoustic calculations