Help me to choose

What is ventilation?

We spend a significant amount of our time inside buildings. As a result, it is critical that the air we breathe and interact with is of high quality. Indoor pollutants are effectively reduced when an indoor space is properly ventilated. Whether in an office, a classroom, or a room in the home, adequate
ventilation and good air quality are goals to strive for.
The process of maintaining an intentional inflow of clean outdoor air into a space while simultaneously removing stale air is known as ventilation. Everyone requires access to clean air. Indoors, commercial, residential, and industrial spaces require proper ventilation, as well as smart temperature and humiditycontrol. Poorly ventilated environments can be hazardous to our health.

Function

The primary function is to keep the air in an enclosure at appropriate temperatures, humidity, pressure, speed, and pollution level to ensure the health and well-being of people or living beings.

Flow rate

This is the amount of air that is displaced per unit of time. (The flow given in the technical specifications is at free discharge, in other words, with no pressure loss). Flow is represented by the letter Q and is usually expressed in m3/h, although it is also commonly expressed in m3/min, m3/sec, l/s, C.F.M

1m3/h = 3,6 l/s 1,7 m3/h = 1 C.

What is pressure?

It is the pushing force per surface unit required for air to circulate and overcome system resistance (pressure losses). Pressure is given in: mmH2O and Pa.

9,8 Pa = 1 mmH2O

There are three types of pressure:

Static Pressure (Pe): This is the force of the air on the tube’s walls in all directions, perpendicular to them.

Dynamic Pressure (Pd): Is the force that accelerates the air from zero to the system’s velocity. It only manifests itself in the direction of the air.

Total Pressure: This is the sum between the static pressure and the dynamic pressure Pt = Pe + Pd

What is noise?

It is the audible sound that is transmitted through the air and is irksome to the receiver.

The Sound Pressure (Lp) level is what we actually hear, and it varies depending on the environment and the distance between the noise source (extractor or fan) and the receiver. The Sound Power (Lw) level is the amount of sound energy produced by a sound source (extractor or fan) every second and is constant, that is, it does not vary depending on the premises or distance from the sound source.

How to choose a fan?

You need to know the following parameters:

Output
Pressure
Sound level
Type of Electricity Supply

Output (Q m³/h): You must determine the necessary flow according to:

The recommended renewals regarding the volume of the premises in m3 and the activity

Q = m3 * Renew/h

Renew/hour table (air changes table)

The recommended renewals regarding the number of people there are in the

Q = nº person * m3/h

Normal activity with no smoking	29 m3/h per person
Normal activity with smoking	58 m3/h per person
Light physical activity	45 m3/h per person
Industrial warehouses and premises	60 m3/h per person

When localised extraction is required near the contaminating source, the flow (Q) will be calculated using the following factors:

Surface area of the hood
Speed of catchment
Transport speed by the recommended renewals system in relation to the number of people in the premises.

Q = 3.600*V*S = m3/h Q = Necessary air flow (m3/h)

V = Speed of catchment (m/h)

S = Hood or ducting section (m2)

Step 1: Select Installation Location I.e., room/bathroom/living room/Kitchen etc.

Step 2: Get the Measuring Tape and measure the size of your room.

Step 2: Use formula for calculation and get room size.

Example:- (ACPH- Air change per hour)

Once you’ve determined the size/CFM of your space, you can contact the maryllis support team for assistance in selecting the right fan based on technical details, and you can choose the best solution for your available space from a wide range of fans.
You can also send us your area drawing for a more accurate Ventilation Fan selection.

Ventilation fan: Ventilation fans, as the name implies, are used to ventilate residential or commercial spaces. Unlike exhaust fans, ventilation fans not only exhaust air, but also ventilate it. The specific point is that it can exhaust stale air from the room while also bringing in fresh air from outside.
Exhaust fan: Its purpose, as the name indicates, is to exhaust the air. This air is the odour, humidity, oily smoke, house smoke, and other filthy air that is exhausted from the indoor to the outdoor.

Amaryllis exhaust fans, which come in a variety of sizes ranging from high-speed to heavy-duty models, can be used for both residential and commercial purposes. They come in a variety of colors, shapes, sizes, and premium designs.
Types: –

Bathroom Series
Multipurpose Series
Inline Series
Industrial series

Yes, Amaryllis sells accessories that are specifically designed and engineered to enhance the performance and longevity of your Amaryllis products without jeopardizing the architectural integrity of your space. We have a wide selection of fully functional and aesthetically pleasing accessories to meet your requirements.

Yes, the fan’s orientation has no effect on its operation. When running horizontal duct to the outside, it is advisable to slightly slope the duct down to the outside vent (this allows condensation (if any) to run out of the duct naturally).

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Renew/hour table (air changes table)

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