APPROACH № 1. AIR QUALITY CALCULATION
Turnkey home ventilation is a service, where we are constantly working to improve.
Therefore we recommend to you the principle of the organization of system of ventilation - according to calculations on level of carbon dioxide (CO2), on the basis of VAV system (with valves of variable air supply).
What is special about this approach?
The performance of the ventilation system is based on the indicators of the level of carbon dioxide in each room. It is monitored using CO2 sensors, which we place in key rooms (bedroom, children's room, living room).
In addition to the sensors, the ventilation unit is equipped with variable air supply valves (VAV valves). They are also installed in each room at the rate of 1 valve on 1 air duct. Focusing on CO2, the valves open when it rises (it is known that the level of carbon dioxide rises where people are) and close when the air quality returns to normal. The norm is considered to be 500-600 ppm, this value you can always set yourself when setting up the vent.
Implementing the CO2 level approach, in the calculation we get at least 60 m3 / h of air per person, since it becomes possible to limit ourselves to a smaller supply where there are no people, and at the same time supply large volumes of air to those rooms where the supply is really needed.
Of course, there may be situations when air quality deteriorates in several rooms simultaneously - for example, guests have come to your place. Then the ventilation unit reduces the air supply in other zones (using VAV valves) and directs the main volume to the "problematic" rooms. If this is not enough, it starts to increase productivity step by step.
When the indicators return to normal, the power of the installation decreases again. On average, it is 120-170 m3/h, since most of the time it works in automatic mode at minimum speed.
We would like to note that when implementing the classical approach (No. 2), the capacity of the ventilation unit always remains within the range of 250-350 m3/h, which is less economical in terms of energy consumption and less comfortable in terms of the volume of supplied air (60 m3/h per person against 36 m3/h).
Therefore, we recommend to our clients the air quality approach - as effective. Of course, due to the use of additional equipment (VAV valves, CO2 sensors) and more complex implementation, the system will cost a little more.
However, comparing the efficiency and cost of some solutions, we found an option that fully satisfies us and our customers in terms of price, functionality and quality.
We are talking about Jablotron Futura air handling units. Their indisputable advantage is the ability to implement a variable air supply system on "native" Jablotron equipment in a completely automatic mode. This is no longer offered by any manufacturer.
Additional Jablotron options:
- VAV valves VarioBreeze;
- BoostButton programmer for enhanced air extraction from dirty areas;
- ModBus control protocol;
- cooling module CoolBreeze, which cools (or warms up - depending on the season) supply air;
- stove hood Faber with Jablotron automation;
- CO2 controllers and sensors.
We figured out the peculiarities of air flow into clean zones. Now let's talk about dirty areas. In order to explain everything in details, for instance, we continue to take Jablotron ventilation systems.
HOW IS AIR RECEIVED FROM DIRTY AREAS?
Air from dirty areas is removed by means of VAV-valves programmed for extraction. At the same time, the inflow and exhaust of air are carried out in a balanced way: the same amount m3 / h we supply to the clean zones, we remove it from the dirty ones.
For enhanced exhaust from toilets and bathrooms, a BoostButton chip is used, which is integrated into the light switch. When it is activated, air from the problem area is extracted more intensively (for example, in a normal situation we remove from 50 m3/h from 2 bathrooms and a bathroom, and when you take a bath, you activate BoostButton and 100 m3 / h is removed from this zone, and in 2 bathrooms, the hood will be carried out in a volume of 25 m3/h. The total volume remains the same - 150 m3/h).
The activation period for the enhanced hood can be set independently. At its end, the rate of air removal decreases to the previous values.
This gives us another advantage of the approach - it is no longer necessary to use exhaust fans. At the same time, air removal occurs constantly, and if necessary, it is intensified, definitely more efficient and more rational than with the classical method of exhausting from dirty areas.
How does the air get out of the kitchen?
Jablotron Futura air handling units also have the ability to remove air above the hob effectively.
When you turn on the hood in the kitchen, the pressure switch is triggered, which transmits a command to the BoostButton chip and the unit raises its capacity to 350 m3/h, even if it had previously operated at minimum speed.
At the same time, air removal is minimized as much as possible in all dirty areas and is emphasized only above the hob.
Today we can offer an even more efficient and stylish solution - a Faber air extractor integrated into the ventilation system with Jablotron automation.
Such a hood allows you to take in polluted air and transfer heat and moisture to the recuperator, instead of removing them outside through the ventilation duct. Accordingly, we do not waste resources by using the heat and moisture of the air removed from the kitchen to heat the supply air.
This solution does not require the construction of a separate ventilation duct for the discharge of dirty air.
олег
Позвонил в компанию Альтер Эйр по советам моих знакомых. Объяснил задачу, по телефону вежливо предложили несколько вариантов решений. Выбрали наиболее подходящий. Был приятно удивлён скоростью и качеством планировки и монтажа вентиляционной системы. Ребята сделали свою работу на ура, за что буду советовать услуги и оборудование компании Альтер.