For the area-based control of the air conditioning system it was decided to use the following equipment:
- channel air conditioners of the Japanese brand Daikin
The first indoor unit Daikin FDXM25E, according to the project, is located in a technical room and is responsible for the microclimate in the office room. Its work is organized in such way so the supply is situated near the window, the air exhaust is made at the opposite side of the room. Diffusers Look 2600×40 are situated throughout the whole room.
The Daikin FBA50 air conditioner is located in the bathroom. We have chosen a model of a medium-pressure air-conditioner, since in such models the grate is located at the bottom and opens the access to the filter (eurohatch), that is an undoubted advantage for the maintenance of air conditioning. In this case, the lowering of the ceiling in the technical room does not play an important role. The main drawback of such device is its noise level of work. In order to reduce the level, two sound attenuators were installed.
The work of the air conditioner is organized according to such scheme: air supply is directed along cabinets and a fireplace, the second flow is directed towards the living room. The rest of the living room does not fall under the influence of the air conditioner. This decision was made jointly with the designer and taking into account the health of the family.
The kitchen has double-slot diffusers, the total length of which is 10 meters. 8.5 m is used for the air conditioning system; the rest of the length is involved in the ventilation system. The difficulty in implementing such solution was in a necessity to fit in the entire length of the diffusers and correctly deploy it.
This floor is maintained by three internal units of low-pressure air conditioners Daikin FDXM25E.
To ensure a comfortable temperature in the children’s room, the air conditioner is installed in the bathroom. Air ducts are located throughout the corridor and their length accounts for 4-6 m.
For the second children’s room, we installed one more indoor unit in the corridor, and it was decided to implement an unusual solution for locating the diffusers. Their unit was moved to the cabinets, and the air exhaust is carried over the beds. The air conditioner was originally planned to be installed in the bathroom, but in order to avoid possible future inconveniences, the choice was made in favor of the corridor.
For the last bedroom with an access to the terrace, we installed air conditioning in the bathroom. The air exhaust will be carried out near the cabinets.
The entire air-conditioning system has an area-based control, since it was mentioned in the client’s requirement. We used Madel Look diffusers, which were intended for hidden installation. They are compact and have an aesthetic appearance. Their installation on the object is made with a minimum lowering of the ceiling (see the scheme of the ceilings).
Two outdoor units of the multi-split system Daikin 3MXS68 are installed on the facade of the house.
Our engineers made a thermal calculation for this object, considering all the enclosing structures. Based on the calculated data, as well as building standards, we established an individual temperature mode for each room in the house. This led to the use of a system that ensures an even distribution of heat in the house and also allows energy saving in the future. It was decided to implement the following equipment:
- air-to-water thermal pump of the German brand Viessmann;
- gas boiler of the German brand Viessmann;
- radiators and heaters of the German brand Kermi
- seamless pipes of the Finnish brand Uponor
- solar collector of the German brand Viessmann.
A Viessmann Vitocal 200-S heat pump and a Viessmann Vitodens 100-W 26 kWt gas boiler are located in the boiler house. The first equipment is used as the main source of heat. The second as a backup. Moreover, we installed 2 tanks:
The first tank is used as a buffer tank for the heat pump (accumulates heat in case of defrosting and uninterrupted operation of the pump);
The second tank is designed for the hot water system. It has two heat exchangers — one for a heat pump, the other is separated from the tank and is intended for a solar collector.
Since the main heat source is an air-to-water thermal pump, we decided to use a warm water floors to create a comfortable temperature in the rooms. The lower is the supply to the heating system, the higher is the power and the conversion of electrical energy into thermal energy. This approach reduces the use of electricity, thus allows to save during the heating season.
The warm floors, as a comfortable source of heat in the house, provide floor heating up to 26-27 °C and are designed for full-fledged work with outdoor air temperature down to -7. When there is a more significant temperature drop outside, radiators and heaters of the German brand Kermi become engaged and warm up the house to a comfortable temperature level. They are used as an inert heat source. Pumping units of the brand Viessmann Divicon, supply heat to the radiators, and the second group delivers the temperature to the warm floors, which are optimally matched on the basis of the outside temperature.
The warm floors cover both floors and its total area is 109 m2. For their implementation, we used seamless Uponor pipes.