Category Archives: Indoor Air Quality

Multi zone Industrial and Commercial Air conditioners


Industrial air conditioners are installed today in all enterprises, factories, manufacturing plants, business centers, shopping halls, sports complexes, large area (over 250 sq. M). Industrial air conditioners provide uninterrupted air conditioning, refrigeration and heating. Features industrial air conditioners – a complexity of use, energy efficiency, the cost of equipment. Industrial air conditioners have a resource 20 – 30 years of operation.

Multi zone system allows to condition several rooms and even the whole building. Each room is set the indoor unit and is supported by individual micro climate. Compared with the installation of individual air conditioners multi-zone air-conditioning system can save money, space, installation time. Multi-zone air conditioning units can be controlled centrally or individually. Designed for buildings containing a few (or a few dozen) areas with different requirements to the air.

Multi zone air conditioning system – profitable, convenient, safe

More than thirty years ago (1982) Daikin Company made a revolutionary breakthrough in the field of HVAC equipment by launching multi-zone air-conditioning system – VRV, which means “Variable refrigerant volume.” Since the company has patented, not only the system itself but also the abbreviation of VRV, as a trademark, other companies began to produce such equipment, began to use the name of the VRF «variable refrigerant flow.” However, in both cases we are talking about one and the same principle of operation of multi-zone air-conditioning.

Features multi-zone systems

  • Multi-zone air-conditioning system – it is the climate system inverter, which is installed in buildings with a large number of premises, providing a separate temperature control in the individual zones.
  • The multi zone system includes one outdoor unit and a lot of internal. The outdoor unit is connected to the internal pipework. Amount of internal blocks, drop their height relative to the outdoor unit, performance, pipe length are defined by the model and brand of the selected multi-zone air conditioning.
  • Multi zonal air conditioning systems use a modular design, so their installation are taken into account wishes of the customer in terms of the number of indoor units and their types (duct, cassette, floor, wall, ceiling).
  • Multi-zone air-conditioning system can be operated to cool the air in the same room at the same time, warming in the other, producing just enough cold and consuming as much energy as necessary to indoor units. Outdoor unit operating mode changes with the load of indoor units.
  • Control each indoor unit is carried out from the local console or centrally from the control center. Temperature parameters given in every room maintained at a constant level with high accuracy.
  • The performance of a number of multi-zone systems can serve the high-rise buildings.

Panasonic WhisperGreen Select – Best Indoor Air Quality Solution


Select Panasonic is a best solution to maintain indoor air quality, which reconstructs the ventilation industry with a new set of functions that allow you to customize and install more than 250 different configurations.

It has a speed switch Integrated Pick-Flow to select the desired air flow (50-80-110 CFM). Plug and play modules also contribute to the further expansion of the setting.

It has a DC motor technology and mounting Smart Flow Flex-Z Quick angle used in accordance with the latest codes and industry standards.

With Smart Flow function, when the fan faces static pressure, the speed is automatically increased to provide optimum CFM output. This feature provides confirmation that the installer does not have to worry about damage to the fan performance.

The choice of energy-efficient office buildings air conditioning systems


The microclimate of office space has a decisive influence on the individual performance of people, especially – temperature parameters of the environment in the room. Tired and not the location of the work is very often the consequences of poor indoor climate parameters, while, with significant economic consequences. With the construction of office buildings of class “A” requirements to a microclimate of comfort increased significantly, necessitating the installation of professional technically air conditioning systems.

One of the challenges of designing modern office building is to identify possible thermal regime at various measures of its software in the choice of economically viable option, maintains optimum air-heat treatment of all premises taking into account the coefficient of security.

Selection of the air conditioning system in the building must be carried out on the basis of carefully consider the terms of reference. The job has specific requirements for the microclimate (thermal comfort, a minimal amount of outside air and movement of air in the room to be ventilated, noise level and other parameters relevant to the purpose of each room context). It is necessary to take into account the desired life of the system, to assess the future costs of maintenance and operation. You also can not neglect the aesthetic requirements of the designer, the client and the user.

The architecture of the building and its layout have a direct influence on the choice of the air conditioning system. Along with the climatic characteristics, they are the source of data for determining the external heat gain, a significant proportion of which in the warm season of the solar radiation. Obviously, the constructive measures for sun protection are able to greatly reduce the load on the air conditioning system.

Need Periodic cleaning of HVAC systems



Physical discomfort, irritation or dryness of the eyes, nose and throat, cough, nausea and respiratory and mental fatigue, memory disturbances, drowsiness, apathy, dizziness or stress problems are some of the health problems caused when people remain much time inside modern office buildings, due to contamination factors that may be specific to the same premises, stuffy or poorly functioning facilities air conditioning.

These factors may come from the characteristics of human activity, primarily as odors and smoke snuff, which causes discomfort, irritation and discomfort, as well as contaminants that may have the same outside air for ventilation.

Moreover, it seems that many new materials currently used in construction and furniture and decor, produce fumes that are slowly joining the indoor air, as in the case of paints, dyes, paints, adhesives, etc.

These air conditioners because of its enclosed spaces such as coils, condensate tanks, pipes Desagotes, etc., deprived of light at a stable temperature, moisture and dirt as nutrients can cause a process of putrefaction that becomes a broth ideal for the growth and proliferation of plant or animal organisms, consisting in pathogenic bacteria, fungi, yeast or virus culture.

Given this background, the World Health Organization (WHO) in 1982 has established that buildings with a percentage of more than 20% of people experiencing acute effects on health and wellbeing due to pollution levels, make a condition called Sick Building Syndrome (SBS).

It has been determined that dust is the main transporting agent of allergic substances, composed of a variety of organic and inorganic components, including fibers, mold spores, pollen grains, mold, insects and mites, produce symptoms ranging from mild irritation severe breathing problems that can arise even in chronic diseases.

Surge of all the above, the need Necessary for all building that has air conditioning installations involving air treatment, which by construction, extension tubes, activities that they develop and how many people occupy, to establish rules requiring periodic cleaning ducts, plus air conditioning.

As for the tasks could be considered Cleaning General Specifications for Commercial Air Conditioning Systems established by the NADCA (National Air Duct Cleaners Association) Standards.

CO 2: The criterion of efficiency of ventilation systems



The impact of indoor air quality of buildings on the health of people given special attention as environmentalists, doctors, diagnosticians, and engineers, designers of ventilation and air-conditioning. The quality of the air depends on the physical condition of the person: the poor air quality people feel unwell, loss of concentration, the development of diseases, and so on. D

By hazard, subject to the assimilation of ventilation systems, gaseous pollutants are emitted in the process of breathing and through the skin surface (ammonia, hydrogen sulfide, acetone, and so on. N.), as well as chemical volatile compounds emitted from furniture and decoration materials in the room. In the course of human breathing in normal conditions are subject to change in the concentration in the main two components of air: oxygen and carbon dioxide.

During the metabolic processes in the human body the concentration of oxygen in the exhaled air drops from 20.9 to 16.3%, and carbon dioxide, on the contrary, increases from 0.03 to 4% [4]. Attention is drawn to the fact that the concentration of carbon dioxide increases by more than 100 times.

Specialists have found that the degree of concentration of gas pollutants emitted person closely correlated with the concentration of the carbon dioxide emitted during breathing humans . In this connection, the concentration of carbon dioxide has been accepted as an indicator of air quality . Other harmful gas emissions in residential and public buildings (phenol formaldehyde, acetone, ammonia and other components allocated furniture, decoration materials) lead to carbon dioxide equivalent .

Pollutants from furniture and decoration materials (mainly formaldehyde and anilines) in relation to the hazard produced by people are largely assimilated and multidirectional airflow calculated from the concentration of CO 2. As a rule, in the absence of people in the room background ventilation rate of 0.1-0.2 h -1 is sufficient for assimilation hazards of furniture and decorative materials.

Indoor air quality, depending on the concentration of carbon dioxide:

  • 1st class (optimum microclimate, high quality) – the concentration of carbon dioxide is not more than 400 cm 3 / m 3 ;
  • Grade 2 (optimum microclimate, average quality) – the concentration of carbon dioxide from 401 to 600 cm 3 / m 3 ;
  • 3rd class (permissible microclimate allowable quality) – the concentration of carbon dioxide from 601 to 1000 cm 3 / m 3 ;
  • 4th Grade – unacceptable high concentrations of carbon dioxide, poor air quality – more than 1 000 cm 3 / m 3.

The advantage of this approach to the definition of air quality and ventilation required in relation to the traditional (for specific air flow rate or ventilation rate) is as follows:


  • it is possible to take into account when determining the degree of ventilation of outdoor air pollution;
  • an incentive to increase the effectiveness of ventilation: supply of fresh air in the breathing zone, to avoid crossing the air-giving stream of dirty areas in the room;
  • can be accounted for the presence of fresh air in the room before filling in human beings;
  • can be well defined background ventilation to remove hazards from furniture and decoration materials after hours;
  • Improve the adequacy and accuracy of monitoring air quality at the expense of direct measurements of carbon dioxide concentration in the occupied zone premises.

Nest: Next Generation Thermostat for your Home


If you’d rather save your hard-earned money than spend it on rising monthly energy bills is a great way to save more, a programmable thermostat is a beneficial investment it Prevents unnecessary heat and cold when your out of home.


Thermostats can be easily adapted to your everyday schedule, unwanted heating / cooling wasted, which is not currently being used. You spend less energy, reduce your costs, reduces emissions of carbon dioxide (CO2) and fully enjoy the comforts of home.

Nets thermo stat have the capability handle most of the heating and cooling appliances in your home

Nest Learning Thermostats

Nest Labs, bring the level of design and functionality, which are mounted on the walls of a quarter of a billion US homes and offices and that control their internal temperature.

Nest thermostats automatically records the temperature level you adjust every time and automatically its start controlling your heat level in your home. Inbuilt sensors will humidity, temperature, light and movement and change the temperature whenever the climate changes.

The sensors of Nest will know that you are not home, if the sensors is not notice any movement for longer time, automatically adjust the temperature. If you install multiple thermostats, they will work independently, but at the same time interact with each other: so that if you enter the foyer, the thermostat upstairs will know that you are at home

Special designed app will allows you to control your from home anywhere. In case you’ve forgot to turn off nest thermostats automatically makes it for you. Through Wi-Fi nest will check the local weather condition from its server and adjust the system accordingly.

Features on Nest Thermostat

  1. Sunblock
  2. The Leaf
  3. Time-to-Temperature
  4. Airwave
  5. Auto-Tune
  6. Cool to Dry



Nest thermostats have well-crafted its design and very easy to install use with help of video tutorials. The system match feature from nests website will allows it to work with your existing system