“A room airconditioner is ideal for rooms upto 200 sq.ft when one of the walls is exposed to the outside.
If there are no exposed walls a Split AC is the only option. In addition, in a Split AC the compressor is kept outside and hence, noise levels are lower.”
Window ACs and Mini Split ACs work on single phase. However, it is better to have a 3 phase supply and distribute the other loads like Geysers, washing machines, pumps and lights in the other 2 phases.
An inverter air conditioiner delivers cool air by varying the frequency of the compressor & thus regulates the refrigent to satisfy room cooling requirements & achieve the desired temperatuire with minimum fluctuations . It eliminates waste with precise control. In this way its more energy efficient.
Providing a false ceiling (especially for Room Airconditioners/ Multi-split Airconditioners) reduces the volume to be cooled.
Providing curtains/ blinds /sun film on windows reduces heat input into the room.
Insulating the ceiling which is exposed to the sun with 50 mm thermocole drastically reduces heat input into the room.
A normal Window AC or split AC will throw air upto 15 feet. However, special Split units are available to throw air upto 30 feet.
The compressor which is the most critical component in the AC works between 190 to 240 V. With voltages in most parts of our Country going well below 190 V, we recommend using a Voltage Stabilizer.
At a height of 5 feet behind you. Ensure that the AC air from the airconditioner does not hit you directly.
Filter cleaning depends on the frequency of usage and the atmospheric conditions. For normal applications, it is recommended to clean the filter once in 15 days.
If units are installed and maintained properly, the false ceiling will be safe. However, if the drain is not sloped properly or the drain pipe is choked, water will overflow into the false ceiling and spoil it. Since the unit is inside the ceiling, the false ceiling has to be opened frequently for attending to the unit. Care must be taken to provide a proper trap door and also handle the trap door properly to ensure that the false ceiling is not spoiled.
Ask for the EER (Energy Efficient Ratio) of the AC. The higher the EER, the more energy efficient the AC.
While perfumes do create a good atmosphere, they should be used cautiously as some people can be allergic to them. The best way to keep the foul smell out is to open windows and use fans to bring in a lot of fresh air before the AC is started. Keeping the AC room clean is also equally important.
3 phase units are better especially when multiple units are used as they ensure better balance on the power system. However, they can be used only if all 3 phases have power, whereas Single phase units can be used even if power is available in any 1 phase.
Not necessarily. While false ceiling does reduce the cooling load when non ducted units are used, it is provided mostly for aesthetic purposes. If you have no problems with exposed ducts, you don’t have to provide false ceiling. Alternatively, flexible ducts with better finishes and Turbo Splits are also available.
We would strongly recommend that you do. Insulating the Underdeck of an exposed roof with 50 mm Thermocole saves nearly 2 Tons of airconditioning. The cooling load with insulation is around 6 Tons. Without the insulation, it would be 8 Tons or 33% more. Not only do you have to pay more initially for larger equipment you will unnecessarily spend money continuously on power.
The feeling of coolness or warmth is highly individualistic and depends on each person’s metabolism. It is however imperative that temperatures are maintained uniformly at each nook and corner of the Office. Balancing the airflow is very important to achieve uniform temperature.
Where AC is used for human comfort, the ideal setting is 24oC. AC experts have determined that the comfort zone is between 20 to 25oC with RH between 40% and 60%.
Window ACs and Mini Split ACs are very simple to operate and can be operated by individuals in whose cabins these machines are installed.
Ducted Splits and VRVs need a little bit of training and your electrician / office boy can be made to operate these units.
Keeping the door open obviously means that cold air will get out leading to loss of efficiency in the AC system. However, in establishments where there is no choice but to keep it open “Air Curtains” can be installed. These curtains provide a sheet of air at the opening which prevents cold air from getting out.
A Software office is normally heavily populated. Moreover, carpets, printers, xerox machines and other office equipment need a larger quantity of fresh air than normal. It is recommended to use at least 15 cfm of fresh air per person.
Specify energy efficient systems like Scrolls, Centrifugals.
Ask for details of part load performance. AC Systems are designed for peak loads which occur only for 2% or so of the time. How the AC works during part loads is important.
Use multiple circuits wherever possible for better part load performance.