Before you choose an air conditioner (AC), first thing you need to do is to understand your room in terms of average people using them at a time, electrical equipment, furniture & appliances that are part of the room. A living room will be occupied by more number of people on an average & will probably have more appliances that may comparatively more emit heat. So, you'll be better off with higher capacity AC in a similar sized living room than a bed room, which probably will be occupied with in the evening & night hours.
Exposure to direct sunlight is also another important factor for air conditioning. If you plan to use AC in a room that is exposed to direct sunlight, then the AC will have to put in more effort. Also, ceilings that are exposed to direct sunlight heat more resulting in higher ambient temperature & thus require higher capacity AC.
Split and Window ACs
Residential air conditioners are widely available in 2 physical forms - split & window.
Non-Inverter & Inverter ACs
The material used for condenser coils used in AC affects their efficiency, their ease of cleaning and maintenance. Two types of condenser coils are used in ACs - copper & aluminium.
Pros & Cons of both these condensers are:
It's important to look for corrosion protective coating applied on condenser & higher warranty on condenser.
You can use following formula to arrive at approximate tonnage rating (Tr or ton) that will be ideal for a particular room size:
AC Tonnage = (Length X Width X Height in feet) 1000
For example, if a room is 10 feet in length; 8 feet wide & 10 feet high, then - (10 X 8 X 10) / 1000 = 0.8. Hence recommended AC would of 1 Tr (or Ton) capacity.
However, you also need to consider capacity increment of approximately 0.5 Tr if any of the following conditions are also applicable for the room:
The ISEER is thus calculated with the same indoor temperature, but over a range of outside temperatures 24 – 43°C (based on national weather data for 54 cities across India) and is the BEE approved the measure.
|REFRIGERANT||OZONE DEPLETION POTENTIAL||GLOBAL WARMING POTENTIAL|
It's important to opt for AC with environment friendly refrigerants like R290.
Technological advancements have made possible manufactures to offer much more than just cooling with ACs. So, you should evaluate ACs based on following must have features as well:
Its important to opt for AC with filtration system with anti-bacterial & anti dust filters helps you to maintain air inside room free from viruses, bacteria, fungi, dust particles, hairs, spores, etc.
Uniform Cooling in the room
Many a times users complaint about uneven cooling (e.g. - person/s sitting near the AC experiencing colder temperature & person/s sitting in the same room but away from AC experiencing warmer than ideal temperature) inside the room. Modern ACs come equipped with intelligent sensors that avoid this phenomenon and ensure uniform cooling inside room by regulating air throw of AC.
Power Saving mode
With AC being one of the largest power consuming devices; it’s necessary to look out for ACs with built in power saving modes.These modes ensure best running of AC ensuring better cooling with maximum power saving. Also; the ideal temperature to operate an AC is 24 degrees. This provides sufficient cooling to the user, but also ensure efficient operation.
Ability of AC to work as dehumidifier & relieve excess humidity in the room. This helps in smoother operation in monsoon months.
Ability of AC to automatically adjust room temperature (by increasing temperature periodically & then returning to set temperature) to ensure comfortable sleep.
Few ACs come equipped with active carbon deodorizer which help in eliminating odours & deactivating other harmful gases.
Installation & Warranties
Correct installation is extremely critical in for optimum performance on any AC. Hence installation by certified & trained technician is desired. There are few manufactures that offer free standard installation by certified technicians as well.AC is an electro-mechanical equipment with parts like compressors & condenser which are exposed to direct atmosphere & thus exposed to dust, rain, harsh sunlight, etc. So you must pay attention to warranties that are being offered by manufacturers on these critical component. Higher warranty ensures worry-free product experience.