TE_addict said:
This is totally wrong. The actual tonnage is more dependent on surface area of walls and surface temperature of wall. If a room is only 100sq ft but has its walls and celing exposed to direct sunlight then u can expect higher cooling capacity required compared to even a 200sq ft room without the walls and ceilings exposed to direct sunlight.
However for commercial installations, number of people in room comes as a factor because the water vapor released due to sweating and breathing adds up to condensing load on AC evaporator. For normal domestic usage, u can neglect this parameter.
One more thing, if u put a higher capacity AC than required then u lose comfort. Might sound funny but a higher capacity AC frequently gets cut on and off according to set temperature(24-25'C). But the humidity level shoots up the moment the compressor gets off, making u feel uncomfortable. It is always a thumb rule- DECIDE THE TONNAGE OF AC A LITTLE LOWER THAN THE MAXIMUM CALCULATED( HEAT+HUMIDITY). This gives maximum comfort and minimum electricity consumption.
For the brand of, get O-General if on budget. Otherwise if u want to spend more get Daikin VRV systems. It actually varies the tonnage of AC according to temperature set inside the rooms so that the compressor never cuts off. Hence u get the maximum comfort.
Hope this helps a bit.
the quote in red is in opposite to what i used to believe till today, what i have been told always is that you install an AC just .25 tonne more than what your room measurements require. It may help in electricity consumption.
Right now i have
ONe electrolux Split 1.5 tonne and Two Frizair window 1.5 tonnes ACs installed.
i am satisfied by their services over the period of last 5 years.
I am getting installed two 1.5 tonnes one, and one 1.0 tonnne ACs next week infact the work is on right now for installing tubing and electrification modification.
I have selected Onida this time around because it has highest rated BTU compared to all the other models in market.
If you need the best go for O-general, Daikin (they do have reciprocating compressors in their split models) which are quiter, better cooling, long term satisfaction. Hitachis also fall just a tag below ( they have recently introduced a new product line ranging from 30-40ks)
these three brands retail upwards of 40 k plus installation charges.
If you are on a budget
You got Electrolux / Onida / Whirpool to choose from almost same on parameters with slight variations here and there. almost simillar pricing. 20-25 k for 1.5 tonnes.
You must avoid korean brands LG / Samsung and also chinese brands like TCL.
hope this helps.
