re: The home / office air-conditioner thread
Originally Posted by khoj
Hey, logging in after a break of sorts. Now what the person on the other forum is saying is partly correct and partly incorrect too.
He is right in saying that more current is drawn during the 'on' operation compared to flat out running. However he is incorrect in saying that a slightly smaller capacity is the way to go. This is like using a 10 ton capacity truck to carry 15tons. The reason he propagates that is to keep the compressor running to avoid the off and then the energy sucking 'on' operation.
The inverters also avoid the off and on but in a different manner. Once the desired temp is achieved the inverter mechanism slows down the compressor that is the RPMs or the SPMs (rotary/reciprocating respectively) are reduced. This allows the unit to hold the temperature constant and avoid the off on cycle. This infact will get better results than a lower capacity unit running full steam all of the time and also result in much lower wear and tear as the unit is able to run much lower speeds once the initial load has been met with. Further on the flip side during situations when the load is higher than usual a properly sized inverter will be able to increase the speed of the compressor to meet the increased demand where as the undersized machine will huff and puff all it wants and yet leave everyone uncomfortable in the process.
Trust that answers the query.
Please see my comments in bold within your post
That is one keen salesman. It is a great idea.
A cousin has a couple of these two in one machines (with the heat pump) and they work great.
I myself have three 9 fin Delonghi's for our bedrooms, varying between 160 and 125 sq.ft and one 11 fin Usha lexus for the tv/dining area + living room both rooms being approx. 240~280 square feet. The bedroom units are good to go through with the worst of winters, the larger rooms however do need a 9 fin unit in addition to the 11 fin unit during the coldest parts of the season say December 3rd week to January end.
The thing is that the Delonghi units are no longer available after the ruling necessitating the ISI mark to be present on all electrical items being sold in Dilli was implemented. I checked a lot of other brands in the market last season but eventually found that the Usha lexus was the best thing going. Having siad that it is not a patch on the stuff by Delonghi. In this scenario you would be better off getting the heat pump units. BTW have you bought water heaters for the next winters?
The only negative that these machines have is that they can cause dryness which the oil filled radiators will not. This is based on the experiences of my cousin and his parents who run these machines in their bedrooms. My aunt and uncle are more uncomfortable compared to cousin and his wife, guess that is due to the age differential.
Talk to the Daikin guys and try get the 'Ururu Sarara' machines. Three is a good no. to bargin with and the carrot of an additional two will only help smoothen things out.
thanks for sharing the experiences.
Dealer says 'Ururu Sarara'
not available in India.
1. what about the water heaters ?
so are saying that the Usha lexus cannot perform at the same levels at as the Delonghi and wont be able to warm up a room comfortably. this is my situation.
i can go with 1.5 Ton. 1.
Inverter Hot & Cold @ 67000 ( inclusive of stab, installation, pipe etc. )
Total Cost for heat & cool = Rs 67000 2.
Inveter Cool only @ 45860 ( inclusive of stab, installation, pipe etc. )
Usha Oil Filled Heater @ 9000 to 12000
Total Cost AC + Heater = Rs 56000 ( rounded figures ) Difference between option 1 and 2
= Rs. 11000
So as you can see for Rs 11000 more i have following advantages
1. Single unit for both hence neater and cleaner arrangement.
2. No need to allocate space for the Oiled filled heater and no need to worry about storing it away during summers.
3. I'm assuming the Inverter based heating will be more cost efficient with lower electricity bills than the Oiled filled heater. ( need clarification )
On a cost of three 1.5 ACs with Inverter Cool + Heat this will be an added cost of around Rs 33000 over a three AC + Oiled filled Heater combination.
I'm a little hesitant to make a decision. But i have to make a decision for sure within the next 24 hrs as the heat is already unbearable.
Khoj, What do you suggest ?
Last edited by rana_kirti : 2nd May 2011 at 19:34.