What's your A/Cs cooling capacity (in practice)?


#1

My Sabro 1.5ton seems to be nearing it's life after 3 years of function and I think I'll dispose it off next season.

It takes ~30mins to get the temperature of a 10x10ft room to 25C. I believed it would be able to cool the joint room when the door's open, which is an a 15x12ft room, however that's not the case. If I keep the door open, after 1+ hour the temperature reaches 30c or so in the other room.

Please share your experiences, mentioning the room size and a/c type each time :)


#2

dear, could it be that both your rooms combined are too big for the 1.5 ton air conditioner?

a/c are commonly coded in 'tons'. 1 ton is actually 12000BTU, so 1.5 ton ac is 18000BTU, and so on.

u can calculate the BTUs required to effectively cool your rooms by measuring the width and length of both your rooms in metres, and then use this formula:

Room Area BTU = Length (m) x Width (m) x 337

this will give you the desired BTU needed, and also indicate if u require a 1.5 ton or even more powerful a/c.

references:

1. http://www.openxtra.co.uk/articles/calculating-heat-load.php

2. http://www.articlealley.com/article_29625_47.html


#3

[quote=", post:, topic:"]

dear, could it be that both your rooms combined are too big for the 1.5 ton air conditioner?

a/c are commonly coded in ‘tons’. 1 ton is actually 12000BTU, so 1.5 ton ac is 18000BTU, and so on.

u can calculate the BTUs required to effectively cool your rooms by measuring the width and length of both your rooms in metres, and then use this formula:

Room Area BTU = Length (m) x Width (m) x 337

this will give you the desired BTU needed, and also indicate if u require a 1.5 ton or even more powerful a/c.

references:

1. http://www.openxtra.co.uk/articles/calculating-heat-load.php

2. http://www.articlealley.com/article_29625_47.html

[/quote]

That’s helpful, thanks. Apparently, my 1.5 ton a/c (19,500BTU) should be sufficient for cooling both the rooms. ((10+15) / 3.1 x (10+12) / 3.1) x 337 = 20.4k which is very close estimate.

Many people say that a 1.5ton a/c is enough to cool a 600-900sqft area.


#4

I think you AC may need service or gas charging or your room walls facing directly to sun, thats why it is taking too much time to cool. What time it took to cool at night time? It is not possible to cool another room as 1.5 would not cover lot area.