Question about Heating & Cooling

I am uncertain whether you are posing a question here, or making a statement about it.

It is true that the floor area of the space is a major factor, but there are others, the ceiling height, glassed areas, ground or first floor, insulation present or absent, internal heat load from persons, appliances etc, room usage, it goes on. Also the profit motive is in there.

I've had consultants with extremely sophisticated graphs and calculations, which I thought were being used more as a gob-smacker than anything relevant.

In the end it's quite true that most sales people fall back to the floor area, then they pick a power output range depending on a sort of porridge of all the other factors which affect it, as here

http://www.airandwater.com.au/blog/size-air-conditioner-need/

http://www.currentforce.com.au/room-sizing-guide/

.

It is true that the floor area of the space is a major factor, but there are others, the ceiling height, glassed areas, ground or first floor, insulation present or absent, internal heat load from persons, appliances etc, room usage, it goes on. Also the profit motive is in there.

I've had consultants with extremely sophisticated graphs and calculations, which I thought were being used more as a gob-smacker than anything relevant.

In the end it's quite true that most sales people fall back to the floor area, then they pick a power output range depending on a sort of porridge of all the other factors which affect it, as here

http://www.airandwater.com.au/blog/size-air-conditioner-need/

http://www.currentforce.com.au/room-sizing-guide/

.

Jan 18, 2017 | Heating & Cooling

what is 17M ? meter or millimeter ? or thickness ?

Oct 24, 2016 | Home Security

5m is equal to 500cm, so 5m is greater than 50cm.

Feb 26, 2015 | Office Equipment & Supplies

That would depend on how much water you're adding to. Adding 10ml of HCl to a thimble of water is not the same thing as adding 10ml of HCl to a swimming pool.

May 22, 2013 | Office Equipment & Supplies

30 pi meters^2 or about 94.25 square meters.

Apr 17, 2013 | Office Equipment & Supplies

The Old Rule of Thumb is 400 square feet per ton, but you really need to do a heat load calculation to be safe. A lot of windows on the west or south side of the house will really increase your load and you may need a lot larger unit. Insulation also changes your load so you may be able to cool a larger area. You may be able to get the Heat Load Calculation Form either online or from Johnstone supply. They are on the internet.

Aug 07, 2012 | Coleman Heating & Cooling

Here is a list of the standard and official ping pong room
sizes. I guess that if you're planning a ping pong room in your house, you can
use the last in the least as your minimum. But remember, the bigger, the
better..

International Events, World Championships & Olympic Games

14m x 7m (46 feet x 23 feet)

National tournaments

12m x 6m (40 feet x 20 feet)

National league / Representative matches

10m x 5m (33 feet x 16 feet 6 inches)

Local league / Local tournaments

9m x 5m (30 feet x 16 feet 6 inches)

Recreational play and coaching

8.5m x 4.12m (28 feet x 13 feet 6 inches)

Jul 09, 2012 | Sport & Outdoor - Others

6/(m+3)+2/m=5m-3/(m^2-9)

By mulitlypling with (m+3)

6+(m+3)*2/m=5m*(m+3)-3/(m^2-9)*(m+3)

6+2+6/m = 5m^2+15m / (m - 3)

8+ 6/m = 5m^2+15m /(m-3)

By mulitlypling with (m-3)

8*(m-3) + 6*(m-3)/m = 5m^2*(m-3)+15m

8m -24 +6 - 18/m = 5m^3-15m^2+15m

Changing sides

5m^3-15m^2+7m = -18/m -18

multiplying by m

5m^4 - 15m^3 +7m^2 + 18m +18=0

Feed this equation and see.

By mulitlypling with (m+3)

6+(m+3)*2/m=5m*(m+3)-3/(m^2-9)*(m+3)

6+2+6/m = 5m^2+15m / (m - 3)

8+ 6/m = 5m^2+15m /(m-3)

By mulitlypling with (m-3)

8*(m-3) + 6*(m-3)/m = 5m^2*(m-3)+15m

8m -24 +6 - 18/m = 5m^3-15m^2+15m

Changing sides

5m^3-15m^2+7m = -18/m -18

multiplying by m

5m^4 - 15m^3 +7m^2 + 18m +18=0

Feed this equation and see.

Jul 12, 2011 | IBM Rational Rose XDE Developer Plus...

Total area = 46x10=460

Max Students @ 1.5 Sq. M = 460/1.5 = 30.666666666666666666

Total air in class = 10x46x15 cu.M = 6900

so for each student 6900 / 30.666666666666666666 = 225 cu.M

Hope that helps!

Max Students @ 1.5 Sq. M = 460/1.5 = 30.666666666666666666

Total air in class = 10x46x15 cu.M = 6900

so for each student 6900 / 30.666666666666666666 = 225 cu.M

Hope that helps!

Feb 09, 2011 | Computers & Internet

Could be several factors. Let me start by saying the unit you have should cool a room that totals around 450 square feet (Approx.).

If you do not know your rooms square footage just multiply the width of the room x the length of the room.

(e.g. 20' x 10' = 200 SF)

The above 450 SF is for a room with typical 8' ceilings. This is also a "Rule-Of-Thumb" measurement, as windows, doors, insulation, and air leakages (heat gain) also play a role in calculation of heat loads. But this will get you close....

If the room is larger than 450 S.F. in size then the unit is too small for this size room.

A rule of tumb for sizing is: every 600 square feet requires a ton (or 12,000 BTU) of cooling. Again, without doing a proper load calculation on the room or area being cooled, it is hard to be exact.

The other possibility is the unit is not operating as it should due to mechanical or other issues. This is hard to specify. COuld be refrigerant levels are low, coils dirty, or filter dirty.

If you do not know your rooms square footage just multiply the width of the room x the length of the room.

(e.g. 20' x 10' = 200 SF)

The above 450 SF is for a room with typical 8' ceilings. This is also a "Rule-Of-Thumb" measurement, as windows, doors, insulation, and air leakages (heat gain) also play a role in calculation of heat loads. But this will get you close....

If the room is larger than 450 S.F. in size then the unit is too small for this size room.

A rule of tumb for sizing is: every 600 square feet requires a ton (or 12,000 BTU) of cooling. Again, without doing a proper load calculation on the room or area being cooled, it is hard to be exact.

The other possibility is the unit is not operating as it should due to mechanical or other issues. This is hard to specify. COuld be refrigerant levels are low, coils dirty, or filter dirty.

Sep 02, 2010 | Maytag Portable Air Conditioner M6P09S2A

Sep 20, 2017 | Heating & Cooling

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