thanks man...that chart says my a.c is nowhere near what it should be...my temps get down but during lights on they can get a bit too warm
[SIZE=-1][/SIZE]
How to Choose an Air Conditioner - BTU Chart
[SIZE=-1]AirCondAPedia [SIZE=-2]©[/SIZE][/SIZE]
Enter your search terms Submit search form [SIZE=-1]
Search This Website - InspectAPedia.com[/SIZE]
[*]How to choose an air conditioner that fits the building and your cooling needs?
[*]How big an air conditioner do I need?
[*]How much air conditioning do I need? How many BTUs or Tons of Air conditioning?
[*]Can an air conditioner be too powerful for the building?
[SIZE=-2]
Our site offers impartial, unbiased advice without conflicts of interest. We will block advertisements which we discover or readers inform us are associated with bad business practices, false-advertising, or junk science. Our contact info is at inspect-ny.com/appointment.htm.[/SIZE]
How to choose an air conditioner for window or through-wall mounting, how much BTU capacity do you need? Also see [SIZE=-1]
COOLING RULES OF THUMB[/SIZE] to guesstimate how many tons or BTUs of cooling a building needs and see
[SIZE=-1]RATED COOLING CAPACITY[/SIZE] to determine the cooling capacity of existing air conditioning equipment. © Copyright 2008 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left.
Use links at the left of each page to navigate this document or to view other topics at this website.
Green links show where you are in our document or website.
Typical BTU Cooling Capacity Range for Air Conditioners
Portable, window, or through-wall air conditioners are typically described by their manufacturer as suited for:
- Single Room Air Conditioner Capacity - typically for rooms up to 20' x 20' or 400 sq.ft. in area. BTUs in this product range are typically from 6,000 BTUh to 10,000 BTUh.
- Multiple Room Air Conditioner Capacity - typically for a total area of up to 800 sq.ft. BTUs in this product range are typically from 10,000 BTUh to 16,000 BTUh.
- Large Capacity Air Conditioner Capacity - typically for multiple rooms or very large rooms up to a total area from 900 sq. ft. to 2,000 sq.ft. BTUs in this product range are typically from 16,000 to 28,000 BTUh.
- Central Air Conditioning - typically to cool an entire floor or multiple floors in a home. Also see [SIZE=-1]A/C TYPES, ENERGY SOURCES[/SIZE]
To determine the BTUs needed to cool a given space follow this procedure:
- Calculate the total square feet to be cooled: Measure the size of the room (or rooms) to be cooled, to obtain total square feet. Multiply room length by width for each room and if there are multiple rooms, add the room areas together to get a single number.
- Read the Base BTUs needed from Table 1 below
- Add additional BTUs for these factors:
- + 4,000 BTUs for each room below a ceiling or roof which is not insulated
- + 4,000 BTUs for a home or residential kitchen included in the cooled area
- + 1,500 BTUs for each window which receives significant daily sunshine
- + 1,500 BTUs for a room over a kitchen or boiler room IF the kitchen or boiler room is actively producing heat during the cooling period
- + 600 BTUs per person over two, if more than two occupants will be occupying the room during the cooling period
- Subtract BTUs from the total required if these factors are present:
- - 1,000 BTUs if the room is on the shaded side of the building
- Calculate the final total BTUh needed from the above steps. This should place you in the right range of cooling capacity needed. Review the warning below about buying an oversized air conditioner.
The table below gives recommended air conditioning BTU's necessary to cool a single room. The data in the table assumes that the ceiling over the room is insulated and that the room is not over or is not itself a special heat-producing area such as a kitchen or boiler room.
Table 1: Base BTUs - Recommended Air Conditioner BTUsNumber of
Rooms
CooledRoom Area
MINimum
sq.ft.Room Area
MAXimum
sq.ft.BTUs
NeededOne.1004,000 - 6,000One1001806,000 - 7,500One1802707,500 - 9,000One2704009,000 - 10,500Several.40010,500 - 12,000Several40050012,000 - 13,500Several50070013,500 - 15,000Several70080015,000 - 16,500Large Areas.90016,500 - 18,000Large Areas900100018,000 - 19,500Large Areas1,0001,10019,500 - 21,000Large Areas1,0001,10019,500 - 21,000Large Areas1,1001,20012,000 - 22,500Large Areas1,2001,50022,500 - 24,000Large Areas1,5001,70024,000 - 25,500Large Areas1,7001,90025,500 - 27,000Large Areas1,9002,20027,000 - 28,500
is your air conditioner in the actual window? If it is not in properly it will actually heat up your room rather than cooling it down...learned from experience
the a.c. is mounted properly but it gets well into the 90's here so the room only gets down to 80-85 during lights on.
I have about the same question as predator. Do you have the A?C unit just sitting in the room running? You do not really HAVE to place it in a window. You could also vent the A/C unit back into your home, this can save on heating bills during the winter.
I love the winter time. My grow room pretty much heats my house. I do not vent outside during the winter at all. My heat is hardly ever turned on during the winter time because of this.
i'm workin on it ldb, i guess i'm gonna buy a bigger unit for the room.
How to Choose an Air Conditioner - BTU Chart 
you can get with stubborn/ignorant people and i wouldnt ignore your advice even if you were as patient as albfuct
