Installing Air Conditioning Unit Before Purchase or Installation Calculate the size of room to be cooled so that you buy an AC unit with enough capacity. Obtain permission for installation from building management. Make sure that electrical service is adequate. AC units should have dedicated outlets. Ensure that the window and frame where the unit will be installed are in good condition. Follow the manufacturer's instructions. Make sure the unit is installed securely. You may use metal brackets, mounting rails, etc. Supporting metal brackets, interior angles, etc. should be structurally fastened to the building and must be strong enough for the size and weight of the AC unit. Objects or shims used to adjust the position of the AC unit must have an independent source of fastening or attachment. Secure leveling objects to prevent movement and shifting due to vibrations from the AC unit, wind and other weather conditions. Install the AC unit so it remains in place when the window is opened, or affix it so that the window can't be opened accidentally.

Tilt the unit slightly to provide water drainage, but don't over tilt. Do not use loose objects - such as wood blocking, bricks, telephone books, gypsum board or cans - to support the leveling of the AC unit. Do not place anything (TV antennae, satellite dishes, plants, etc.) on top of the AC unit. Do not block fire escape windows or other exits with the AC unit. A work permit or equipment use permit is generally not required to install a common window AC unit, unless the unit exceeds three tons/36,000 BTU/hr. For more information, see the NYC Building Code. It is important to periodically check on the position of the AC and the condition of the window frame to make sure that the AC remains supported and secure.Written First thing to clear up is what sizes do air conditioners come in. Typically, AC units are measured by “tons”, but this measure is not referring to the actual unit weight. This measure indicates the capacity of the air conditioner to cool the room where it is installed.

Technically, a ton is the AC’s ability to cool 12,000 BTUs. central air conditioning unit typesIronically, this measure that stands for British Thermal Unit, is not used in Great Britain at all and it is originally related to heating capacity.split unit air conditioner vs window air conditionerUsually, it is recommended to install air conditioners from 1 ton to 5 ton.1 ton => 12,000 BTU2 ton => 24,000 BTU3 ton => 36,000 BTU4 ton => 48,000 BTU5 ton => 60,000 BTUIt is important to keep in mind that a bigger AC unit will not necessarily work better. air conditioner heat pump unitUnlike old air conditioners, modern units work in cycles, slowly but steadily. It helps to keep your energy bill under control.If you get an AC unit that is too big for your home, it will turn off before completing its due cycle, and it will turn on again when the heat make the temperature to rise.

This continuous turning off and on will result in a more expensive energy bill.Here is an approximation suggested to choose the best AC size:Another way is to use this formula:Total = Length (feet) x Breadth (feet) x Height (feet)And then, use this chart to choose the appropriate AC size:Make sure you also consider other factors for effective AC cooling like:Number of Windows in the room.Appliances that produce heat: TV, Desktop, etc.The amount of sunlight the room receives.You always can ask for expert advice in order to choose the most suitable unit for your particular needs.Written This is not adequate information for the decision . You have to specify the ambient temperature conditions. heat load inside the room and the desired temperature range to get an accurate answer. However you can get a rough estimate here :Cooling Calculatoralso for detailed reading refer to : http://courses.washington.edu/me...Updated There are other variables to consider before the question can be answeredIs the ceiling exposed to direct sunlightHow many walls get direct sunlight?

Use link at bottom of this page to calculate exact needsAir conditioner selection: understand Tonnage, EER, COP and Star RatingSummary of ideal room size for 1.5 ton AC is is as followsIf you are on top floor 170 sq feet (max)If you are on top floor and more than 1 wall receives direct sunlight150 sq feet (max)If you are not on Top floor , One or less walls receive direct sunlight190 - 200 sq feet (max)If you are not on Top floor , Two or more walls receive direct sunlight170 sq feet (max)The above calculations are assuming 10 feet high ceiling. Written For a 1.5 Tr Window AC with Reciprocating Compressor minimum room size should be 15' x 12'=180 Sq Feet and with the same AC one can also cool a room of  Maximum 20' x 12'=240 Sq Feet. At present I am using Azure Windows AC 1.5 Tr with Reciprocating compressor in the above mentioned room sizes, and cooling is very fast even with 4 people in a room. With Rotary compressor Room size can be between 150-200 sq feet.This could be due to one of the following reasons:

The file or page you are looking for no longer exists.The URL that was typed is incorrect. or by phone at 1-800-430-3376.Air Conditioner(AC) or Cooling capacity Calculator Air Conditioner(AC) / Cooling Capacity Calculator. This calculator will help you to find an accurate size for an adequate room air conditioner unit capable of cooling the room. Room Air Conditioning Calculator To Calculate Room Air Conditioning: Target Room To Cool Unit Size Required: BTU/Hour This tool will help you dynamically to calculate the Room Air Conditioning. Wind Chill Calculator Rain Harvest AC Tonnage Calculator Cloud Base Looking for a Portable Air Conditioner? BTU Makes a Difference in Decorating on April 14, 2010 by Staff Writer Portable air conditioner BTUs make all the difference between whether you’ll have a unit that cools your room well or one that works poorly. You might be tempted to go with the cheapest unit that you can find at the store.

Let’s face it, these units can be expensive and cost more than what many renters can afford. However, you can make up the costs later in the savings you get from using less energy than a heat, ventilation and air conditioning (HVAC) system, central air conditioning and some window units. If you get a unit with insufficient BTUs though, you won’t enjoy any savings in your electricity bill. British thermal units (BTUs) indicate how fast an air conditioner can cool a room. It measures the amount of heat (how many BTUs) that the air conditioner removes from the air. Portable conditioners with BTUs that are too low for a room’s size won’t cool all of the room, because it can’t. The higher the BTUs, the larger the room size it can cool. If you purchase a portable air conditioner that has too many BTUs for the room, then you’ll be using much more power than you need, which results in higher bills from your electric company. Your goal when shopping around for a unit is to find the air conditioner with the right number of BTUs for the room size.

Each air conditioner lists the BTUs in its product description online or on the box, which corresponds to a maximum room size. 5,000 BTU Portable Air Conditioner Expect a portable air conditioner with 5,000 BTUs to cool a room that’s no more than 175 square feet. Try to find one with a dual hose to cool the room even faster. Variation in temperature control settings is also key, and you should make sure that the portable air conditioner that you’re considering has one. If you want to cool a room that’s 200 square feet, then you’ll need a portable air conditioner with 8,000 BTUs. If you have enough money to buy one with a self-evaporative system, that’s even better. You won’t have to worry about emptying out trays every day, which is the case with non-evaporative units. Living room areas or large bedrooms that are around 300 square feet will need a portable air conditioner with 10,000 BTUs. Some units include a built-in shut on/shut off thermostat to help you conserve energy.