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Since October 26, 2015, all ENERGY STAR rated room air conditioners have been required to meet a new standard, ENERGY STAR 4.0, that sets maximum power use at 10% less than older models following the 2014 guidelines. And, when used to provide cooling only where they're needed, room air conditioners are less expensive to operate than central units. 1.5 ton split ac power consumption in unitsThis guide will help you find the model that is right for you.fujitsu wall mounted ac units A room air conditioner's efficiency is measured by the energy efficiency ratio (EER). cost of split ac in chennaiThe EER is the ratio of the cooling capacity (in British thermal units [Btu] per hour) to the power input (in watts). Each increase of 1.0 on the EER scale represents a 10% increase in energy efficiency.

When buying a new room air conditioner, information about the EER can be found on the EnergyGuide label for the unit. Look for an EER of at least 12 and the ENERGY STAR label. Earning the ENERGY STAR means a product meets strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. The required cooling capacity for a room air conditioner depends on the size of the room being cooled. Room air conditioners generally have cooling capacities that range from 5,500 Btu per hour to 14,000 Btu per hour. Many people buy an air conditioner that is too large, thinking it will provide better cooling. However, an over-sized air conditioner is actually less effective — and wastes energy at the same time. A properly sized unit will remove humidity effectively as it cools.To figure out which size unit is best for your cooling needs, see the Air Conditioner Cooling Needs Calculator below. Verify that your home's electrical system can meet the unit's power requirements.

If you are mounting your air conditioner near the corner of a room, look for a unit that can direct its airflow in the desired direction for your room layout. If you need to mount the air conditioner at the narrow end of a long room, look for models that have a “turbo” fan mode that can drive air further into the room. Other features to look for: For those that keep to a regular schedule and don't have smart home devices installed in their home, a timer will help save money (about $100 on the air conditioner itself and your energy bill) and save you from coming home to a hot, stuffy home. For many, though, the ability to control a room air conditioner from anywhere can be a huge help and cost savings, especially if you don't stick to a schedule. And, you can connect them to other smart home devices so they fit seamlessly into your daily routine. The Frigidaire FFRE0533S1 ($167.99 on Amazon), rated at 5,000BTU, gets high marks for its cooling and dehumidification capabilities of up to 1.1 pints per hour.

The unit, which has an EER of 12.2, two cooling and two fan speeds, a 24-hour programmable timer, built-in thermostat with digital temperature readout, remote control and a four-way adjustable vent to direct air flow. The Wi-Fi connected Frigidaire FGRC0844S1 Cool Connect ($296.99 on Amazon) delivers 8,000 BTUs, enough to cool a room up to 350 square feet, with an EER of 12.0. The unit has 3 fan speeds and 2-way slanted louvers that direct airflow in an upward, circular motion for even cooling. You can create a custom 24-hour schedule or control the unit remotely with the Frigidaire app for iOS and Android or dedicated remote control. If the power goes out, the unit will automatically restart when power is restored.  It has an air ionizer to help remove allergens, like pollen, and other impurities from the air and the magnetic front grill, which has an antibacterial filter, easily detaches for cleaning. A little planning before installing your air conditioner will save you money and energy.

The unit should be level when installed, so that the inside drainage system and other mechanisms operate efficiently. If possible, install the unit in a shaded spot on your home's north or east side. Direct sunshine on the unit's outdoor heat exchanger decreases efficiency by as much as 10%. You can plant trees and shrubs to shade the air conditioner, but do not block the airflow. Don't place lamps or televisions near your air-conditioner's thermostat. The thermostat senses heat from these appliances, which can cause the air conditioner to run longer than necessary. Set your air conditioner's thermostat as high as is comfortably possible in the summer. The less difference between the indoor and outdoor temperatures, the lower your overall cooling bill will be. Don't set your thermostat at a colder setting than normal when you turn on your air conditioner; it will not cool your home any faster and could result in excessive cooling and unnecessary expense. Set the fan speed on high, except on very humid days.