Beatrice Lang
With the extreme weather in Pakistan, air conditioners are in high demand, but their high cost and the subsequent electricity bills can be a concern for many. To reduce electricity consumption, it is important to choose an AC with a high energy efficiency ratio (EER) and a good energy star rating. Inverter ACs, such as the Gree Inverter AC, are known to use less electricity than non-inverter ACs. Additionally, certain modes like Eco mode can help save energy by adjusting the cooling cycle and preventing unnecessary energy wastage. Portable air conditioners like Coolzy are also an option, as they consume less electricity and do not require an exhaust hose. To further reduce electricity usage, it is recommended to set the temperature between 24-26°C, use ceiling fans, keep doors and windows closed, and regularly clean the filters.
Air Conditioners that Consume Less Electricity in Pakistan
| Characteristics | Values |
|---|---|
| Temperature Setting | 24-26°C |
| Ceiling Fans | Use alongside the AC to distribute cool air more effectively |
| Doors and Windows | Keep closed to maintain the desired temperature |
| Air Conditioner Filters | Regularly clean to improve efficiency |
| Energy Star Rating | Choose an AC with a high rating |
| Eco Mode | Optimizes power consumption by adjusting the cooling cycle |
| Dry Mode | Removes excess humidity from the air |
| Inverter ACs | Use less electricity than non-inverter ACs |
| Coolzy | Portable AC that uses very little electricity (340 Watts) |
| Coolzy-Pro with Igloo Tent | Provides the same comfort as a split AC with 80-90% less electricity cost |
| Kenwood 1866s Onyx | Local model with the highest EER rating of 4.0 |
| Midea 1.5 Ton | Offers good value for money with an EER rating of 3.6 |
| Gree Inverter AC | Has a low power consumption compared to other AC brands |
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What You'll Learn
Inverter ACs vs non-inverter ACs
Inverter air conditioners are more energy-efficient than non-inverter air conditioners. They can adjust their power consumption depending on the temperature outside and the number of people in a room. Inverter ACs have a variable speed compressor, which allows them to regulate the compressor's motor speed to maintain the desired temperature. This means they can maintain an optimal temperature throughout the day, even when there are extreme fluctuations in outside temperature. This also makes inverter ACs quieter than non-inverters, as they don't need to switch on and off as often. Inverter ACs are also better at dehumidifying the air, which is important in high-humidity areas.
Non-inverter ACs, on the other hand, work on a simple on-and-off mechanism. They turn on to cool the room and then turn off once the desired temperature is achieved. This uses more energy and can result in more wear and tear on the system. Non-inverter ACs have a fixed-speed compressor, which operates at full capacity when the room temperature rises above the set level. Once the desired temperature is achieved, the compressor shuts off completely, and this cycle repeats continuously, leading to frequent power fluctuations.
Inverter ACs typically cost more upfront but save money on electricity bills over time. Non-inverter ACs are usually less expensive to buy but have higher electricity consumption, making them more expensive to operate.
There are several practices that can be adopted to lower energy usage and save on electricity bills, regardless of the type of AC you own. These include setting the temperature to 24-26°C, using ceiling fans to distribute cool air more effectively, keeping doors and windows closed, and regularly cleaning the filters.
In summary, inverter ACs are more energy-efficient, provide better temperature control, and are quieter than non-inverter ACs. Non-inverter ACs are typically cheaper to buy but more expensive to operate due to their higher energy consumption. The choice between the two depends on your requirements, budget, and usage.
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Eco mode
The Eco mode on air conditioners is designed to reduce energy consumption and save costs. It is one of the best energy-saving features available in modern air conditioners.
In Eco mode, the air conditioner operates by regulating compressor speed and fan settings. The compressor, which is responsible for cooling the air, is turned off while the fan continues to run. The fan blows air across the coils, which retain their cool temperature, and into the room, thereby cooling the room without running the compressor. This adaptive functioning significantly lowers overall energy usage and reduces electricity bills.
Additionally, the Eco mode helps remove excess humidity from the air, making it useful in humid conditions where moisture can make the room feel warmer.
It is important to note that in extremely hot, cold, or humid areas, the Eco mode might struggle to lower the temperature or humidity quickly. In such cases, it is recommended to disable the mode temporarily and activate it when the room temperature nears the desired level.
To further enhance energy efficiency and cost savings, it is advisable to regularly maintain the AC unit, improve home insulation, and invest in smart thermostats for precise temperature control.
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Energy Efficiency Ratio (EER)
When it comes to air conditioning, energy efficiency is a key concern, especially in Pakistan, where temperatures can soar. The Energy Efficiency Ratio (EER) is a vital metric that helps consumers and HVAC professionals understand how efficiently a cooling system operates.
The EER is a standardised way to measure the energy efficiency of air conditioning systems. It calculates the ratio of cooling output to electrical input under standard conditions. The cooling output is measured in British Thermal Units (BTUs), while the electrical input is measured in watts. The higher the EER number, the more energy-efficient the system.
EER2: An Updated Metric
The HVAC industry now uses an updated version of the EER called EER2. This newer metric was introduced to reflect modern testing protocols and environmental realities. EER2 is calculated under more realistic conditions, with outdoor temperatures of 95°F, indoor temperatures of 80°F, and relative humidity at 50%. This updated testing environment provides a more accurate representation of real-world usage.
Benefits of Choosing a High EER2 System
Selecting an air conditioning system with a high EER2 rating offers several advantages:
- Energy Cost Savings: High EER2 systems consume less power, leading to lower monthly electricity bills.
- Reduced Environmental Impact: Lower energy consumption means reduced greenhouse gas emissions, contributing to eco-friendly living.
- Enhanced Comfort: High-efficiency systems maintain consistent indoor comfort, even during extreme temperatures.
- Improved Performance: A high EER indicates that the system can effectively remove heat, resulting in improved cooling performance.
Optimising EER2 Performance
To get the most out of your air conditioning system, consider the following:
- Home Size and Climate: Match your system to your home's size and the local climate.
- Energy Consumption and Budget: Balance energy efficiency with your budgetary constraints.
- ENERGY STAR Certification: Look for ENERGY STAR-certified products, as they meet strict energy efficiency guidelines.
- Regular Maintenance: Maintain your system with regular cleaning, annual tune-ups, and debris clearance for outdoor units.
Other Energy-Saving Tips for Air Conditioning
In addition to choosing a high EER2 system, you can adopt these practices to further reduce energy consumption:
- Moderate Temperature Setting: Set your AC to a moderate temperature, such as 24-26°C, to balance comfort and energy usage.
- Use Ceiling Fans: Ceiling fans help distribute cool air more effectively, reducing the burden on the AC.
- Close Doors and Windows: Prevent cool air from escaping to maintain the desired temperature without overworking the AC.
- Clean Filters: Regularly clean or replace air filters to improve airflow and system efficiency.
- Eco Mode: Utilise the Eco mode, which optimises power consumption by adjusting the cooling cycle and preventing unnecessary energy wastage.
By considering the EER2 rating and adopting energy-saving practices, you can enjoy a comfortable environment while minimising electricity consumption and costs.
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Coolzy portable AC
While there is no specific information about Pakistan, there are some general tips for reducing electricity consumption when using air conditioning. Firstly, setting the temperature to 24-26°C can ensure efficient cooling without using excessive power. Using ceiling fans in conjunction with air conditioning can also help distribute cool air more effectively, reducing the burden on the AC unit.
Coolzy markets its portable AC as the most energy-efficient option on the market, using around one-fifth of the electricity of a normal portable air conditioner. It achieves this by focusing on cooling the person, rather than the entire room. This also makes it quieter and more compact than other portable AC units. Coolzy is also easy to install and move between rooms, requiring no permanent installation. Its small size means it can be easily stored when not in use, and it can be used in large rooms or well-ventilated areas without a hose.
However, some users have disputed these claims, stating that the Coolzy is not much different from buying any 4000 BTU unit and not venting it. They also claim that it needs to be vented to cool the room effectively, and without this, it will increase the temperature of the room.
Coolzy's website provides instructions on how to vent the portable AC without a window, by using a sliding door, a drop ceiling, or a wall vent kit.
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Ceiling fans
While running an air conditioner, it is recommended to use ceiling fans to distribute cool air more effectively, reducing the workload on the air conditioner and, consequently, lowering power consumption.
Some energy-saving ceiling fans available in Pakistan are:
Khurshid AC-DC Inverter Hybrid Ceiling Fans
Khurshid AC-DC Inverter Ceiling Fans are equipped with a highly efficient BLDC motor that consumes only 50W at the highest speed. These fans are designed to ensure minimal power consumption and are priced between Rs. 9900 and Rs. 24000.
Royal Energy Saver Ceiling Fans
Royal Energy Saver Ceiling Fans are designed with energy conservation in mind. They are crafted with Electrical Steel Sheet and 99.99% pure copper wire to ensure optimal electrical efficiency. These fans are manufactured using high-quality materials and come with a lifetime guarantee.
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Frequently asked questions
Kenwood 1838S and TCL T5 inverter ACs are the top choices for energy efficiency in Pakistan. They use a variable-speed compressor that adjusts the motor speed to regulate cooling or heating output. Other energy-efficient options include Gree, Dawlance, Haier, and Mitsubishi air conditioners.
The Energy Efficiency Ratio (EER) is the key benchmark to compare the energy efficiency of different AC models. The higher the EER, the more efficient the AC. Additionally, look for features like eco mode, dry mode, and adjustable temperature settings, as they can help reduce power consumption.
Coolzy is a portable AC option that consumes significantly less electricity than traditional portable air conditioners. It uses around 1/5 of the electricity and has the lowest running cost of any AC in Pakistan. It is designed specifically for Pakistan's extreme summer heat.
Regardless of the type of AC you own, you can follow these practices to lower energy usage:
- Set the temperature to 24-26°C for efficient cooling without excessive power consumption.
- Use ceiling fans along with the AC to distribute cool air more effectively.
- Keep doors and windows closed to maintain the desired temperature without overworking the AC.
- Regularly clean the filters to improve airflow and efficiency.
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