Coolex FAQs

Please find below a list of frequently asked questions by other customers. If your question is not answered there then please feel free to contact customer services using the Support form.

Air-Conditioning is defined as a process which cools (or heats), cleans circulates and freshens air and controls its moisture content simultaneously.

on Sunday May 21 by Super User

Any heat generated within the space to be air conditioned forms a “load” on the air conditioning system.
Examples of of “heat generators” within a space are,

  • People
  • Computers
  • Lights and Fans
  • Photocopiers
  • Voltage Stabilzers
  • TVs and so on.

Heat also enters the enclosed space from outside. Such heat is also significant load on air conditioning system. Heat from outside can be through:

  • Walls
  • Roof
  • Glass (windows/glazing)
  • Open doors and so on

When an air conditioning system is planned, the planning engineer takes into consideration all possible sources of heat in the space, and calculates the required capacity (tonnage) of the air conditioner.

on Sunday May 21 by Super User

Increased efficiency, reliability, and control of your home’s indoor environment are the main reasons for choosing a new Coolex heating and air conditioning system.

Coolex High Efficiency Package Next Generation Units (PNG) are designed specifically for operating with high performance in hot & dry climatic conditions, lower power consumption, easy installation and low noise operations. Coolex’s PNG Units are designed to operate at severe ambient temperature up to 52° C without tripping.

Quality and efficiency make Coolex Air-Cooled Package Units the preferred choice for DX cooling systems in Residential, Commercial and Industrial applications.

For more information please contact Coolex.

on Sunday May 21 by Super User

Who else can guide you better than Coolex? We will consider many factors before making a recommendation. The only accurate way to determine the correct capacity of heating and air conditioning equipment for your home is to have a load calculation performed on your home. There is a specific method by which Coolex Engineers to do this calculation. This will give them the heat gain and heat loss design data for your home. These figures can then be used to select the appropriately sized air conditioning or heating system for your home, based on equipment-performance data.

Many factors determine the size (capacity) system your home requires. Some of these are:

  • square feet to be cooled and heated
  • climate
  • humidity
  • number of windows
  • insulation factors
  • which direction your home faces
  • heat producing appliances, and
  • the number of people who will be in the home

Oversized air conditioning systems will not remove adequate moisture from the indoor air due to short cycling. Also, oversized systems quickly cool the indoor air temperature, but they do not run long enough to remove the humidity. That leaves you feeling stuffy and uncomfortable. Control of your home’s climate is rarely achieved with oversized systems and electricity consumption is higher than with a properly sized system.

An undersized air conditioning system will not adequately cool your home on the hottest days and an undersized furnace will not adequately heat your house on the coldest days.

Contact Coolex for a load calculation on your home and a recommendation of the best system to meet your family’s needs.

on Sunday May 21 by Super User

That depends. There are many factors that must be considered. These include:

  • The efficiency of the equipment.
  • The size of your home
  • Is the ductwork installed and in good condition?

In most cases, replacing your whole system, including both indoor and outdoor components, will result in a more efficient, longer-lasting system but will also cost a little more.

on Sunday May 21 by Super User

Yes. Coolex air conditioning and heating units are designed to operate as a complete, matched system. The efficiency rating is based on the entire system. Replacing the entire system ensures the system will be reliable and efficient.

on Sunday May 21 by Super User

The capacity in tons of a Coolex outdoor unit can be determined by dividing the number after PNG by 12. So if the model number is PNG 300 C2, then take 300 and divide by 12, equaling 25 tons.

This is only for Coolex PNG models. Other companies use a different method based on their model number nomenclature.

on Sunday May 21 by Super User

“Ton” or “Tons of Refrigeration (TR)” is a unit of refrigeration used to determine the capacity of Air Conditioning equipment. It is defined as the refrigerating effect that will be produced by melting 1 Ton of ice at 0°C in 24 hrs. Also one Ton of Refrigeration is defined as the energy removal rate that will freeze one short ton of water at 0 °C (32 °F) in one day. One ton of air conditioning is 12,000 Btus per hour. This means that a “one ton” air conditioning system has the capability of removing 12,000 Btus of heat per hour from your home.


Unit of Refrigeration:

In inch-pound (I-P) units, refrigeration is expressed in British thermal units per hour, or simply Btu/h. A British thermal unit is defined as the amount of heat energy required to raise the temperature of one pound of water one degree Fahrenheit from 59°F to 60°F; and 1 Btu/h = 0.293 watt (W).

Another unit of refrigeration widely used in the HVAC&R industry is ton of refrigeration, or simply ton. As mentioned before, 1 ton = 12,000 Btu/h of heat removed. This equals the heat absorbed by 1 ton (2000 lb) of ice melting at a temperature of 32°F over 24 h.


Because the heat of fusion of ice at 32°F is 144 Btu / lb, 1ton=1×2000×144 Btu/h

also 1 ton = 3.516 kW.

on Sunday May 21 by Super User

“Indoor Air Quality” (IAQ) refers to the nature of air within an inhabited, enclosed space with particular relevance to suspended particulate matter, dust, harmful biological contaminants, chemical vapours and odours present in it. In many large commercial conditioned spaces, the occupants have virtually no control over their environment, i.e. they cannot open windows if the room feels stuffy and unaired, turn on the exhaust fans, or leave the room, if the space is filled with dust, tobacco smoke, chemical vapour from paints, pesticide sprays, fine carbon dust from copying machines, etc. Actually because of the above pollutants, it has been observed that indoor air in a conditioned space can be up to 10 times more polluted than outdoor air and may pose a health risk due to their high concentration. Therefore, IAQ assumes importance in conditioned places where we work (or live).


Nowadays, most corporate offices are housed in elegant buildings, with a predominant use of glass, and have centralized air-conditioning systems. Such architecture gives the offices a bright, attractive look. But the indoor air circulation is often far from perfect, and could be harmful to the health of the people working in such buildings.


People all over the world have major health problems due to poor indoor air quality. These problems are associated with symptoms that are particularly brought about by contamination of the indoor environment, by the growth bacteria, fungi, mold, viruses and mildew (collectively termed micro- organisms) spread through the circulation of air exhaled, as well as from food material, etc. These problems prevail in hospitals, institutional buildings, hotels and canteens.

on Sunday May 21 by Super User

Take this quiz to find out if you have air quality problems at home:

  1. Does the air in your home feel clammy or wet?
  2. Does your home overheat or get too cold?
  3. Does your home get stuffy?
  4. Do you suffer from indoor allergies?
  5. Do odors linger in the kitchen and other rooms?

Answering yes to one or more of these questions can be a sign of problems with the atmosphere and comfort of your home. Perhaps you need extra dehumidification to reduce moisture or sensitive filtration systems to clean mold spores from the air. Identifying air problems is the first step to finding a residential HVAC system that meets your needs.

on Sunday May 21 by Super User

Filter cleaning depends on the frequency of usage and the atmospheric conditions. For normal applications, it is recommended to clean the filter once in 15 days.

on Sunday May 21 by Super User
  • Providing a false ceiling (especially for Room Air conditioners/ Multi-split Air conditioners) reduces the volume to be cooled.
  • Providing curtains/ blinds /sun film on windows reduces heat input into the room.
  • Insulating the ceiling which is exposed to the sun with 50 mm thermocole drastically reduces heat input into the room.
on Sunday May 21 by Super User
  • Clean the filters regularly.
  • Keep doors and windows closed.
  • Pull the curtains over west facing windows to prevent direct sunlight entering the space.
  • Leave your thermostat at one setting.
  • Avoid increasing heat load.
  • Ensure proper input voltage.
on Sunday May 21 by Super User

Preferably auto. That way, the fan operates only when the temperature requires it. This is the most used and the most efficient setting. However, there are advantages to using the “on” setting. Air is constantly filtered through the unit’s air filter, and the constantly circulating air results in an even temperature throughout the house.

on Sunday May 21 by Super User

Yes. However, we recommend that plants be no closer than 18 inches to the unit. This allows for plenty of room for air circulation in and out of the unit. Without this room for air circulation, the unit could overheat, resulting in a premature need for service.

on Sunday May 21 by Super User

We recommend you to perform preventative maintenance before the winter heating season and before the summer cooling season. We offer service agreements that may include reduced rates on labor and parts and provide priority response. Service/maintenance agreements may include cleaning indoor and outdoor coils, tightening electrical connections, checking supply voltage and operating current, checking refrigerant charge, measuring temperature differential at supply and return registers, cleaning blower wheel and motor, inspecting and adjusting burner, checking heat exchangers, cleaning drain lines and pan, checking ductwork for leaks and insulation, and checking thermostat.

on Sunday May 21 by Super User

The average expected life of an air conditioner or a heat pump may be approximately 12-15 years. The average expected life of a gas furnace or air handler may be longer. Units in corrosive environments, such as, but not limited to coastal installations, will tend to have shorter lives.

on Sunday May 21 by Super User

The manufacturer’s warranty begins on the date of installation and lasts varying lengths of time depending on the type of unit installed. The warranty term can be found on the back cover of the installation manual for your unit. You can check with your installing contractor if you no longer have your installation manual. You will need to have the model and serial number of your unit, which can be found on the unit’s Data Plate.

on Sunday May 21 by Super User

The manufacturer’s warranty covers most mechanical parts. It does not include labor, refrigerant, shipping charges or a replacement unit. You may have an extended warranty that was purchased through a third-party insurer. Please check with your installing contractor for information on any extended warranties.

on Sunday May 21 by Super User

Where AC is used for human comfort, the ideal setting is 24°C (75.2°F). AC experts have determined that the comfort zone is between 20°C (68°F) to 25°C (77°F) with RH between 40% and 60%.

on Sunday May 21 by Super User

Digital Thermostats Offer Savings and Climate Control


Most thermostats are easy to use. A lot of people just crank up the dial when they want more heat, or drop it for a blast of cool air. But this method of heating and cooling wastes energy and money. You’re also less likely to get the temperature you need. The premiere home thermostat is digital, with touch- screen controls that are easy to read and more responsive than standard thermostats. These digital thermostats allow you to pre-set temperatures for every day of the week to match your schedule. You avoid high-energy temperature swings as you enter and leave the house.

on Sunday May 21 by Super User

Ask your HVAC contractor to check your heating and cooling system annually. It’s a good idea to schedule an appointment in the spring or fall, ahead of peak seasons for running HVAC systems. Summers and winters also are peak times for HVAC contractors to work, and their schedules fill fast. The following is a thorough list for an HVAC system checkup:

  • Check thermostat settings.
  • Review electrical connections and measure voltage and current on motors.
  • Lubricate all moving parts.
  • Check and clean the drain.
  • Make sure the system starts and shuts off properly.
  • Clean air conditioning coils.
  • Check and refresh refrigerant levels.
  • Clean blower parts.
  • Check all gas (or oil) connections.
  • Clean or change air filters.
on Sunday May 21 by Super User
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