Before there were electric air conditioners, people used large blocks of ice to cool their homes and businesses. The ice absorbed heat and melted slowly as it warmed up. The use of tons to measure cooling capacity dates back to this period. A ton refers to the amount of heat needed to completely melt a ton of ice. Melting this amount of ice requires 286,000 Btu (British thermal units). If you`re wondering how many tons of heating or cooling your commercial business needs, we have some good news: you don`t have to worry about it when it comes to installing or replacing equipment. This is a job for professionals who have special training in the “size” of HVAC equipment for many different types of parts. If you own or operate a small business and are looking for new HVAC equipment, all you have to do is contact our light commercial vehicle experts. They perform a “special calculation of the heat load” to determine the correct tonnage required for comfort and energy savings. For the intrepid, if you want to read a fun HVAC joke on the subject, check out this thread on the HVAC Talk forum.
And if you discover what the “heat of zaporization” is, let me know! One piece of HVAC jargon that people have a hard time understanding is tonnage. This is an important part of the installation and replacement of new air conditioners. While you can always count on our experts to do the best job of installing air conditioners so you get the perfect new air conditioner, we`d like to tell you a bit about what tonnage means and how it fits into the installation process. The more efficient your cooling system is, the less energy it takes to cool your home. When it comes to SEER ratings, the higher the SEER rating, the greater the energy efficiency, which also means lower energy costs. The thing to know is that while it may seem logical to assume that the higher or the higher the SEER and the tons, the better – maybe that`s not always the case. As an example, most systems with higher SEERs lose cooling power faster at higher outdoor temperatures because they have smaller compressors, which means that the higher SEER may not provide greater cooling comfort on a really hot day. What does it mean if you install a 3-ton air conditioner? Is it the weight of the air conditioner? Is it the cooling capacity? Why does it weigh in tons? The cooling capacity of the air conditioning system is measured in the heat units that a system removes from the air. An air conditioner does not produce “cold” because cold is not really a form of energy; This is the result of the elimination of heat. And tonnage is the amount of heat an air conditioner can extract from a home for more than an hour. Heat dissipation is measured in BTU (British Thermal Units), which is the amount of heat needed to change the temperature of a pound of water by one degree.
One ton of air conditioning power means a system that removes 12,000 BTUs per hour from a building`s air. Each additional tonne represents an additional 12,000 BTUs. One can have many questions related to the weight or tonnage of the air conditioner. Let`s try to see what this value really means. Nominal capacity refers to the capacity of the air conditioner, which manufacturers claim their product has when they sell it. This is also called the capacity of the nameplate. This is the number you`ll find on your product, or the one a sales manager will use while telling you about air conditioning capacity and features. But this does not mean that 3 tons, for example, is the actual cooling capacity of the air conditioner. Yes, it sounds strange.
But there`s a reason for that, and the reason why 12,000 BTUs were selected as the base unit for measuring heat: 12,000 BTUs is the amount of heat needed to melt a ton of ice at 32°F in 24 hours. This measure was established by the American Society of Refrigerating Engineers at the turn of the century, and we still use it. (With the exception of small appliances such as window air conditioners, which are only fractions of a ton.) OK, so people cooled and cooled with ice. How does this equate to BTU air conditioning capacity per hour, you ask? Well, let`s be quantitative and find out. Air conditioning capacity is one of the most important factors to understand when choosing a new cooling system for your Home in Texas. You probably already know that your air conditioner doesn`t weigh several tons, so using this measure may seem a bit illogical. In fact, the use of tons to measure air conditioning capacity is not so much a conscious decision as historical practices. For example, a 3-ton air conditioner doesn`t really weigh 3 tons. This means that it has a nominal capacity of 36,000 BTU/h. While there is no set range for SEER ratings as the maximum range increases and modern cooling systems become even more efficient, it is important to pay attention to certain levels. For example, the minimum SEER rating allowed today is 13, but if you have an older system, there`s a good chance the rating is 10 or less (and could even be as low as 6). The most efficient SEER ratings of air conditioners are in the order of 20+.
When the ice is below freezing and absorbs heat, the temperature rises. When ice is at its melting point of 32°F and absorbs heat, its temperature does not change. Instead, it melts. If you`ve had a physics or chemistry class, you may remember that the amount of heat needed to melt ice No, tonnage has nothing to do with the weight of an air conditioner! (Although we understand why people might make this mistake.) HVAC technicians, like most specialists in complex fields, have their own jargon, and when they talk about tonnage, they mean the amount of cooling an air conditioning unit provides for a room. Very interesting! Thank you very much. Very interesting! Thank you. Which I have a hard time understanding. and maybe it`s because I haven`t read precisely enough or I just don`t have the brain capacity to understand it. but why, if the whole thing came from a ton of ice that melted in 24 hours. what would mean 12,000 BTUs per hour, do we refer to a tonne of HVAC capacity as just 12,000 BTUs and not 188,000 BTUs where the tonne of ice is? The cooling capacity of the air conditioning system is described in “tons”. One ton means the rate of heat transfer needed to freeze a ton of water in 24 hours.
This corresponds to 12,000 Btu/h. The confusion here is quite natural. HVAC and home energy professionals find this story funny, because when you say that an air conditioner weighs 4 tons, we know it`s not about weight. This is a number that indicates how much heat the air conditioner can remove from the house in an hour. (Let`s ignore the problems of nominal capacity versus actual capacity and AHRI depreciation.) A 4-ton air conditioner is one that can remove 48,000 BTUs of heat per hour from the house. However, for most people, 4 tons means 8000 pounds. (A BTU is a British thermal unit, about the amount of heat you get from burning a kitchen match.) If you look at a small window air conditioner, you will see BTUs listed on it: This is the amount of BTUs that the air conditioner can remove from a room over an hour. Most window air conditioners can remove about 5,000 to 6,000 BTUs per hour. But if you start switching to a larger system than window air conditioners, you`ll be dealing with extremely large numbers.
For example, a standard light commercial air conditioner can remove 240,000 BTUs per hour. Air conditioners work like blocks of ice, as they do not produce fresh air, but remove heat from the building. The capacity of an air conditioner refers to the amount of heat it can dissipate. If you round 11,917 Btu/h, you get 12,000 Btu/h, which is equivalent to one ton of air conditioning capacity. This is where the bin appears: it`s a simpler measure than using the smaller BTU. One tonne is equivalent to 12,000 BTUs withdrawn per hour. Residential air conditioning systems are between 1 and 5 tons. Up to 25 tons is light commercial and anything above is considered a heavy commercial or industrial system.
It takes an experienced HVAC professional to install a new air conditioner, especially in urgent conditions. It`s important to have the right type of air conditioner installed, and a big part of finding the right air conditioner is knowing the right tonnage. If you make arrangements with our technicians to replace the air conditioner in Shreveport, LA or the surrounding area, we will carefully size your air conditioner to make sure it has the right tonnage: not too small, not too big, but just right. (It turns out that the goldilocks were after something! Maybe she should have trained as an HVAC installer with us instead of walking around the homes of foreign mammals.) The average residential air conditioning system is between 1.5 and 5 tons. To find the right tonnage air conditioner for sufficient cooling, the air conditioning must be sized by professionals. It`s easy to make the mistake of believing that the more powerful an air conditioner is, the better. But you don`t want 5-ton air conditioning if your home only needs 2 tons of cooling per hour. .