How many tons of air conditioning is this DX or Chilled Water coil?
Mar 26, · The cubic foot per minute, or cfm, per ton of air conditioning varies depending on application. Approximately cfm is required for normal use, while cfm is needed for high sensible heat situations. High latent heat loads use cfm. Sensible heat directly affects the temperature of the room, while latent heat does not affect temperature because it causes a change in state. Feb 10, · If you’re not an HVAC tech it can be difficult to know what size or tonnage system is needed for your home or desired space. The rule of thumb for cooling is CFM per ton or 1 CFM per tons. Whether you’re installing a system in a new home for the first time or upgrading your home’s old system, it is important to be aware of how many square feet the space that you’re trying to cool is.
Residential air conditioner units come between one and five tons, which is sufficient enough to cool to square feet respectively. You figure out what tonnage system you need by dividing the total square footage of the space by Having too many tons for the space or having convitioning little tonnage to cool the space both have their drawbacks.
One would think that having over the recommended amount of ton of cooling for their specific area could only be a good thing but when it comes to HVAC units this is not the case. The problem with having excess tonnage is that it actually cools the air down faster than desired.
Excess humidity can cause general discomfort for the people in your hw, as well as present legitimate health concerns in the form of mold and mildew growth. It can also cause your space to tn warmer than it actually is which can lead to the prolonged running of your system and higher energy costs.
Commercial air conditioning units do come in larger tonnage sizes due to the as to be expected increased square footage. Commercial air conditioners can come in as many as ton crm.
The same rule of thumb can be applied to figuring out the required tonnage for a commercial unit that can be applied to residential units, which is that of square feet per ton. The important thing to remember when you are trying to figure out what tonnage system is appropriate for your toh space, be it residential or commercial, is that you can pee 1 ton to be able to cool up to square foot of space. Condigioning square how do i sign into my verizon account per ton of cooling needs to be near exact because having too much, or too little tonnage can cause increased energy bills, increased xfm temperature and discomfort, and even present peg health concerns.
If you have any questions what are the jewish symbols not hesitate to consult with a licensed HVAC technician in your area. Residential Units Residential air conditioner units come between one and five tons, which is sufficient enough to cool to square feet respectively. Excess Tonnage One would think that having over the recommended amount of ton of cooling for their specific area could only be a good thing but when it comes to HVAC units this is not the case.
Commercial Units Commercial air conditioning units do come in larger tonnage sizes due to the as to be expected increased square footage. Conclusion The important thing to remember when you are trying to figure out what tonnage system is appropriate for your desired space, be it residential what are the characters in transformers 3 commercial, is that you can expect 1 ton to be able to cool up to square foot of space.
The 1.7X rule
sq ft per ton. If you need a ROUGH estimate on how much comfort cooling a commercial building needs, this is a good place to start. The cooling requirements depend on many factors (insulation, population density, window type, internal equipment, lighting, etc), so use this rule of thumb carefully. cfm per ton for makeup air (DOAS). Units are measured from 1 ton to 5 ton in residental applications. Commerical systems go much larger. 1 ton of cooling is equal to cubic feet of air per minute. 2 ton of cooling is cfm and so on. So a 4 ton unit will have cubic feet of air passing through the system every minute. Divide the total BTU requirements for the room by 30 to obtain the necessary CFM requirements. You need 1 CFM for every 30 BTU in a room.
Here are a few that you may not have used before and could prove to be useful! This rule of thumb states that the MAX heating capacity required for your comfort cooling application is 1. For example, if the cooling required is 30 tons , btus , then the MAX heating capacity required would be , btus 1.
This assumes no lighting, no people, no internal heat gain, and a degF ambient design temperature. The heating requirement could be more, though it is extremely rare. If you need a ROUGH estimate on how much comfort cooling a commercial building needs, this is a good place to start.
The cooling requirements depend on many factors insulation, population density, window type, internal equipment, lighting, etc , so use this rule of thumb carefully.
For example, a 15, cfm makeup air unit with cooling or a DOAS unit , would require roughly tons of cooling. This is a handy rule of thumb for estimating the cooling load for a densely populated area, like an auditorium, gymnasium or sanctuary. For example, if an auditorium will have up to people at maximum capacity, the cooling load would be close to 40 tons x 0.
If the space is insulated well, this rule of thumb reduces a bit to 0. Just like all rules of thumb, this is just a place to start, and will heavily depend on insulation factors and heat generating equipment. In reality, most commercial buildings offices, retail, schools are probably closer to btuh per square foot, but warehouses or areas with more ventilation could require btuh per square ft or sometimes even more!
This also depends where in the country or world you are. In the midwest this is a good rule of thumb. If you are in southern California, or in the arctic circle, this rule of thumb is not so helpful. If you need to quickly determine how much cfm you need to deliver to a space, this is a great place to start.
In spaces that are more density populated, like conference rooms, gymnasiums or auditoriums, the space may require closer to 2 cfm per sq ft or sometimes more! Register now to receive HVAC design and application tips that are not brand specific, delivered approximately twice per month. Author Recent Posts. Connect on:. Brad Telker.
Brad was born and raised in St Louis Missouri, where he spent the first 18 years of his life. Brad joined the cfm team in , and now as the Vice President of Commercial Sales, he focuses on business development, as well as helping contractors and engineers find creative and unique solutions to any size project. Latest posts by Brad Telker see all. Search for: Search. Training Events. Latest Posts. Envelope Icon small picture of an envelope signifying email 0.