How to calculate central air conditioning
The calculation of central air conditioning involves multiple key parameters, including cooling capacity, energy efficiency ratio, installation area, etc. The following are hot topics and structured data on central air conditioning calculations in the past 10 days across the Internet to help users quickly grasp the core points.
1. Calculation of cooling capacity of central air conditioning
Cooling capacity is the core indicator for selecting a central air conditioner, usually in units of "horsepower" or "kilowatt (kW)". The calculation formula is as follows:
| Room area (㎡) | Required cooling capacity per square meter (W/㎡) | Total cooling capacity (kW) |
|---|---|---|
| 10-15 | 160-200 | 1.6-3.0 |
| 15-20 | 150-180 | 2.25-3.6 |
| 20-30 | 130-160 | 2.6-4.8 |
2. Calculation of energy efficiency ratio (EER/COP)
The energy efficiency ratio reflects the energy saving of the air conditioner. The higher the value, the more energy it saves. Calculation formula:
| Type | Energy efficiency ratio range | Energy saving level |
|---|---|---|
| Fixed frequency central air conditioner | 3.0-3.6 | Level 3 energy efficiency |
| Inverter central air conditioner | 4.0-5.0 | Level 1 energy efficiency |
3. Installation cost and operating cost estimation
The initial installation cost and long-term electricity bill of central air conditioning are the focus of users' attention:
| Project | Cost range (yuan) | Remarks |
|---|---|---|
| Equipment cost (per square meter) | 300-800 | Brands/models vary greatly |
| Installation fee | 5000-20000 | Including piping/labor |
| Average monthly electricity bill (100㎡) | 400-1000 | Average daily use: 8 hours |
4. Performance comparison of popular brands
According to recent e-commerce platform data, the key parameters of mainstream brands are as follows:
| brand | Cooling capacity range (kW) | Energy efficiency ratio | Price range (10,000 yuan) |
|---|---|---|---|
| Gree | 3.5-28 | 4.2-4.8 | 2.5-8 |
| Beautiful | 3.0-25 | 4.0-4.5 | 2.0-7 |
| Daikin | 4.0-30 | 4.5-5.0 | 3.0-10 |
5. Answers to users’ high-frequency questions
1.How to calculate central air conditioning needs for multiple rooms?
It is necessary to add up the cooling capacity corresponding to each room area, and then add 10%-15% redundancy.
2.How to adjust the calculation if the floor height exceeds 3 meters?
For every 0.5 meter increase in floor height, the cooling capacity needs to increase by 5%-8%.
3.How to choose a Western-style room?
It is recommended to calculate the cooling capacity at 1.2 times the standard value.
Summary:The calculation of central air conditioners needs to take into account factors such as area, energy efficiency, budget, etc. It is recommended to give priority to frequency conversion first-class energy efficiency products and reserve 10%-20% of cooling capacity redundancy to deal with extreme weather.
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