Views: 0 Author: Guangdong Rolansini Home Furnishing Technology Co., Ltd. Publish Time: 2025-02-03 Origin: https://www.rolansini-windows.com/
When purchasing doors and windows, we will see some performance parameters, such as air tightness level 8, water tightness level 6. Many homeowners may wonder, does a wind pressure resistance rating of 9 mean that it can withstand a level 9 typhoon? How sealed is level 8 airtightness?
High performance doors and windows can greatly enhance the comfort of the home environment, withstand typhoons, provide cold and heat insulation, waterproof and dustproof The long-term implementation of these functions depends on the performance of the doors and windows. The performance of doors and windows includes wind pressure resistance, insulation, air tightness, water tightness, sound insulation, and other aspects, which involve many physical calculations. The complex and unfamiliar calculation units can make people confused. Classifying the performance data of doors and windows can help us easily determine the level of their performance.
Wind resistance performance
Grade | Grading indicator P3 | Wind resistance capability |
1 | 1.0≤P3＜1.5 | weak ↓ strong |
2 | 1.5≤P3＜2.0 | |
3 | 2.0≤P3＜2.5 | |
4 | 2.5≤P3＜3.0 | |
5 | 3.0≤P3＜3.5 | |
6 | 3.5≤P3＜4.0 | |
7 | 4.0≤P3＜4.5 | |
8 | 4.5≤P3＜5.0 | |
9 | P3≥5.0 |
(Index value unit: kilopascals. Data excerpted from "Classification and Testing Methods for Airtightness, Watertightness, and Wind Load Resistance Performance of Building External Doors and Windows".)
Wind resistance performance refers to the ability of closed external windows (doors) to remain undamaged and functional under wind pressure. The wind resistance performance is divided into 9 levels, and the higher the level, the stronger the wind resistance ability. It is worth noting that the wind pressure resistance performance level is not equivalent to the typhoon level. A wind pressure resistance rating of 9 indicates that the window can withstand wind pressures of over 5000pa and easily withstand highly destructive Category 12 hurricanes.
Thermal insulating property
Grade | Grading indicators | Thermal insulation performance |
1 | K≥5.0 | weak ↓ strong |
2 | 5.0＞K≥4.0 | |
3 | 4.0＞K≥3.5 | |
4 | 3.5＞K≥3.0 | |
5 | 3.0＞K≥2.5 | |
6 | 2.5＞K≥2.0 | |
7 | 2.0＞K≥1.6 | |
8 | 1.6＞K≥1.3 | |
9 | 1.3＞K≥1.1 | |
10 | K＜1.1 |
(Indicator value unit: w/㎡· K.). The data is excerpted from "Classification and Testing Methods for Thermal Insulation Performance of Building External Doors and Windows"
The insulation of doors and windows refers to the ability of the window impedance to transfer heat from the high temperature side to the low temperature side under the condition of an air temperature difference on both sides of the window. The insulation performance is divided into 10 levels. The higher the level, the smaller the K value, the better the insulation performance, and the better the energy-saving and environmental protection effect. Taking a 90 square meter house in Guangzhou as an example, assuming that the air conditioning is on for 4 months, the most obvious difference between doors and windows with an insulation coefficient of 1.3 W/m2 · K and those with an insulation coefficient of 6.5 W/m2 · K is that they can save nearly 600 kWh of electricity.
Air tightness
Grade | Grading indicator q1 | Grading indicator q2 | Air tightness |
1 | 4.0≥q1＞3.5 | 12.0≥q2＞10.5 | weak ↓ strong |
2 | 3.5≥q1＞3.0 | 10.5≥q2＞9.0 | |
3 | 3.0≥q1＞2.5 | 9.0≥q2＞7.5 | |
4 | 2.5≥q1＞2.0 | 7.5≥q2＞6.0 | |
5 | 2.0≥q1＞1.5 | 6.0≥q2＞4.5 | |
6 | 1.5≥q1＞1.0 | 4.5≥q2＞3.0 | |
7 | 1.0≥q1＞0.5 | 3.0≥q2＞1.5 | |
8 | q1≤0.5 | q2≤1.5 |
(Indicator value unit: q1[m3/(m·h)]； q2/[m3/(m2·h)]。 The data is excerpted from "Classification and Testing Methods for Airtightness, Watertightness, and Wind Load Resistance Performance of Building External Doors and Windows"
Airtightness refers to the ability of external windows (doors) to prevent air infiltration when in a normally closed state. The airtightness performance of external windows is directly related to the heat loss caused by cold air infiltration. There are 8 levels of airtightness, and the higher the level, the smaller the heat loss and the better the airtightness. Good airtightness is beneficial for energy conservation and environmental protection.
Water tightness
Grade | Grading indicators | Water tightness |
1 | 100≤△P＜150 | weak ↓ strong |
2 | 150≤△P＜250 | |
3 | 250≤△P＜350 | |
4 | 350≤△P＜500 | |
5 | 500≤△P＜700 | |
6 | △P≥400 |
(Index value unit: Pa. Data excerpted from "Classification and Testing Methods for Airtightness, Watertightness, and Wind Load Resistance Performance of Building External Doors and Windows".)
The water tightness of doors and windows refers to the ability of external windows to prevent rainwater leakage under the simultaneous action of wind and rain when they are in a normal closed state. The water tightness of doors and windows is divided into 6 levels, and the higher the level, the stronger the waterproof performance. Doors and windows with good waterproof performance can effectively prevent rainwater from entering the internal structure of doors and windows, and the service life of doors and windows will also be longer.
Sound insulation performance
Grade | Grading indicators | Soundproofing performance |
1 | 20≤Rw+Ctr＜25 | weak ↓ strong |
2 | 25≤Rw+Ctr＜30 | |
3 | 30≤Rw+Ctr＜35 | |
4 | 35≤Rw+Ctr＜40 | |
5 | 40≤Rw+Ctr＜45 | |
6 | Rw+Ctr≥45 |
(Index value unit: decibels. Data excerpted from "Classification and Testing Methods for Air Sound Insulation Performance of Building Doors and Windows".)
The sound insulation performance of doors and windows refers to their ability to attenuate sound. The air sound insulation performance of doors and windows can be divided into 6 levels, and the higher the level, the better the sound insulation performance. Doors and windows with a sound insulation performance of level 6 can isolate sounds of over 45 decibels.
Anti theft performance
RC level | Using attack methods | Resist time | Anti theft performance |
RC1N | Using only one's own strength and simple tools | Within 1 minute | weak ↓ strong |
RC2N | Use simple tools such as screwdrivers, pliers, and wedges | 3 minutes | |
RC2 | The tool is the same as RC2N and is equipped with safety glass according to regulations | 3 minutes | |
RC3 | On the basis of the above tools, add two screwdrivers and a pry bar | 5 minutes | |
RC4 | On the basis of the above tools, add an electric drill and axe | 10 minutes | |
RC5 | On the basis of the above tools, add an electric drill, steel saw, and angle grinder | 15 minutes | |
RC6 | On the basis of the above tools, add high-power electric drills or steel saws and additional axes | 20 minutes |
(The above information is from the EN 1627-1630 standard)
According to the European anti-theft standard system, DIN EN 1627, which was implemented in 2011, defines the anti-theft requirements and grading for doors and windows, divided into 7 levels from RC1N to RC6. It is worth noting that police experts suggest that the anti-theft level of doors and windows in private residences should reach at least RC2 level to be safe.
