What is the powerful function of air tightness of doors and windows?

According to the location and function of the building, different forces will act on the periphery of the building, so if the air tightness is insufficient, the wind pressure or indoor temperature will leak outward or inward from the unsealed part, so good air tightness and natural thermal insulation performance are good.

2, air tightness = moistureproof

Good air tightness has a certain protective effect on existing building structures. If the air tightness is not good, wet weather will easily lead to indoor water leakage, so if the air tightness is good, the southern partners basically don't have to worry about returning to Nantian.

3, air tightness = fire prevention

Often the most life-threatening thing in a fire is the smoke released during the fire, so it can be effectively prevented if the indoor sealing is enough. Therefore, air tightness can play a barrier role to a certain extent.

4. Airtightness = Comfort

Comfort is a person's comfortable feeling about the surrounding environment, so if the air tightness is good enough, the indoor environment will naturally be more comfortable.