What is overheated period?
The term ‘overheating’ refers to discomfort to occupants caused by the accumulation of warmth within a building. CIBSE define overheating as: ‘conditions when the comfortable internal temperature threshold of 28°C is surpassed for over 1% of the time.
What are the effects of excessive heat in a building?
Excessive heat can lead to paint damage on the exterior of your home. Look for bubbling, chipping, and flaking paint after a stretch of extreme temperatures. This damage can cause openings that lead to moisture and potentially, mold issues inside your home.
How is shading device calculated?
To calculate the depth (d) of the horizontal shading device, multiply the obtained ratio (d/h) by the needed shading height (h). To calculate the protrusion (p) of the horizontal shading device, multiply the obtained ratio (p/h) by the needed shading height (h) for the selected hours (cut-off times).
Is the overheating a design issue at Passivhaus?
Overheating is a key design issue and should be addressed from the beginning as an integral part of the Passivhaus design process. But how? This blog post is a simple guide to preventing Passivhaus overheating by design. Overheating is a serious issue that has come to prominence in recent times.
Which is the best way to design out overheating?
When it comes to designing out overheating, facing south or close to it is best. In winter, the maximum beneficial solar gains are from the south. In summer, however, the greater risk of overheating is from the lower sun in the east and west.
Where is the greatest risk of overheating in winter?
In winter, the maximum beneficial solar gains are from the south. In summer, however, the greater risk of overheating is from the lower sun in the east and west. Midday sun coming from the south is very high and therefore presents less risk and is easier to shade against.
What makes a building more likely to overheat?
Most buildings will have some inherent shading from the overhead sun provided by roof overhangs and window reveals. Buildings that face more west or east will have a greater risk of excess solar gain and present more challenges to shade adequately. 2. Don’t try to heat the building with the windows