Passive House buildings need very little energy to achieve a comfortable temperature all year round - both in cold and in hot seasons. An extremely well insulated building envelope as well as triple glazed windows ¹⁾ and insulated frames keep the desired warmth in and undesirable heat out.

The follwing articles on Passipedia contain more information around the topic of thermal comfort:

Comfort in Passive House buildings

Thermal comfort parameters

Comfort criteria according to international standards especially for use in Passive Houses

Adaptive versus Heat Balance Comfort Models

Local thermal comfort in Passive House buildings

Summer comfort

Summer comfort in Passive Houses

Well-insulated Passive House windows improve comfort dramatically by keeping average inside surface temperatures above 17°C, even under the coldest of outdoor conditions. This, of course, also helps to prevent condensation and mould growth.

Infrared image of a Passive House window from the inside.
All surfaces (window frame, casements, and glazing) are
pleasantly warm (above 17 °C). The temperature doesn't fall
below 15 °C even at the glass edge.
Learn more about Local thermal comfort in Passive House buildings