适当的温度和相对湿度水平对于保持良好的空气质量和人员舒适度非常重要。不正确的相对湿度设置会对任何建筑物造成各种问题，如细菌，病毒，尘螨和霉菌生长。
由于高相对湿度的冷凝，霉菌可以在周边壁内生长。这通常是一个隐藏的问题，可能不会显示表面实际的霉菌生长。然而，空气霉菌孢子可能开始对乘员的健康和舒适性产生负面影响。
室内湿度升高可能是室内通风不畅或交换不良的指标。洗手间，炊事设施不当或使用不当的加湿器会导致相对湿度升高，导致霉菌和细菌问题。
低湿度水平通常是在加拿大冬季室外湿度比10%还要低的结果。
整个一年的湿度水平应该在适当的季节进行管理。通常，ASHRAE室内空气质量标准62-2001规定如下：
冬季：
冬季RH水平保持在30％到40％之间，温度在19-23摄氏度之间。如果窗户显示过度冷凝，那么RH％水平将需要接近30％。冬天不要超过45％。
夏季：
在温暖的季节，相对湿度保持在50至55％之间，温度在23-26摄氏度左右。室外湿度可能暂时增加这些水平。
健康影响
相对湿度设置太低可能导致呼吸道感染，过敏性鼻炎和哮喘。 相对湿度过高可能会导致霉菌生长，尘螨感染以及某些细菌和病毒对健康的影响。
其中一个主要指标是您的窗户是否显示过度冷凝。 如果是这种情况，您可能需要进行室内空气质量评估，以确定冷凝问题的来源。
Humidity and temperature requirements for winter indoor in Canada
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Proper temperature and relative humidity levels are important in maintaining good air quality and occupant comfort. Improper relative humidity settings can create a variety of problems for any building such as bacteria, viruses, dust mites and mould growth.
Mould can grow inside perimeter walls due to condensation from high relative humidity. This is usually a hidden issue that may not show actual mould growth on the surface. However, airborne mould spores may begin to negatively affect occupant health and comfort.
Elevated humidity levels indoors can be an indicator of poor ventilation or exchange between the building and outdoors. Poorly vented bathrooms, laundry facilities, cooking facilities or improper use of humidifiers can cause the relative humidity to rise leading to a mould and bacteria problem.
Low humidity levels are usually the result of low outdoor levels experienced in Canadian winters when the outdoor humidity levels can reach the low teens.
Humidity levels should be managed throughout the year at appropriate levels for the season. In general ASHRAE Standard 62-2001 for Indoor Air Quality states the following:
Winter:
Maintain RH levels in winter between 30 to 40% and temperatures between 19-23 degrees Celsius. If windows show excessive condensation then the RH% levels will need to be closer to 30%. Never exceed 45% in winter.
Summer:
In warmer seasons keep the relative humidity between 50 to 55% with the temperature around 23-26 degrees Celsius. Outdoor humidity levels may temporarily increase these levels.
Health Effects
Relative humidity settings that are too low may cause respiratory infections, allergic rhinitis, and asthma. Relative humidity that is too high may cause health effects due to mould growth, dust mite infestation as well as certain bacteria and viruses.
One of the leading indicators is whether your windows are showing excessive condensation. Should this be the case you may want to have an indoor air quality assessment performed to determine the source of the condensation issue.