Humidity fluctuations in solar greenhouse-residences

The thermal performance of solar greenhouse-residences is well-documented. Data concerning temperature fluctuations and horticultural yield are obtainable and provide a clear picture of greenhouse-residence temperature extremes. However, both human comfort and plant growing environment are not dependent upon temperature alone. Air movement, radiation, and humidity are other criteria that can influence thermal comfort and growing conditions. The effect a vegetable peoducing greenhouse has on thermal comfort of an adjoining residence is illustrated in terms of temperature and humidity. An analysis of dewpoint conditions will further indicate the effect of moisture within the individual components. A solar greenhouse-residence with an integrated heating collection and distribution system exhibited higher internal humidities than conventional housing. The greenhouse exhibited greater diurnal swings than the adjoining residence. Transfer of moisture occurred from greenhouse to residence and caused infrequent dewpoint levels in the house. An analysis of two such buildings indicated a higher average relative humidity in the solar greenhouse-residence over conventional housing in the southeast.