Researches were performed in 5 farms (F1, F2, F3, F4, F5) with a total of 20 dairy cows heads/farm whit similar growth conditions, system maintenance: tied-stall during cold season and grazing in spring-autumn season. Animal shelters are the undersized in terms of requirements related with necessary of fresh air, and the introduction of clean air. Air volumes calculated after carbon dioxide and humidity indicates de iciencies on removing harmful gases during winter [CO%: 0.4±0.03 (F1)-0.6±0.02 (F2); NH3: 0.21±0.3 (F1)-0.26. 8±0.04 (F3)] and air low produced by ventilation unorganized adopted [0.6±0.22 (F1)-0.92±0.29 (F4] increase the degree of discomfort to the animals. Comfort and welfare in terms of the surface resting expressed by cow comfort index (CCI) and Stall Standing Index (SSI), assessed by repeated observations varies between: CCI= 70%(F2) and 90%(F1, F4), SSI= 10±8.52 (F5)-30±13.484 (F2) during winter depending on the degree of comfort provided by stand size. Between THI values obtained and these indicators notice differences extremely signi icant. Mobility and locomotion score/overall farms indicate values between 1.90±0.49 (F5) and 2±0.56 (F3) on grazing season but higher in the cold season, existing whole range of relationships: from insigni icant to extremely signi icant.