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Numerical investigation of heat ventilation on the traditional house attic of Buginese in a hot and humid tropical climate was carried out using computational fluid dynamics models. The Navier-Stokes (RANS) modeling approach is used for numerical investigations. Determined the breakdown of steady-state conditions by using SolidWorks Flow Simulation software. Based on various flow simulations, numerical results obtained for temperature distribution, airflow patterns, indoor turbulence characteristics, Dynamic pressure, Density, and Turbulent Viscosity are presented. Using numerical results, it is known that the stack effect lowers the Attic temperature by increasing the airflow in it.

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Chicken feathers are the result of waste from slaughterhouses and billions ofkilograms of waste produced by various kinds of poultry processing. This hal is a veryserious problem for the environment because it causes the impact of pollution. Hasmany utilization of chicken feather waste such as making komocen, accessories,upholstery materials, making brackets to the manufacture of animal feed but from theresults of this activity cannot reduce the production of chicken feathers that hiscontinuously increase every year. This is due to the fact that the selling price of chickenmeat has been reached by consumers with middle to upper economic levels. This caneasily be a chicken menu in almost all restaurants and restaurants to the food stalls onthe side of the road. An alternative way of utilizing chicken feathers is to makecomposite materials in the form of panels. Recent studies have shown that the pvacmaterial can be utilized as a mixing and adhesive material with mashed or groundfeathered composites to form a panel that can later be used as an acoustic material.The test results show that the absorption of chicken feathers and pvac glue into panelscan absorb sound well with an absorption coefficient of 0.59, light. This result is veryeconomical so it is worth to be recommended as an acoustic material. Apart from theresults of research methods carried out is one of the environmentally friendly activitiesin particular the handling of waste problems