well ingon man si whoopz na init kau iya room kung udto, well its a matter of heat transfer lang gud. Ang init sa enviroment mo transfer man sa casing, but this would not affect greatly on the internal components ng PC during operation. But in the long run it will degrade and it will shorten the lifespan ng mga IC ug transistors. IC manufactures conducts heat testing kung asa kutob ang IC mo fail at certain temp but they do'nt conduct endurance test. The manufactures only presume that your oprating at 24 degree celcius room temp.
Well putting some insulation in the casing will reduce the amount of heat adding up to to the IC's and prolonging its life span. Kita ka ng ibutang sa auto during udto na mag-sinaw sa samin(windshiled) pareha lang ang theory ana. Ngana na material, murag naay baligya ana sa mga store. Ako PC naa man pero sa akong gibutang sa ilalum sa mobo kay nipis lang ang heat plate ubos sa processor.
Pero kung well ventilated iya room ang huna-hunaon lang niya is heat desipation. Mao na its gud to have addtional fans sa PC, sakto pod kay sunyats3n na air circulation is another key technique.