Highest temperature for imac

we had pretty warm days this summer and my computer room was burning the mac was hotter than ever so i decided to put an external fan/ventilator at the back approx. 50 cm away so it could cool down the mac which is the highest temperature that an imac can stand and perform without risking any damage ? not only the environmental temperature but also the imac's internal one

based on your hardware specs it sounds like you have an iMac Late 2006
http://support.apple.com/kb/Sp28
"Electrical and environmental requirements
Meets ENERGY STAR requirements
Line voltage: 100-240V AC
Frequency: 50Hz to 60Hz, single phase
Maximum continuous power: 180W (17- and 20-inch models); 220W (24-inch model)
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: -40° to 185° F (-40° to 85° C)
Relative humidity: 5% to 95% noncondensing
Maximum altitude: 10,000 feet"
Operating temperature: 50° to 95° F (10° to 35° C)<---

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