Golf courses are unusually difficult places to control mosquitoes. Water hazards, ornamental streams, long grass and deep tree shade combine into perfect breeding and resting habitat.

Many courses therefore choose a thermal fogging machine, because fog penetrates shrubs and shaded areas far better than conventional spraying. But hundreds of rai of ground encourage one very dangerous habit: running the machine continuously without a break.

This article follows a golf course in western Thailand whose new machine failed within its first year from overheating, and explains exactly what heat does to a fogger and how to prevent it.