Even on rough carpentry projects, such as laying out a wall or partition with a carpenter's square, sharpen your pencil after every six marks. Using a blunt pencil could add as much as an inch to the overall dimensions over about 20 feet. This can throw the entire structure out of whack and make it difficult to fit wallboard, sheathing and other modular materials.
Insects love warm electrical components and air conditioners are full of them. If you want to keep insects out, experts say do not use insecticides, because the electrical components will not like them. One option is to get a special cover for your relay switch, but be aware that it has to be installed by an air conditioning technician. The cheapest (and easiest) way to keep them away is to use a flea collar. To install the flea collar, shut the power off to the air conditioner and simply placed the collar near the relay switch.