Billy Sweet Chimney Sweep's services are the complete package. Every Billy Sweet technician is certified by the Chimney Safety Institute of America and the National Fireplace Institute, and technicians use cutting-edge camera technology on every flue that they sweep. In addition to laying dropcloths and using industrial vacuums to maintain the cleanliness of your home, they document every job with before and after pictures and offer extras, like carbon monoxide testing, for free.