It is important to have the correct dry chemical fire extinguisher as each is filled with a different chemical. A general purpose fire extinguisher with a rating A-B-C is usually suitable for most homes, and many businesses, depending on the particular hazard. The advantage to dry chemical is that they leave a blanket of residue over the fire preventing reigniting.Pressurized Dry Chemical Extinguishers are the most common types of extinguishers used for building protection, are easy to operate and comply with all code requirements. These economical extinguishers come in all designs, types and shapes.