AFCI (Arc Fault Circuit Interrupters)

Special devices capable of opening a circuit when “arcing” in the circuit is detected. Arc-faults can occur anywhere in the home's electrical system including within walls, at loose electrical connections. 

BTU( British Thermal Unit)

A measure of the capacity of a heating or cooling system.The amount of heat energy required to raise the temperature of one pound of water through a change of one degree Fahrenheit. 

Carbon Monoxide

A colorless, odorless, highly poisonous gas formed by the incomplete combustion of carbon. 


The ability of insulation to slow the transfer of heat is measured in R-values. The higher the R-value the better the insulation resists the flow of heat. 


A naturally-occurring, radioactive gas which is heavier than air and is common in many parts of the country. Mitigation measures may involve crawl space and basement venting. 


The driving force behind the flow of electricity somewhat like pressure is in a water pipe. Most homes are wired with '110' and '220' volt lines. The '110' volt power is used for lighting and most of the other circuits. The '220' volt power is usually used for the kitchen stove, water heater and dryer.