What does CNVTN stand for?

Convection

A mortgage loan not insured by a government agency (such as FHA or VA). Currents created by heating air, which then rises and pulls cooler air behind it. Also radiation. The motion resulting in a fluid from the differences in density. In heat transmission, this meaning has been extended to include both forced and natural motion or circulation. The motion resulting in a fluid from the differences in density. In heat transmission, this meaning has been extended to include both forced and natural motion or circulation.