Termomix valves fromEnerjee(Morrisville, PA) are available in three- and four-way patterns, in sizes ranging from 1/2 to 1 1/2 in. The valves are engineered for use with the company's Automix 20 electronic temperature control with night setback for radiant floor heating and new or retrofit radiator or fin-tube baseboard applications, specifically hydronic heating applications in small commercial installations.