Simple rewiring during installation configures versaTherm screw-plug heater for output of 0.5-10 kW (oil version) or 0.5-40 kW (water version), as well as compatibility with 120, 208, 240, 277, 380, 400, or 480 Vac line, single- or 3-phase. Insertion length measures 20 13/16 or 30 3/8 in. long, threads into 2.5 in. port, and boasts Incoloy sheath.