With the Trane 15 kW 50000-55000 BTU Single Phase Electric Heat Kit MAYHTR1A15BKRB, operational efficiency is a guarantee along with compatibility with the rest of the units in your HVAC system. More Info: https://greenleafair.com/product/trane-15-kw-50000-55000-btu-single-phase-electric-heat-kit-mayhtr1a15bkrb/