Diversified Heat Transfer’s Techtanium indirect water heaters feature a temperature and pressure relief valve and a domestic hot water outlet on the tank top for added installation convenience (models TT-40 & TT-55). It has a titanium liner for added strength and durability that works with any hydronic heat source. Titanium-lined indirect water heaters

The environmentally friendly polyurethane insulation limits heat loss and is both CFC- and H-CFC-free. It comes with a warranty for long life. Techtanium Solar and MP-Series indirect water heaters also are available.