The GT 430 A is a Three Pass Design with large combustion chamber and horizontal flue passes with fins. The heat transfer is enhanced by the fins and eutectic cast iron baffles. This body design assures:

​  Efficiency up to 88%

​  Low pressure drops

​  Low noise level

​  High thermal efficiency and heat transfer

Low Water Outlet Temperature down to 85°F with indoor/outdoor reset achieves significant energy savings by reducing stand-by fuel consumption. In addition, it’s not necessary to maintain boiler temperature between the two heating cycles, which further reduces fuel consumption and achieves excellent overall efficiency. Studies show substantial savings over retrofit boilers and over new competitive models.

Easy Cleaning with Hinged Door for burner and flue access. Doors can be hinged right or left based on your access needs. Boiler is easily cleaned and vacuumed, resulting in lower maintenance costs.

Eutectic Cast Iron boiler body provides exceptional resistance to temperature variations and thermal stress. De Dietrich’s eutectic cast iron is 30% more flexible than any competitive cast iron allowing safe low temperature operation.