Eliminate Thermal ShockEliminate any thermal shock concerns with our Series 3-SP Shock Proof hot water boiler package. This boiler design uses our reliable Series 3 that incorporates a high steam space volume that can easily accommodate the industries largest full capacity coil. The Series 3 wetback design and low volumetric furnace release rates allow easy firing and a prolonged boiler life. When properly commissioned and maintained, your shock -proof packaged boiler will last for many years. There is no steam side water make up, so no steam side accessories are required. After treating the steam side, you can expect your boiler to run clean for a long time. The hot system water flows only through the tubes of the heat exchanger. The specially designed heat exchanger tubes are highly resistant to corrosion and erosion. The specially constructed head allows for flanged supply and return connections for the complete coil trim package provided. The coil trim package consists of inlet and outlet pressure gauges, inlet and outlet thermometers and coil side safety valves. Equipped with a full capacity coil type heat exchanger good for 125 psi water pressure.