smaller, lighter, stronger, more efficent; bell & gossett brazed plate heat exchangers are ideal for residential and light commercial hydronic systems because they provide maximum heat dissipation. Unlike conventional shell and tube heat exchangers, our units can be used even in applications where space is at a premium. Their efficient design allows them to provide more heat transfer using less space, making them well suited to a variety of installations, including: domestic hot water, pool heating, radiant floors and snow melt. The unit’s stainless steel plates are vacuum-brazed together to form a durable, integral piece that can withstand high pressure and temperature. 1″ npt connection type. 4-3/8″w x 3-3/8″d x 12-1/4″h.