Construction
All tank shells are made from 1/4-inch steel plate and are double-welded at the seams. The shells ride in saddles supported by channels. The tanks are hydro-tested for leaks prior to completion.

The incoming water is introduced into the tank by a spray bar in the top of the tank. It distributes the cold water evenly so as to minimize cold spots.

Insulation
All external surfaces of the tank shell have six inches of fiberglass insulation to minimize heat loss and to increase fuel efficiency. This also produces faster recovery times as the water is used.

Heating system
The heating system consists of a forced-draft burner that fires into a large combustion chamber. The combustion chamber is lined with refractory material for longer life. It extends the length of the tank.

The deluxe tank has two secondary heating tubes that connect to the far end of the combustion chamber. They double back inside the tank and connect to two exhuast stacks that exit through the top of the tank. The secondary tubes significantly increase the amount of heating surface in contact with the water. They enable our heating system to easily outperform other direct-fired tanks on the market today.

The economy tank lacks the secondary heating tubes. A single exhaust stack connects to the far end of the combustion chamber. Although it is not as efficient as our deluxe tank, its efficiency is comparable to other units on the market.

Burner
WH tanks use a fully-modulating burner. Our standard burner uses No. 2 fuel oil. However, burners are also available tor gas, LP or combination gas/oil.

The full-modulation burner matches the firing rate to the heat demand, thereby eliminating constant recycling and temperature overshooting. Its infinitely variable firing rate operates much more efficiently than a burner that has only two states (either fully ON or OFF) or one that has only three states (LOW, HIGH or OFF). Competitive heating tanks use those types of burners even though they are not as efficient.