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A hot water heating system operates at ___.

Most noncondensing boilers could be forced to condense by changing the set points of the controls.

Some compression tanks are equipped with a ___ for determining the compression tank water level.

The ___ promotes a whole-building approach to sustainability by recognizing performance in five key areas of human and environmental health.

Steady-state efficiency is a measure of how efficiently a boiler’s burner burns fuel without considering any losses.

In addition to safety valves, four other types of valves are sometimes used on boilers to prevent overpressure.

During bottom blowdown, the boiler operator should hold the valve handle until the valve closes.

Heating units are designed to minimize heat loss from a building space.

A solution with a pH greater than ___ is alkaline.

When a flame safeguard programmer sequences burner function, ___ is the period of time during which the pilot and main burner must be lit.