Phcc Ch 13

This type of water heater uses a heat source to gradually heat water in a tank to a desired set point.

• storage or tank type

• high energy

• tankless

• gradual

Tank-type water heaters:

• are the least commonly used.

• are lower in energy loss.

• require a greater equipment footprint.

• have more complex controls.

Tankless water heaters:

• have higher initial costs.

• have a lower BTU per hour rating.

• have lower energy input rates.

• have less complex controls.

What are possible heat sources for a storage-type water heater?

• A separate boiler.

• Solar panels.

• Its own input source and controls.

• All are correct.

What are the two key factors when deciding on storage tank size?

• heating demands

• recovery rate

• geography

• A and B

Tankless water heaters do not store any hot water in reserve. Therefore, they:

• require a gas system with larger diameter pipes or higher pressures.

• must convert fuel at a higher rate than storage tank models.

• A, B, and D

• must use heavier gauge wire or higher voltage.

A point-of-use electric water heater:

• allows small amounts of water to be delivered to the fixture instantly.

• means the user does not have to run the water until the hot water reaches the fixture.

• A, B, and D.

• allows large amounts of water to be conserved.

__________ use either a fuel-fired or electric element to heat the water.

• Direct-fired tankless units

• In-direct tankless units

• Hot water heaters

• Solar water heaters

In an indirect-fired water heater, what is passed through a coil or containment tank that is in turn directly connected to the potable water source?

• oil, gas, tube, pipe

• steam, hot water, coil, containment tank

• steam, hot water, tube, pipe

• oil, gas, coil, containment tank

Solar energy collectors are usually divided into three categories: __________, __________, and __________.

• radiators, conductors, convectors

• low temperature, medium temperature, concentrators

• low temperature, medium temperature, high temperature

• drain back, high pressure, vacuum tube