35 humidity control

The drainage outlet for a humidifier should be at least ___, the open drain .

1 " above

Human comfort requires a relative Humidity between

30 and 50%

Humid air in

A

Warm air duct

A

Water pan

A

Special chemicals remove moisture from the air by

Adsobrtion

A category of humidifiers that project small water droplets into the air, either by mechanically flinging water or by forcing water through a nozzle

Atomizing humidifier

Drain connection

B

Humidstat

B

On off switch

B

Pump

B

A type of central humidifier that is installed between the supply, returning the plenums

Bypass humidifier

Air outlet

C

Humidistat

C

Water supply connection

C

Water vapor

C

Capillary tube

D

Crystal plate

D

Drum motor

D

Power line

D

Water that has been treated to remove minerals .

Demineralized water

Casing

E

Electric wave generator

E

Overflow drain

E

Water level adjustment screw

E

A category of humidifiers that add moisture to the air through evaporation

Evaporative humidifier

Absorbent filter

F

Blower

F

Dry air out

F

Water pan

F

Which humidifier uses a pad consisting of numerous layers of a tight metallic mesh wetted by water delivered from above?

Fixed air filter

A humidifier solenoid valve opens, when the __ running

Furnace and blower are

Air inlet

G

Drum motor

G

Power plug

G

Drum

H

Motor control

H

Humidistat is a control device that response to

Humidity

Drain

I

Float

I

A unit with a spinning disk that flings water against a diffuser which atomizes the water on impact

Impeller humidifier

Condensate pan

J

Solenoid valve

J

Evaporator

K

Water line

K

Frost control

L

Compressor

M

Untreated water with 5 to 15 grains / gal . of mineral content .

Medium hard water

Condensor

N

Filter drier

O

Which humidifier uses a series of porous materials that wick water upward to be evaporated, by passing air

Plate

A unit with a series of spinning plastic discs with shallow grooves

Rotating disk humidifier

A unit with a water pan and rotating drum covered with an absorbent sleeve

Rotating drum humidifier

An electromechanical humidistat hydroscopic element response to a decrease in humidity by

Shrinking

Natural , untreated water ( such as rainwater ) with a low mineral content

Soft water

Water in which an ion exchange has replaced unwanted minerals with the water soluble sodium salts

Softend water

A sample of air is able to hold more moisture

The higher is dry bulb temperature

True or False ? Water treatment compounds . can be used regularly to prevent bacterial growth algae , or scale buildup in a humidifier

True

True or false air change is per hour refers to the number of times the entire volume of air in a condition spaces were placed in one hour

True

A type of central humidifier that it starts at the bottom of the duct work

Under duct humidifier

A type of humidifier that uses its own heat source to create steam

Vaporizing humidifier

Unchewed water with over 15 grain/gallons of mineral content

Very hard water

Dehumidifiers remove moisture from the air by maintaining a coil ____of the air

below the dew point

humidifier's water feed line should be tapped into a building's .

cold water line

Dehumidification may be accomplished with special chemicals called

desiccants

The ideal water to use in humidifiers to prevent both duct deposits and foreign matter from entering the airstream is

distilled water

To humidify a single room rather than an entire building, it is best to use a

portable humidifier

A ratio of the moisture content in the air compared to the maximum amount of moisture that the air can hold at its current temperature describes

relative humidity

A float switch on a dehumidifier is intended to

stop operation of the dehumidifier

A humidifier must be mounted level if the humidifier has a

water reservoir