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Bimetal heat motor
Bimetal snap disc
Noise it makes.
Heating elements would all be started at the same time unless separate time delay relays were used.
Both A and C.
Start the furnace if the thermostat malfunctions.
Ensure that the fan stops when the furnace cools down.
Starts the furnace prematurely on a cold day.
Open the circuit to the heating elements if the furnace overheats.
Hanging from the ceiling.
As baseboard heat.
As forced-air furnaces.
For hot water systems.
Easily adapts to central air conditioning.
Is radiant-type heat.
Uses circulating hot water.
Can easily have humidity equipment added to the system.
Refrigerant used for special systems.
Old fruits and vegetables.
Pressboard and carpets.
Usually found in damp areas in basements.
Often found in dust blown through vacuums with HEPA filters.
Microscopic spider-like insects.
Related to mold spores.
Is usually found in dusty, dry areas.
Is usually found in areas where there is moisture and/or high humidity.
Is seldom found in areas where it can be seen.
Spores are not harmful to humans.
Remove the source of moisture.
Vacuum the area.
Check for radioactive activity.
Check the filter media in the area.
Has a bluish color.
Can easily be seen.
Is heavier than air.
Is produced by incomplete combustion in appliances that use the combustion process.
Polycyclic organic matter.
Nonpolycyclic organic matter.
Particles from combustion.
All of the above.
Should be brushed down and swept up by the HVAC technician.
Should be removed by a certified or licensed contractor.
May be removed when found as part of a mold remediation program.
Should be vacuumed up when found.
A problem to deal with.
Generally not recommended.
Never used in a residence.
The process of supplying or removing air by natural or mechanical means.
Polishing the outside of the duct.
Washing out with with a hose and water.
Using compressed air.
Using a vacuum system and brushing.
Be installed correctly.
Be serviced regularly.
Use good water.
All of the above.
40% of air is moisture.
60% of the air is moisture.
The air has 60% of the moisture it has the capacity to hold.
The air has 40% of the moisture it has the capacity to hold.
Into the air.
Onto an evaporative media.
Into a hydronic boiler.
An air pressure-sensing
Tiny water droplets
Thermistor and ionization generator.
Spray nozzle and centrifugal.
Disc and drum types.
Particulate and oxidation types.
All of the above
Trapped by a filter.
Charged with an electrical charge.
Washed with a special cleaner.
Treated to remove many of the odors.
Giving up heat
Becoming too dry
Less airflow than
Greater airflow than
About the same airflow as
Electric baseboard heaters and radiators
Evaporator and condenser
Grilles and registers
Blower and damper
In a circuit with the same resistance
So that they produce the same amperage.
Thermocouple and limit switch
Glow coil and static pressure disc
Transformer and fan relay
Stack switch and cad cell
Either the heating or cooling
In a series with the original.
As a separate circuit.
In a parallel with the fan relay.
In a parallel with the compressor contactor.
¼ HP and a fan wheel that is 10" in diameter and 8" wide.
⅓ HP and a fan wheel that is 10" in diameter and 8" wide.
⅓ HP and a fan wheel that is 9" in diameter and 9" wide.
¼ HP and a fan wheel that is 9" in diameter and 8" wide.