HVAC Controls | McMaster-Carr

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Switching Current

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Number of Circuits Controlled

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Single

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Switching Voltage

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Number of Terminals

Wire Connection

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For Use With

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DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Height

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Compliant with Exemptions

REACH

Operation Type

Electrical Connection

Certification

C-UL Recognized Component

CE Marked

CSA Certified

Energy Star Certified

ETL Listed

FM Approved

UL Listed

UL Recognized Component

VDE Certified

Duct Size

Switch Starting Position

Load Type

Depth

300 Products

Electrical Power, Networking, and Controlling

Infrequent-Cycle Relays

Use with equipment that cycles on and off, such as HVAC systems

128 products

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

3 products

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Heating, Ventilation, and Air Conditioning

Thermostats

Connect to heaters, fans, and air conditioners to control the temperature

46 products

Thermostat Guards

Restrict access to thermostats and protect them from damage

12 products

Duct Damper Actuators

Automatically adjust duct dampers to regulate airflow

5 products

Temperature-Controlled Outlet Adapters

Automatically turn heating and cooling devices on and off as temperatures rise and fall

3 products

HVAC Switches

Control and monitor airflow in HVAC systems automatically

3 products

HVAC Flame Detectors

Replace flame detectors in HVAC equipment such as furnaces, ovens, water heaters, and boilers

1 product

Flue-Gas Exhausters

Vent furnaces and other gas- or oil-fired equipment

8 products

Duct Airflow Dampers

Regulate airflow to sections of duct

20 products

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

6 products

Duct Fire Dampers

Automatically close at high temperatures to help prevent the spread of fire through duct

13 products

Measuring and Inspecting

Smoke Pens

Produce smoke to observe airflow and detect leaks in HVAC systems; reusable, unlike smoke candles

2 products

Smoke Candles

Light the wick for a short burst of smoke to observe airflow and detect leaks in HVAC systems

4 products

Smoke Pellets

Detect airflow and leaks in HVAC systems near server rooms and other areas with electronics

4 products

Smoke Powder

No flame needed—release a burst of powder to detect airflow and leaks in HVAC systems

3 products

Safety Equipment

Smoke Detector Test Stations

Test hard-to-reach HVAC smoke detectors from a convenient location

1 product

Smoke Detectors

Warn people when there's smoke in your facility

6 products