Thermostats

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200+ Honeywell & Resideo Thermostats ā€” Ships Today from Memphis, TN

Commercial HVAC Thermostats ā€”
Honeywell & Resideo Fan Coil, BACnet & Aquastat Controllers

We stock 200+ Honeywell and Resideo commercial thermostats including the top-selling TB6575A1000 and TB8575A1000 SuitePRO fan coil thermostats, TC300B-G and TC320B-G BACnet communicating thermostats, the TC500A-N touchscreen commercial thermostat, Resideo aquastat controllers (L4006, L6006, L4008, L6008 series), T775 electronic temperature controllers, and programmable room thermostats. As a Honeywell Gold PMT Channel Partner, we ship same day from Memphis, TN.

Authorized distributor: Honeywell Resideo
Talk to an Expert Call (901) 458-2000
Honeywell Gold PMT Channel Partner Fan Coil Ā· BACnet Ā· Aquastat Ā· Programmable Free Same-Day Shipping In Business Since 1967
Honeywell Gold PartnerAuthorized distributor ā€” genuine OEM Honeywell and Resideo thermostats
Fan Coil & BACnetTB6575, TB8575 SuitePRO fan coil; TC300/TC320/TC500 BACnet communicating
Fan Coil SpecialistsTB6575 & TB8575 SuitePRO series ā€” the standard for commercial fan coil unit replacement
Same-Day ShippingOrders by 2 PM CT ship same day ā€” always free

Top-Selling Fan Coil Thermostats

The TB6575A1000 and TB8575A1000 are the most common commercial fan coil thermostat replacements for hotels, apartments, and commercial office buildings. We keep them in stock. The key difference is voltage: TB6575A1000 = line voltage (120/240 VAC) Ā· TB8575A1000 = low voltage (24 VAC).

Line Voltage Ā· 2-Pipe & 4-Pipe TB6575A1000

Honeywell SuitePRO Fan Coil Thermostat ā€” Line Voltage (120/240 VAC). The most common commercial fan coil thermostat for hotels, apartments, and commercial office buildings with line voltage fan coil units. Controls 2-pipe and 4-pipe FCUs with 3-speed fan (Low/Med/High/Auto) and manual or automatic heat/cool changeover. LCD display, 50ā€“90Ā°F setpoint range. CSA C/US certified. Replaces TB6575A1016, T6051A1016, T6575D1009, T6575B1003, T6575C1001.

120/240 VAC Line Voltage 2-Pipe & 4-Pipe FCU 3-Speed Fan Manual/Auto Changeover 50ā€“90Ā°F Range CSA C/US
Low Voltage Version TB8575A1000

Honeywell SuitePRO Fan Coil Thermostat ā€” Low Voltage (24 VAC). The 24 VAC version of the SuitePRO line for fan coil units controlled by a 24V system ā€” same LCD display, 3-speed fan control, and 2-pipe/4-pipe capability as the TB6575A1000, but wired for low-voltage systems. Compatible with optional remote sensor (wall or pipe) and adaptor plate accessories. No batteries required.

24 VAC Low Voltage 2-Pipe & 4-Pipe FCU 3-Speed Fan Heat or Cool Changeover No Batteries Required CSA C/US
2-Pipe Only Version TB6575B1000

Honeywell SuitePRO Fan Coil Thermostat ā€” 2-Pipe Only (120/240 VAC). The 2-pipe-only version of the SuitePRO line for systems where hot or cold water is switched seasonally or manually. Unlike the TB6575A1000 (which handles 2-pipe and 4-pipe with auto changeover), the TB6575B1000 is designed for 2-pipe only fan coil systems with seasonal or manual heat/cool changeover ā€” no automatic changeover. Same 3-speed fan control, LCD display, and 50ā€“90Ā°F setpoint range. Contact us for availability.

120/240 VAC Line Voltage 2-Pipe ONLY 3-Speed Fan Seasonal/Manual Changeover 50ā€“90Ā°F Range CSA C/US
277V Version TB6575C1000

Honeywell SuitePRO Fan Coil Thermostat ā€” 277V Line Voltage. The 277V version of the SuitePRO line for commercial buildings where fan coil units run on 277V ā€” common in larger office buildings and hotels with 277V electrical systems. Same LCD display, 3-speed fan control (Low/Med/High/Auto), 2-pipe and 4-pipe capability, and manual or automatic changeover as the TB6575A1000. Contact us for availability.

277 VAC Line Voltage 2-Pipe & 4-Pipe FCU 3-Speed Fan Manual/Auto Changeover 50ā€“90Ā°F Range CSA C/US

BACnet Communicating Thermostats ā€” TC300B-G, TC320B-G & TC500A-N

For commercial buildings requiring thermostat integration with a building automation system (BAS), Honeywell's TC300/TC320/TC500 series provides BACnet MS/TP, Modbus, and Wi-Fi/BACnet IP connectivity. These are the modern replacement for the T7350 series. Contact us for availability and configuration guidance.

BACnet MS/TP + Modbus TC300B-G

Honeywell TC300 Commercial Thermostat ā€” Wired BACnet. Highly configurable 24 VAC thermostat for 2-pipe and 4-pipe fan coil units, 1H/1C conventional, and 2H/1C heat pump applications. Communicates via BACnet MS/TP and Modbus RTU over RS485. Color touchscreen display, Ā±1.5Ā°F accuracy, flexible I/O for nearly any FCU configuration including on/off, floating, modulating, or 6-way valves and multi-speed or variable speed fan. Grey finish.

24 VAC BACnet MS/TP Modbus RTU 2/4-Pipe FCU Heat Pump Color Display
Wi-Fi + BACnet IP TC320B-G

Honeywell TC320 Commercial Thermostat ā€” Wi-Fi & BACnet IP. The TC300B-G with added Wi-Fi/BACnet IP and Bluetooth connectivity for wireless BAS integration and remote control via the Honeywell Connect Me app. Same FCU configuration flexibility and communicates via BACnet MS/TP, Modbus RTU, and BACnet IP over Wi-Fi (2.4 GHz). Supports dehumidification with reheat and water source heat pump applications.

24 VAC Wi-Fi BACnet IP Modbus RTU Bluetooth 2/4-Pipe FCU Connect Me App
Touchscreen Ā· BACnet IP TC500A-N

Honeywell TC500A Commercial Touchscreen Thermostat. Advanced commercial thermostat with Wi-Fi/BACnet IP connectivity, touchscreen display, 2 universal inputs, 2 universal I/Os, and Sylk bus terminals for sensor and accessory connection. Built-in temperature sensor plus support for external sensors. Firmware upgradeable over Wi-Fi. Configurable via HMI or BACnet IP. Replaces T7350 series applications. Available in stock.

BACnet IP Wi-Fi Touchscreen 2 Universal Inputs Sylk Bus OTA Firmware In Stock
Line Voltage Versions TC300C-G & TC320C-G

Honeywell TC300C / TC320C ā€” Line Voltage (100ā€“277 VAC). Line voltage versions of the TC300/TC320 series for 4-pipe and 2-pipe FCU applications where line voltage control is required. TC300C-G = wired BACnet MS/TP/Modbus; TC320C-G = same with added Wi-Fi/BACnet IP and Bluetooth. Contact us for availability.

100ā€“277 VAC 4-Pipe / 2-Pipe FCU BACnet MS/TP Wi-Fi Option

Pneumatic Thermostats ā€” Honeywell TP970A2004

For commercial buildings with pneumatic HVAC control systems ā€” older office buildings, hospitals, universities ā€” Honeywell's TP970 series pneumatic thermostat is the industry standard. Contact us for availability.

Pneumatic Thermostat TP970A2004

Honeywell TP970 Series Pneumatic Thermostat ā€” Direct Acting, 59ā€“90Ā°F, 2-Pipe. The TP970A2004 is a two-pipe, single-setpoint pneumatic thermostat that provides proportional control of pneumatic valves and damper actuators in heating and air conditioning systems ā€” it uses compressed air (not electricity) as the control signal. Direct acting (DA), bi-metal sensing element, setpoint range 59ā€“90Ā°F, adjustable throttling range 2ā€“10Ā°F (factory set at 4Ā°F), 1/8" air connections, 25 PSI maximum air pressure. Used in commercial buildings with pneumatic HVAC control systems.

Note: This is a pneumatic thermostat ā€” it requires a compressed air supply and is used in buildings with pneumatic HVAC controls. It is NOT a digital or low-voltage thermostat. Replacement kits are available for Johnson Controls, Powers, Robertshaw, Barber-Colman, and older Honeywell pneumatic thermostats. Universal locking cover sold separately. Contact us for availability.

Pneumatic (Air) Signal 2-Pipe Direct Acting 59ā€“90Ā°F Range 2ā€“10Ā°F Throttling 25 PSI Max Cover Sold Separately

All Thermostat Types We Stock

Fan Coil Thermostats ā€” Line Voltage

TB6575A1000 (120/240 VAC, 2-pipe & 4-pipe, auto changeover) and TB6575B1000 (120/240 VAC, 2-pipe only, seasonal/manual changeover) SuitePRO 3-speed fan coil thermostats for commercial FCUs in hotels, apartments, and offices.

Fan Coil Thermostats ā€” Low Voltage

TB8575A1000 (24 VAC, 2-pipe & 4-pipe, manual/auto heat or cool changeover) ā€” the low-voltage version of the SuitePRO line for fan coil units on 24V systems.

BACnet Communicating Thermostats

TC300B-G (BACnet MS/TP/Modbus), TC320B-G (adds Wi-Fi/BACnet IP/Bluetooth), TC500A-N (BACnet IP touchscreen) ā€” for building automation system integration.

Aquastat Controllers (Resideo/Honeywell)

L4006 and L6006 immersion aquastats (100ā€“270Ā°F) and L4008/L6008 remote bulb aquastats with capillary for high-limit, low-limit, and circulator control. See the Aquastat section below for full model breakdown.

Electronic Temperature Controllers

T775 series ā€” dual sensor, single and dual loop, boiler reset, NEMA 4X versions with 2ā€“4 SPDT relays and analog outputs. Used for commercial boiler and HVAC process control.

Remote Bulb & Refrigeration Controllers

T6031A1136 remote bulb refrigeration temperature controller (āˆ’30Ā°F to +90Ā°F, 8' capillary, SPDT, 120 VAC) for cold storage and refrigeration applications.

Pneumatic Thermostats

TP970A2004 ā€” 2-pipe single-setpoint pneumatic thermostat for commercial buildings with pneumatic HVAC control systems. Direct acting, 59ā€“90Ā°F, 2ā€“10Ā°F throttling range, 1/8" air connections. Replaces Johnson Controls, Powers, Robertshaw, Barber-Colman, and older Honeywell pneumatic thermostats.

Programmable & Non-Programmable

TH3110D1008 non-programmable 1H/1C thermostat (24V or 750mV). TH6210U2001 T6 Pro programmable 2H/1C thermostat. T498B1512 electric heat thermostat (DPST, 120/208/240 VAC, 22A).

Resideo (Honeywell) Aquastat Controllers

Aquastats are immersion or remote-bulb temperature controls for hot water boilers ā€” used for high-limit protection, low-limit/domestic hot water priority, and circulator pump control. We stock the most common Resideo (formerly Honeywell) aquastat series. Call us with your boiler make and model for selection help.

Aquastat Quick Reference

L4006 series ā€” Immersion type, copper bulb, SPST contacts, 100ā€“270Ā°F depending on model. High or low limit control only.

L6006 series ā€” Immersion type, copper bulb, SPDT contacts (NO+NC). High limit, low limit, AND circulator control from one device.

L4008 series ā€” Remote bulb type with capillary (5.5' or 10'), SPST contacts. For longer reach or where the bulb must be located away from the controller.

L6008 series ā€” Remote bulb type with capillary, SPDT contacts. High/low limit + circulator with remote sensing element.

L4081 series ā€” Dual-element immersion aquastat with separate high AND low limit setpoints in one unit.

L8148 series ā€” Boiler aquastat relay with integrated high limit, low limit, and circulator relay. Contact us for availability.

L4006A1967 Immersion Ā· SPST Ā· 100ā€“240Ā°F Ā· High/Low Limit Ā· Horiz/Vert L4006A1678 Immersion Ā· SPST Ā· 100ā€“240Ā°F Ā· High/Low Limit Ā· Horiz/Vert L4006E1067 Immersion Ā· SPST Ā· 130ā€“270Ā°F Ā· High Limit Ā· Manual Reset L6006A1145 Immersion Ā· SPDT Ā· 100ā€“240Ā°F Ā· High/Low + Circulator Ā· Horiz Mount L6006C1018 Strap-On Ā· SPDT Ā· 65ā€“200Ā°F Ā· High/Low + Circulator L4008A1015 Remote Bulb Ā· SPST Ā· 100ā€“240Ā°F Ā· 5.5' cap Ā· High/Low Limit L4008A1130 Remote Bulb Ā· SPST Ā· 130ā€“270Ā°F Ā· 10' cap Ā· High/Low Limit L4008E1305 Remote Bulb Ā· SPST Ā· 100ā€“240Ā°F Ā· Manual Reset Ā· High Limit L4008E1156 Remote Bulb Ā· SPST Ā· 130ā€“270Ā°F Ā· Manual Reset Ā· High Limit L4008E1040 Remote Bulb Ā· SPST Ā· 130ā€“270Ā°F Ā· Manual Reset Ā· 66" lead L6008A1192 Remote Bulb Ā· SPDT Ā· 100ā€“240Ā°F Ā· 5.5' cap Ā· Circulator L4081A1023 Dual Element Ā· High + Low Limit Ā· 130ā€“240Ā°F / 110ā€“220Ā°F 121371A Copper Aquastat Well Ā· 3" insertion Ā· Ā½" NPT L8148 Series Boiler Aquastat Relay (H/L/Circ) ā€” Contact Us

Popular Models

View all 200+ ā†’
TB6575A1000SuitePRO Fan Coil 120/240 VAC 2/4-Pipe TB8575A1000SuitePRO Fan Coil 24 VAC 2/4-Pipe TB6575B1000SuitePRO 120/240 VAC 2-Pipe Only ā€” Inquire TC500A-NTouchscreen BACnet IP Thermostat TC300B-GBACnet MS/TP Fan Coil ā€” Inquire TC320B-GWi-Fi BACnet IP Fan Coil ā€” Inquire T775U2006Universal Electronic Controller T775M2048Dual Loop Electronic Controller T775P2003Boiler Reset Controller T775M20144 SPDT Relays, NEMA 4X T775B2032Dual Sensor, Includes 1 Sensor L6006A1145Aquastat High/Low 100ā€“240Ā°F SPDT L6006C1018Strap-On Aquastat 65ā€“200Ā°F SPDT L4006A1967Aquastat Circulator 115Ā°F SPST L4008A1015Remote Bulb Aquastat 100ā€“240Ā°F L4006E1067High Limit Manual Reset 130ā€“270Ā°F L4008E1040High Limit Manual Reset Remote Bulb T6031A1136Remote Bulb āˆ’30 to +90Ā°F 120 VAC T498B1512Electric Heat 120/240 VAC DPST TH3110D1008PRO 3000 Non-Programmable 1H/1C TH6210U2001T6 Pro Programmable 2H/1C TP970A2004Pneumatic Thermostat DA 59ā€“90Ā°F ā€” Inquire TB6575C1000SuitePRO 277 VAC 2/4-Pipe ā€” Inquire

Commercial HVAC Thermostats

Elevate your heating and cooling systems with our sophisticated range of commercial HVAC thermostats. Designed for superior performance and reliable control, our selection features trusted brands such as Honeywell and Resideo. These thermostats are meticulously engineered to optimize the functionality of fan coil units, BACnet systems, and Aquastat controllers.

Why Choose Our Thermostats?

  • Precision Control: Our thermostats deliver accurate temperature regulation, ensuring maximum comfort in any commercial space.
  • Compatibility: Each thermostat is designed for seamless integration with existing HVAC systems, providing versatility for various applications.
  • Durability: Built to last, these thermostats are constructed from high-quality materials, ensuring longevity and dependable performance.

Featured Products

Explore our diverse range of thermostats to enhance the efficiency of your HVAC systems. With our cutting-edge technology and reliable products, you can achieve optimal climate control for your commercial spaces.

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Not sure which thermostat you need?

Fan coil, BACnet, aquastat, or programmable ā€” we've been specifying Honeywell thermostats since 1967.

Talk to an Expert Call (901) 458-2000

Commercial Thermostats ā€” Frequently Asked Questions

Common questions about Honeywell and Resideo fan coil thermostats, BACnet communicating thermostats, and aquastat controllers. Contact our team or call (901) 458-2000.

What is the difference between the TB6575A1000 and TB6575B1000?

Both are Honeywell SuitePRO line voltage (120/240 VAC) fan coil thermostats but they differ in pipe configuration and changeover capability. The TB6575A1000 works with both 2-pipe and 4-pipe fan coil units and supports manual or automatic heat/cool changeover. The TB6575B1000 is for 2-pipe only fan coil systems and supports seasonal or manual changeover only ā€” no automatic changeover. If your system is 4-pipe or needs automatic changeover, use the TB6575A1000. If your system is 2-pipe with a seasonal switch from heat to cool, the TB6575B1000 may be the right fit.

Is there a TB8575B1000?

No ā€” the TB8575B1000 does not exist. The SuitePRO 24 VAC fan coil thermostat family only has the TB8575A1000. The "B" suffix in the TB6575 line (TB6575B1000) refers to the 2-pipe-only line voltage model, but there is no equivalent "B" model in the 24 VAC TB8575 line. If you need a 24 VAC SuitePRO fan coil thermostat, the correct model is the TB8575A1000.

What is the Honeywell TP970A2004?

The Honeywell TP970A2004 is a pneumatic thermostat ā€” it uses compressed air as the control signal rather than electricity. It is a two-pipe, single-setpoint, direct-acting pneumatic thermostat that provides proportional control of pneumatic valves and damper actuators in heating and air conditioning systems. Setpoint range is 59ā€“90Ā°F with an adjustable throttling range of 2ā€“10Ā°F (factory set at 4Ā°F). Used in older commercial buildings ā€” hospitals, universities, office buildings ā€” with pneumatic HVAC control systems. Replacement kits are available for Johnson Controls, Powers, Robertshaw, Barber-Colman, and older Honeywell two-pipe pneumatic thermostats. Note: the cover is sold separately. Contact us for availability.

What is the difference between the TB6575A1000 and TB8575A1000?

Both are Honeywell SuitePRO fan coil thermostats with the same features ā€” LCD display, 3-speed fan control (Low/Med/High/Auto), 2-pipe and 4-pipe FCU capability, and manual or automatic heat/cool changeover. The only difference is voltage: the TB6575A1000 is line voltage (120/240 VAC) and the TB8575A1000 is low voltage (24 VAC). Check your existing thermostat wiring or fan coil documentation to confirm which voltage you need before ordering.

What does the TB6575A1000 replace?

The TB6575A1000 is the direct replacement for these discontinued Honeywell models: TB6575A1016, T6051A1016, T6575D1009, T6069A4010, T6575B1003, and T6575C1001. If you have any of these models installed, the TB6575A1000 is the current replacement.

What is the difference between the TC300B-G and TC320B-G?

Both are 24 VAC Honeywell commercial BACnet thermostats for fan coil, conventional, and heat pump applications with BACnet MS/TP and Modbus RTU over RS485. The TC320B-G adds Wi-Fi/BACnet IP over 2.4 GHz and Bluetooth 5.3 for wireless BAS integration and remote control via the Honeywell Connect Me app. Choose TC300B-G for wired RS485 systems; choose TC320B-G when wireless BACnet IP or app control is needed.

What is the Honeywell TC500A-N?

The TC500A-N is an advanced commercial touchscreen thermostat with Wi-Fi/BACnet IP connectivity, built-in temperature sensor, 2 universal inputs, 2 universal I/Os, and Sylk bus terminals for sensors and accessories. Configurable via touchscreen HMI or BACnet IP, with firmware upgradeable over Wi-Fi. It is the current replacement for T7350 series thermostat applications. Available in stock at Memphis Control Center.

What is a Resideo aquastat controller?

A Resideo aquastat (formerly Honeywell) is an immersion or remote bulb temperature control used to regulate or limit water temperature in hot water heating systems. Used for high-limit control (preventing overheating), low-limit control (maintaining minimum boiler temperature), and circulator control (starting the pump at setpoint). Series breakdown: L4006 (immersion copper bulb, SPST, 100ā€“270Ā°F depending on model); L6006 (immersion copper bulb, SPDT, high/low limit plus circulator); L4008 (remote bulb with 5.5' or 10' capillary, SPST); L6008 (remote bulb with capillary, SPDT, circulator); L4081 (dual element, separate high and low limit setpoints in one unit).

What is the Honeywell T775 series used for?

The Honeywell T775 series are electronic temperature controllers for commercial boiler control, HVAC, and industrial process temperature management. They accept multiple temperature sensor inputs and provide relay and analog outputs for controlling boilers, pumps, valves, and dampers. Key models: T775U2006 (universal single-loop, 24/120/240 VAC), T775M2048 (dual loop), T775P2003 (boiler reset with pump output and 3 included sensors), T775M2014 (4 SPDT relays, NEMA 4X enclosure).

Related Categories

Commonly ordered alongside thermostats.

Boiler Controls Actuators Temperature Controls Pressure Switches Transformers Pumps & Motors

For emergencies, outside of business hours, call #901-604-7069