QMark Thermostats & Controls

Control your comfort with easy-to-use features and money-saving controls.

Wall thermostats are a snap to install and easy to program for convenient and smart energy savings.

Featured Thermostats

M601W/M602W

Best Sellers | Easy Installation and Control | Great Low Cost Solution

Description: Mechanical thermostats with snap-action type, suitable for apartment construction. Good thermostat for its value. Ideal for radiant cove heaters and baseboard. Models M601W and M602W have positive OFF. M602W has positive OFF. M601TPW and M602TPW have positive OFF. M611W and M612W offer a tamper-proof feature. M612W has Positive OFF. T100 and T200 feature a built-in heat anticipator for closer room temperature control.

MD26

Description: Mechanical thermostat with snap-action type, sensitive bi-metal construction. Large knob allows for easy adjustment. Model MD26 has Positive OFF.

CNTLTSTDNP1H1C

Advanced Comfort Control | Sleek and Modern Design | Accurate Low Voltage Solution

Description: Digital, Non-Programmable 24V thermostat with exceptional accuracy. Ideal for plenum heaters and HVAC systems. Features electronic switch, 2-wire connection, 40°F to 90°F temperature range, and +/- 1°F accuracy.

LTR2240

Direct Low Voltage Control for High Amp Loads | Allows for BMS Integration | Microprocessor Base Design

Description: Electronic relays designed for silent control of high voltage resistive loads from a low voltage control circuit. Compatible with 24V thermostats. LTR2240 is a dual silent relay with 25A 1HP at 208V/240V, and +/- 1.5°F differential. Can be used with model LT186F01 electronic room sensor or tied to building management systems.

SMARTSERIES® PLUS Digital Touchscreen Control

SmartSeries Plus is the first digital touchscreen capable of running a fully-programmable internal schedule or connecting to a BACnet Building Management System.

Key Features:

Intelligent Controls for Intelligent Buildings: Connects to Building Management System using BACnet MS/TP protocol.
Reduced Operations & Maintenance Time: Use of BMS saves facility manager time and reduces personnel costs.
Control at your Fingertips: Built-in 7-day programmable scheduling feature with occupancy settings for different temperatures.
Lockable Key Pad: Protects the unit from unauthorized access and/or tampering.
Temperature Override: Temporary override allows users to set a temperature above programmed setpoints for up to 4 hours.

Product Compatibility Matrix

The following table outlines the compatibility between QMark heaters and thermostats. '+' indicates compatible, '▼' indicates contact MEP, and '■' indicates see SKU Compatibility Chart.

Heater/Thermostat	TL8230A1003/U	TH106A	TH108PLUSA	TH114A240DBA	CNTLTSTDNP1H1C	CNTLSSPBMS	TH5220D1029	MS26	MD26	M601W	M601TPW	M602W	M602TPW	M611W	M612W	M600S*	M600MTP*	T100	T200	WT11A	WT12A	WR80	JC80EP	COS-E Series	SED Series	GFR	QTS	CDF	EFF	QCH	MUH	IUH	CUS900	MSPH	CONVECTORS	RCC	CP	FRP
TL8230A1003/U	+	+	+	+	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
TH108PLUSA	+	+	+	+	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
TH106A	+	+	+	+	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
TH114A240DBA	+	+	+	+	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
CNTLTSTDNP1H1C	■	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
CNTLSSPBMS	■	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
TH5220D1029	■	■	■	■	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
MS26	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
MD26	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M601W	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M601TPW	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M602W	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M602TPW	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M611W	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M612W	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M600S*	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
M600MTP*	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
T100	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
T200	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
WT11A	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
WT12A	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
WR80	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+
JC80EP	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+	+

Notes:

Programmable thermostats cannot be used with the models listed above.
Electronic thermostats have amperage minimums and each model has different voltage requirements; please check catalog thermostat specifications.
4 Series models require the removal of the internal thermostat from unit. Wire wall thermostat for proper fan operation. See model selection for specific thermostats.
Low voltage thermostats operate in conjunction with low voltage control systems using relays. Compatible with all standard 24V two wire thermostats.
The QTS watt units can use either single-pole or double-pole thermostats. The 1104 and 1504 watt units must use a double-pole thermostat (three conductors from thermostat to unit). Does not apply to low voltage thermostats, which need a transformer.
CDF and EFF Series models require different thermostats based on internal wiring. Wire wall thermostat for proper fan operation. See model selection for specific thermostats. Can not use digital thermostats with this unit.
Due to the complexity of wiring variations for remote wall thermostats with these products, it is recommended to contact Technical Services for assistance.

SKU Compatibility Chart

HEATER	THERMOSTAT
GFR1500T2F	TH106A, M601W, M611W, T100, MS26
GFR2004T2F	TL8230A1003/U, TH106A, TH108PLUSA, M602W, M612W, T200, MD26
GFR2404T2F	TL8230A1003/U, TH106A, TH108PLUSA, M602W, M612W, T200, MD26
COS-E Series	TH106A, M601W, M611W, T100, WR651
SED Series	TH106A, M601W, M611W, T100, WR651
CDF548	MS26, M601W
CDF542	MS26, M601W
CDF547	MS26, M601W
CDF558	MS26, M601W
CDF552	MS26, M601W
CDF557	MS26, M601W
EFF1500	MS26, M601W
EFF3007	MS26, M601W
EFF4008	MS26, M601W
EFF4004	MS26, M601W
EFF4007	MS26, M601W
EFF4804	MS26, M601W
EFF4807	MS26, M601W
EFF3003	M601W, M611W
EFF3006	M601W, M611W
EFF4003	M601W, M611W
EFF4006	M601W, M611W
EFF4803	M601W, M611W
EFF4806	M601W, M611W
EFF48483	M601W, M611W
EFF48483LV	M601W, M611W
QCH1101F	M601W, MS26
QCH1151F	M601W, MS26
QCH1202F	M601W, MS26
QCH1207F	M601W, MS26

Note: Programmable thermostats cannot be used with the models listed above.

Thermostats: Electronic Digital Line Voltage

Action	Type	Watt Rating	120v	208v	240v	277v	Pilot Duty	Temp. Range (°F)	Differential	Features
TH108PLUSA	Triac: Silent Operation	12.5A Resistive 2-wire SPST	N/A	N/A	3000 watts	N/A	No	40°F to 85°F	Accuracy: Within +/- 0.27°F	Digital, non-programmable 12.5amp model delivers exceptional accuracy. Ideal for radiant ceiling panels and baseboard. Not for fan-forced heaters.
TH114A240DBA	Electronic Switch	15 A Resistive 4-wire DPST	N/A	N/A	3600 watts	N/A	No	40°F to 85°F	Accuracy: Within 1°F of setpoint	Digital, non-programmable model delivers exceptional accuracy. Ideal for radiant ceiling panels and baseboard. Can be used for fan-forced heaters.
TH106A	Triac: Silent Operation	16.7A Resistive 2-wire SPST	Minimum: 2-amp load	2000 watts	4000 watts	N/A	No	40°F to 85°F	Accuracy: Within +/- 0.27°F	Digital, programmable high capacity model delivers exceptional accuracy. Ideal for radiant ceiling panels and baseboard. Can be used for fan-forced heaters and resistive loads.
TL8230A1003/U	Microprocessor	16.7 A Resistive 4-wire DPST	N/A	3120 watts	3600 watts	N/A	No	40°F to 85°F	Accuracy: Within 1°F of setpoint	Digital, programmable model delivers exceptional accuracy. Ideal for radiant ceiling panels and baseboard. Can be used for fan-forced heaters.

Thermostats: Electronic Digital Low Voltage

Action	Type	Watt Rating	120v	208v	240v	277v	Pilot Duty	Temp. Range (°F)	Differential	Features
CNTLTSTDNP1H1C	Electronic Switch	24V .015 - 1.0A @ 30V 2-wire	n/a	n/a	n/a	n/a	24VAC	40°F to 90°F	Accuracy: Within 1°F of setpoint	Digital, Non-Programmable 24V delivers exceptional accuracy. (Heat Only)
TH5220D1029	Electronic Switch	24V .015 - 1.0A @ 30V 5-wire	n/a	n/a	n/a	n/a	24VAC	40°F to 90°F	Accuracy: Within 1°F of set	Digital, Non-Programmable, 24V 2-stage 5-7 wire heat and cool thermostat. One-touch temperature control with exceptional accuracy. Ideal for plenum heaters, and HVAC systems.
CNTLSSPBMS	Electronic Switch	24V .015 - 1.0A @ 30V 3-wire	n/a	n/a	n/a	n/a	24VAC	40°F to 90°F	Accuracy: Within 1°F of setpoint	Digital, Programmable touchscreen two stage thermostat runs 2/3 elements on stage 1 and full heat for stage 2. Comes with BACnet MS/TP BMS compatibility, 7 day scheduling, cooling mode (Fan-Only), temporary override, vacation mode, and keypad lock.

Thermostats: Line Voltage

Action	Type	Watt Rating	120v	208v	240v	277v	Pilot Duty	Temp. Range (°F)	Differential	Features
MS26	Snap Action	SPST	22A	22A	22A	18A	No	50°F to 80°F	+/- 5°F	Economy thermostats, snap action type, used in apartment construction. Good thermostat for its value. Ideal for radiant cove heaters and baseboard.
MD26	Snap Action	DPST	22A	22A	22A	18A	No	50°F to 80°F	+/- 5°F	Model MD26 has Positive OFF. These bi-metal snap-action thermostats are sensitive. Large knob allows for easy adjustment.
M601W	Snap Action	SPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	+/- 4°F	Same as M601W and M602W except the cover mounting cover offers a tamper-proof feature.
M601TPW	Snap Action	DPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	+/- 4°F	Same as M601W and M602W except the cover mounting cover offers a tamper-proof feature.
M602W	Snap Action	SPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	+/- 2 12°F	Built-in heat anticipator assures closer control of room temperature.
M602TPW	Snap Action	DPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	+/- 2 12°F	Built-in heat anticipator assures closer control of room temperature.
M611W	Snap Action	SPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	+/- 2 12°F	Built-in heat anticipator assures closer control of room temperature.
M612W	Snap Action	DPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	+/- 2 12°F	Built-in heat anticipator assures closer control of room temperature.
M600S*	Simultaneous switching (double ckt)	DPST	22A	22A	22A	18A	Yes 125VA	50°F to 80°F	Accuracy: Within 3°F of setpoint	Simultaneous control of two heating loads. Used where the total load slightly exceeds capacity of a single switch, where two thermostats are impractical. Both switches are calibrated to operate at approximately the same temperature.
M600MTP*	Modulation (2-stage)	DPST	22A	22A	22A	18A	Yes 125VA	45°F to 75°F	Accuracy: Within 3°F of setpoint	One thermostat controls two separate heating circuits and reduces input during light load periods. Second stage activates when temperature drops to approximately 1-1/2ºF below the first stage turn-ON temperature.
T100	Snap Action with Heat Anticipator	SPST	22A	22A	22A	18A	Yes 125VA	50°F to 90°F	+/- 2 1/2°F	Line voltage thermostat with everything; Performance, reliability, durability, and a large knob. Built-in heat anticipation assures close temperature regulation. Large knob for easy rotation.
T200	Snap Action with Heat Anticipator	DPST	22A	22A	22A	18A	Yes 125VA	50°F to 90°F	+/- 2 1/2°F	Line voltage thermostat with everything; Performance, reliability, durability, and a large knob. Built-in heat anticipation assures close temperature regulation. Large knob for easy rotation.

Controls: Specialty Controls

Action	Type	Watt Rating	120v	208v	240v	277v	Pilot Duty	Temp. Range (°F)	Differential	Features
WR80	Snap Action Switch	SPST	25A	22A	22A	18A	Yes 125VA	20°F to 80°F	+/- 3°F	Rugged design for garages, factories, warehouses and similar commercial and industrial installations. The WR80 can control several heaters by using an external contractor.
JC80EP	Snap Action Switch	SPST	25A	22A	22A	22A	Yes 125VA	20°F to 80°F	+/- 3.5°F	This explosion proof room thermostat is suitable for Class 1, Group D and Class II, Groups E, F, and G locations.
WT11A	Positive snap action switch	SPDT	25A	25A	25A	22A	Yes 125VA	40°F to 110°F	+/- 3°F	NEMA 4X rated. The control has a SPDT output and can be used for heating or cooling (ventilation). Multi-positional mounting offers flexibility in new or existing installations.
WT12A	DPST	NEMA 4X rated	25A	25A	25A	22A	Yes 125VA	40°F to 100°F	+/- 3°F	Nema 4X weatherproof enclosure. The control has a SPDT output and can be used for heating or cooling (ventilation). Multi-positional mounting offers flexibility in new or existing installations.
LTR SERIES	Electronic Relays	Microprocessor base design	LTR1120: 120V; 22A	LTR208240: 208V/240V; 22A	LTR208240: 208V/240V; 22A	LTR1277: 277V; 19A				These electronic relays have been designed for silent control of high voltage resistive loads from a low voltage control circuit. Inductive motor loads can also be controlled (120V to 240V only). Compatible with 24V thermostats. The relays can be used with model LT186F01 electronic room sensor, providing proportional and integral control. Also can be tied to building management systems.
LTR2240	Dual Silent Relay	Resistive Inductive	N/A	25A 1HP, 8.8A	25A 1HP, 8A	N/A	Yes 125VA	20°F to 140°F	+/- 1.5°F	This dual level temperature relay may be used to operate two separate heating loads by means of a single low voltage thermostat. Relay is mounted in an enclosure.
TC1	Enclosure protection for thermostats.	Material: Impact resistant polycarbonate. Clear. Dimensions are: 7" L x 4.28" H x 2.75" D								Thermostat enclosure kits are designed to protect the thermostat. Circulating slots allow airflow for proper operation. Guards are lockable and a key is provided to maintain security.
M600THW	White thermostat cover with built-in thermometer. For M600 Series.									Minimum 50pcs. Allow 4 weeks.
M600THB	Beige thermostat cover with built-in thermometer. For M600 Series stats.									Minimum 50pcs. Allow 4 weeks.

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