Thermolec Open Coil heaters are designed for use in all forced air commercial and industrial HVAC systems. Their applications vary from a partial or auxiliary nature to being the principal heat source in a building.

Commercial Grade Steam Humidifier Acu-Steam Pro humidifiers produces humidity from steam dispersed directly into the air usingelectric elements immersed in water. By using resistive elements a wide range of water conditions can be used to generate sterile steam quickly and efficiently in a permanent stainless steel tank. Available in capacities from 12 to 50 lb/hr.

The Latest in Technology for Conversions to Electricity or DUAL-ENERGY The Thermolec Plenum Heaters are the result of several years of research and development. Their components have been carefully selected to guarantee a product of highest quality, durability and performance. Thermolec’s constant attention to detail and quality control provide you with the most reliable plenum heater availabl...

Acu-Steam Steam Humidifiers are another quality product by Thermolec, an industry leader in comfort heating products. Its compact size and standard features make it the easiest to install, operate and maintain. Available capacities from 4.8-12.8 lb/hr (2.2-5.9) kg/hr) in On/Off operation or optional modulating controls. With self-cleaning elements enclosed in a quick release stainless steel tank t...

A chart showing the different boards we offer along with some key details for each one (input, compatibility, etc.)

Steam Humidifier for ductless locations Thermolec’s Acu-Steam humidifier line has a new companion. To be able to provide the power of steam for houses and condos without duct work, we developed the Split Steam which has a steam generator and a steam distribution module which contains a quiet fan to gently distribute the sanitized steam into your environment. Split-Steam Humidifiers are the evolut...

Mini Fresh Air Make-up Today's airtight homes and offices beg for fresh air. When we trap the heat, excess humidity and indoor pollutants such as cleaning products, smoking and pets, will negatively affect the quality of the air we breathe, making our environment both uncomfortable and unhealthy. The ventilation code for new construction requires the installation of a system to provide adequat...

High Performance, Compact Design The Thermolec TMB electric boiler is our newest and most affordable model. Without compromising quality, Thermolec has engineered the TMB with quality components and state of the art technology. Designed for all types of hot water heating systems, including applications requiring 190ºF water temperatures.

Thermolec manufactures tubular element heaters for applications which involve personnel safety or critical conditions in the duct such as high humidity level, combustible dust or corrosive atmosphere.

Zone Heater The THERMO-ZONE heater provides accurate temperature control in every room. Equipped with the most advanced modulating controller and air sensor, the THERMO-ZONE heater will operate with extremely low air flow (see specifications). This unit uses the minimum amount of energy to meet the heating needs. It also measures the air flow and adjusts it's heating capacity accordingly. The TH...

Fresh Air Heater Today's airtight homes and offices beg for fresh air. When we trap the heat, excess humidity and indoor pollutants such as cleaning products, smoking and pets, will negatively affect the quality of the air we breathe, making our environment both uncomfortable and unhealthy. Stale and humid air has to be replaced by fresh air. During winter, the incoming fresh air is at too low...

Today's airtight homes and offices beg for fresh air. When we trap the heat, excess humidity and indoor pollutants such as cleaning products, smoking and pets, will negatively affect the quality of the air we breathe, making our environment both uncomfortable and unhealthy. The ventilation code for new construction requires the installation of a system to provide adequate fresh air. During wint...

Make-up Air units up to 2,500 cfm with the NEW Model NER from Thermolec. The NER unit provides a compact footprint making make-up air units easier to stock, handle and install - a convenience contractors have come to expect from Thermolec. The NER’s full array of features offers a great sales opportunity for contractors including a full range of kW options and the ability to raise outside air t...

Dual-energy boilers for fossil fuel backup or standalone installations. Cozy comfort and improved efficiency while saving you money. Feel the comfort of hot water heating controlled by advanced electronics. Standard models now include great features like a modulating electronic controller with outdoor sensor as well as integrated load management control. Modulating control with solid state relays...

The automatic reset thermal cut-out is a fixed temperature disc type safety device that opens the control circuit when it’s set point is reached. It automatically resets and returns the heater to operating conditions when the overheating conditions have disappeared.

It offers additional protection against overheating. It is standard on heaters of 30 KW and less and not in excess of 300 volts, and optional on all others. This switch must be manually reset to make the heater operational.

A built-in control transformer is required on most heaters to supply 24 volts to the control circuits. A Class II transformer has built-in safety protection and does not require primary fusing. Primary and secondary fuses can be supplied upon request.

Magnetic contactors are used for stage switching and/or back-up for safety devices. Approved for 250,000 cycles. Magnetic contactors are cost effective and safe.

Used to protect the total load or individual stages. High Rupture Capacity type (HRC Form 1).

A built-in disconnect switch allows heaters to disconnect individually in order to perform maintenance tasks. It is a positive and inexpensive way to meet the safety rules. It also reduces the electrical installation costs because the disconnect switch is factory installed. Thermolec strongly recommends that a built-in disconnect switch be specified at all times.

Safety feature, monitors the quantity of air flowing through the heater, adjusts the heater’s capacity to match the air flow available and shuts the heater down in case of a total loss of air. This feature is available only on heaters equipped with full SCR.

A pressure differential switch is used to prevent a heater from operating if there is no airflow across the heating elements. The switch is provided with a pitot tube to be installed into the duct, which makes it sensitive to velocity pressure as well as to static pressure. In applications where there is not enough pressure to activate a differential pressure switch, an electronic air flow sensor ...

Mercury contactors are used for stage switching. Advantages: silent operation. Exceptionally reliable. Long life expectancy (Tested for 1,000,000 cycles) Note: Mercury contactors are position sensitive, hence it is important to specify in which position the heater is to be installed.

Pilot lights are mounted on the control box to indicate that either a function of the heater is operating or a failure condition is present. The most commonly specified pilot lights functions are: power on, heating on, no airflow, overheating, stages on. The pilot lights' functions must be specified when ordering.

Solid State Relays are designed for controlling, silently and proportionally, a large amount of power in response to a pulsed signal (suitable for DDC, Direct Digital Control). They incorporate a dual SCR (Silicon Controlled Rectifier) to provide full-wave capability and Zero Crossing Drive Circuitry. The opto-coupler provides the interface to the logic level input signal and electrical input-to-o...

The D21-P electronic controller has been designed to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the control...

The D22-P electronic controller has been designed to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the control...

The D21-PS electronic controller has been designed to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the contro...

The D21-PSSR electronic controller has been designed to be a compact solution to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the ...

The D21-T electronic controller has been designed to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the control...

The D22-T electronic controller has been designed to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the control...

The D21-TS electronic controller has been designed to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the contro...

The D21-TSSR electronic controller has been designed to be a compact solution that takes full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below t...

The D35 pre-calibrated electronic controller is Thermolec’s most flexible controller with four different input options on a single board. Jumper configurations are clearly indicated on the label and may be changed at any time. Control signals supported are Thermistor for Thermolec’s RT, DT or RADS, 0-135 Ohms, 4-20 mA and 0 - 10 VDC. Since the D35 is not compatible with our Air Flow Sensor it is r...

Hybrid sequential Step Controller The D46 hybrid sequential step controller is designed to be used where fine control accuracy is required and the heater capacity is too high to be handled economically by "FULL SCR". With a combination of a smaller SCR and a step controller, both being controlled by the same input signal the SCR stage automatically fills the gaps between the step controlled stage...

Pneumatic-electronic transducer. The P37 is a Pneumatic-electronic transducer that converts a 2-13 psi input into a proportional Pulse or 0-10VDC output and therefore replaces both the P35 and P36. For ease of use the board is programmed for 3-8 psi Pulse output selectable from the MODE DIP SWITCHES in Direct or Reverse Acting mode. Custom pressure ranges can be adjusted in the field with qualifi...

Electronic Sequencer The TH34 electronic sequencer has been designed as a compact solution to replace bimetallic mechanical sequencers to split loads into smaller delayed sequences. When the thermostat contact closes, Q1 is instantly activated and then Q2 to Q4 after approximately 20 seconds per sequence (timing may change without notice). This controller is ideal for residential installations to...

0-10 VDC Thermostat This thermostat can be used as a room stat or a duct stat with the optional DS600 sensor.

This thermostat can be used as a 1 or 2-stage duct stat with the DS600 sensor.

Duct sensor The DS-600 is a thermistor based duct sensor designed to work with Thermolec’s thermostats and electronic controllers to modulate the heater’s capacity according to the heat required. In most cases the DS-600 is used with Thermolec’s 0-10 VDC Room Thermostat to allow it to function as a duct stat. It can also be used as a remote duct sensor with our ‘T’ versions of controllers such as...

AcuSteam High Limit cutoff Thermolec’s exclusive ACE SENSOR monitors the conditions in the duct to prevent excessive buildup of humidity. It is included with every AcuSteam Pro and may be used with the residential AcuSteam as an option. The high limit cutoff is adjustable from 80 to 90% RH.

Electric Vehicle Energy Management System 30A/40A/50A/60A The DCC-9 is a patented Electric Vehicle Energy Management System (EVEMS) that allows a charger to be connected directly to the main power supply of a multi-unit residential building (MURB) dwelling, which would otherwise not have sufficient capacity to allow the connection.

Electric Vehicle Energy Management System 30A/40A/50A/60A The DCC-10 is a patented Electric Vehicle Energy Management System (EVEMS) that allows a charger to be connected directly to an electrical panel which would otherwise not have sufficient capacity to allow the connection.

Electric Vehicle Energy Management System 30A/40A/50A/60A The DCC-11 is a patented Electric Vehicle Energy Management System (EVEMS) that allows a charger to be connected directly to the main power supply of a multi-unit residential building (MURB) dwelling, which would otherwise not have sufficient capacity to allow the connection.

Electric Vehicle Energy Management System The DCC-12 is a patented Electric Vehicle Energy Management System (EVEMS) that allows a charger to be connected directly to an electrical panel which would otherwise not have sufficient capacity to allow the connection.