Navigate technical challenges with confidence with our troubleshooting section. Explore comprehensive guides and Frequently Asked Questions to resolve issues and keep your systems running smoothly.

Electric Duct Heaters

Plenum Heaters

Make up air

Electric Boilers


Frequently Asked Questions

Explore our Frequently Asked Questions to find quick and helpful answers to common inquiries.

What certification standards does Thermolec comply to? +

Thermolec is certified under CSA, CSA/US and UL standards. We also carry H-Stamp and National Board certifications for our electric boilers.

What are the minimum recommended air flow values for open and tubular/sheathed elements? +

It is recommended that the minimum air flow across the elements is 300 FPM (1.52 L/S) for open element heaters and 500 FPM (2.53 L/S) for tubular/sheathed elements.

What is the pressure drop across open and tubular/sheathed elements? +

The pressure drop can be estimated by referring to the Pressure Drop Chart included in the technical notes document on our website. These values are under the guideline that the depth of the element frame is 10” (254mm).

Can any thermostat be used with Thermolec heaters? +

Thermolec can provide thermostats with any given heater upon request. If a different thermostat is to be used, make sure that the output capabilities of the thermostat is compatible with what was ordered. • Active 0-10VDC signal for modulating heaters (Similar to Thermolec’s CTH-291) • Passive Thermistor output for modulating heaters (Similar to Thermolec’s DT-1040 and RT-1030) • Active 24VAC output for staged ON/OFF heaters (Similar to Thermolec’s CTH-010 or CTH-294) • Standard dry-contact thermostats for staged ON/OFF heaters.

What is an electronic air flow sensor? +

The electronic air flow sensor was designed specifically for VAV and CAV applications where the air flow may be too low, even below the recommended air flow. This is to be used in collaboration with modulating controls.

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