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Home TechTime December 2017 Electric Heaters

TechTime is a Neptronic publication aiming to inform you on the best ways to deal with common issues highlighted by our technical support team. Each edition features three new topics and will be posted on neptronic.com.

UL, CSA, and ETL Certifications
Knowing your Options

Standard Neptronic heaters are approved and certified by UL, CSA, and ETL. Certain components required by UL are not obligatory by CSA, or vice versa. Our heater selection software is programmed according to the certification being used. Based on your selection, the software will automatically add the necessary components, as per UL or CSA standards, and it will advise you with a pop up window.


Knowing the codes;




The obvious differences between the American (UL) and Canadian (CSA) selection is;


  • Power: Maximum kW/sq.ft
  • Automatic thermal cut out temperature rating
  • Manual thermal cut out temperature rating

Heating elements maximum kW per square foot (with flanged type)

Heating Element Type UL (kW / sq.ft) CSA (kW / sq.ft)
Open coil 24 40
Tubular 12 13
Finned tubular 13 15

Automatic thermal cut out temperature

Heating Element Type UL (⁰F) UL (⁰C) CSA (⁰F) CSA (⁰C)
Open coil 110 43 110 43
Tubular 125 52 167 75
Finned tubular 110 43 167 75

Manual thermal cut out temperature

Heating Element Type UL (⁰F) UL (⁰C) CSA (⁰F) CSA (⁰C)
Open coil 135 57 175 79
Tubular 175 79 200 93
Finned tubular 175 79 200 93