Household Heaters North America UL 1278 Testing

A heater refers to a device used for heating Based on different heating media and principles heating equipment can be generally classified into

- Gas heaters

- Electric heaters

- Boiler heating systems

- Electric wall-mounted boilers

However for such products to be listed on the US Amazon platform they must undergo UL 1278 testing

Applicable Product Scope

UL 1278 is the standard for movable wall-mounted or ceiling-hung indoor electric heaters applicable to heaters with a rated voltage not exceeding 600V

It does not apply to fixed heaters duct heaters or central heating furnaces

UL 1278 Testing Items for Heater Certification

The UL 1278 standard includes the following test items

- Leakage current test

- Temperature rise test

- Durability test

- Short circuit test

- Overload test

- Component deterioration test

- Dielectric withstand voltage test

- Insulation resistance test

- Stability test for portable heaters

Latest Revision February 21 2022

The latest edition of the standard is

UL Standard for Safety for Movable and Wall- or Ceiling-Hung Electric Room Heaters UL 1278 2014 Ed4+R 21Feb2022

New Requirements in the Latest Version

The new UL 1278 standard introduces additional warning statements and labels to address surface overheating risks during normal heater operation However this requirement does not apply to products with a rated power below 850W excluding 850W

Relevant Standard Clauses

67 13 67 14 67 25 Figure 67 2 68 2 1 68 3 3 69 1 69 2 69 3

- 67 13 and 67 14 Household heaters excluding ceiling-mounted models must include overheating hazard warning statements which should be permanently marked on the front of the product in a visible position

- 67 25 Products with a rated power greater than 850W must have an additional hangtag with overheating hazard warnings.