Patent ID: 11841168

Abstract:
A wall mountable electric heater comprises a core 20 arranged in a casing 2 with a convection space 50 defined between opposed surfaces 47, 27′ of the casing and the core. The opposed surfaces are provided with oppositely directed protrusions 26, 44 which are spaced apart in two dimensions and arranged in-between one another to form a serpentine flowpath. The protrusions 44 in the panel 4 of the casing define recesses 43 which extend inwardly towards the core, each recess having a base wall 46 in which a perforation 48 is formed between the first and second sides 40, 41 of the panel 4, The air flowing upwardly through the convection space 50 generates a pressure differential across the first and second sides 40, 41 of the panel 4, drawing air in through the perforations 48 to increase the mass flow rate of the air in the convection space. The base wall 46 of each recess may be spaced apart from the opposed, outwardly facing side 23 of the core by a relatively small distance D1, increasing the velocity of the airflow and hence the pressure differential proximate the perforation 48.