Descriptions for F24H and notes/indexes are displayed on this screen.


Note(s)
    The distinguishing feature of the air heaters covered by this subclass is that the heat is predominantly released to the air by convection, mostly by forced circulation of the air. The domestic stoves or ranges covered by subclass F24B, F24C may also be fired or electric air heaters but they release their heat to a considerable extent by radiation and only to some extent by natural convention [3]In this subclass, the following terms or expressions are used with the meanings indicated:
      "water" includes other liquids and means always the liquid to be heated;—"air" includes other gases or gas mixtures and means always the gas to be heated;—"furnace tubes" means tubes inside the heater wherein combustion is performed;—"fire tubes" means tubes inside the heater through which flue-gases flow from a combustion chamber located outside the tubes;—"heater" means apparatus including both heat generating means and means for transferring the generated heat to water or air 
    All storage heaters are classified in group F24H 7/00 

Subclass indexes

WATER HEATERS

1/00

AIR HEATERS

3/00

FLUID HEATERS USING HEAT PUMPS

4/00

COMBINED WATER AND AIR HEATERS

6/00

STORAGE HEATERS

7/00

FLUID HEATERS FOR EXTRACTING LATENT HEAT FROM FLUE GASES

8/00

DETAILS

9/00

CONTROL

15/00