What is the difference between the 21 type heater and the ordinary one?

Typically, the installation size of regular space heaters on the market is mostly 30x30cm.

If your home already has a ventilation fan installed, additional construction to enlarge the installation hole is required for installation.

Previously, the editor introduced many features of the "21 type" space heater. So, what does "21 type " actually mean?

"21 type " refers to an installation size of 【21x21cm】.

Since the common ventilation fans installed in bathrooms at home also have the same opening size (21x21cm), the 21 type space heater can replace the ventilation fan directly, eliminating the need for complicated construction processes and saving time. Upgrading to a space heater is no longer a difficult task!