Ceramic kiln, ceramic kilns and ceramics kiln all describe the same equipment, and the real divisions in the market are elsewhere: electric or fuel-fired, top loading or front loading, and what electrical supply the machine needs.
Electric against fuel fired
Almost all studio and hobby kilns sold in the UK are electric, because they are clean, controllable and need no flue. Gas and wood kilns give reduction atmospheres that electric kilns cannot, which changes what glazes do, and they need siting outdoors or in a properly built kiln room. For most buyers the choice is made by the building rather than by the ceramics.
Top loading and front loading
Top loaders are cheaper for the same volume and easier to move, and they require leaning into the chamber to pack, which becomes tiring with a deep kiln. Front loaders cost more, pack like an oven and suit anyone with back trouble or a lot of flat shelves to place. Both fire identically; the difference is entirely in use.
What decides the size you can have
The electrical supply. A kiln limited to a standard thirteen-amp socket is capped at around three kilowatts, which sets a ceiling on chamber size and climb rate. Anything larger needs a dedicated circuit installed by an electrician, and that cost is real and never included in a kiln listing.
Buying new or used
Kilns last decades and used ones are common. What ages is the elements, the thermocouple and the brickwork, all of which are replaceable, and what is expensive to fix is a damaged shell. A used kiln from a known maker with replaceable parts is usually a better buy than a new unbranded one at the same price.
Questions people ask about kilns
Is a ceramics kiln different from a ceramic kiln?
No. They are the same machine and the phrases are used interchangeably by buyers and sellers.
Top loader or front loader?
They fire identically. Front loaders cost more and are far easier to pack; top loaders are cheaper and lighter.
Do I need a gas kiln?
Only if you want reduction atmospheres, which change what glazes do. Almost all hobby and studio kilns sold in the UK are electric.