On Fri, 20 Dec 2019 09:38:06 +0000, Scott
wrote:

I found a 7 amp fuse. Can I fit it to my coffee filter machine, which
is rated at 1100 watts?

Am I correct in thinking that for applicances without a motor the
calculation is (volts) x (amps) plus (small margin) but for appliances
with a motor a much bigger fuse is usually needed because of surge
current when the motor starts?

For a purely resistive load like a heater, the power factor will be
very close to 1 so, as you say, you can use power = voltage x current.

You need to take power factor into account when dealing with
non-resistive loads like motors, but that's not an issue with a simple
heating element.