I'm in the market for a new range hook to replace the broken one. The
current one is a single fan 60cm x 50cm (recirculate type, i.e.
non-ducted) fitted under the cupboard, naturally the replacement will
be the same size or else it won't fit.

I'm thinking of getting a dual fan model this time, but unsure if it
will make a huge difference considering there's no duct. On average,
the dual fan ones cost 50% more than the singles, is it worth to go for
a dual?

I'm also wondering if the range hook can be repaired. I can hear some
buzzing sound when I switch it on, but the fan isn't spinning. Perhaps
the motor is gone due to too much grease got into the fan (I can still
push it but it won't start). It's around 5 years old, maybe that's the
life span?

Thanks in advance for your input.