I think a lot of guys on here will take a massive dump on you for wanting to remuster/transfer into SAR tech from fire fighting. A lot of people get into the fire trade for the certs then piss off, thus screwing those who want to get on for the long run.
SAR Tech is very very very physically and mentally challenging.
It's not for everyone. Most guys that to remuster/transfer into the trade have a lot of experience and tours under their belts (usually infantry guys or artillery ).
The trade is closed off to the general public.
I heard that SAR techs are trained to the paramedic level which is cool.
It's a demanding trade and it's not easy to get into because you have to be in Olympic shape and be mentally strong.
I don't think it would be easy to remuster/transfer from fire to SAR tech.
I recommend you check out the info posted on army.ca forum (beware of the massive trolling)
And the forces website for some background on what the job entails.
If SAR tech is you thing you gave to pay your dues.
Hope that helps