If the code where you live requires a heat detection device in the attic you will need to use a spot type heat detector.
Attic heat detector.
Smoke alarms are not designed for garages and attics and are much more likely to fail than a heat detector.
The us fire administration fema recommends that you have a heat detector rather than a smoke alarm in your garage.
Caution must be taken to prevent operating the nonrestorable fixed temperature element center disk during this test.
The heat detector is rated at 194ºf 92ºc temperature.
800 1 200 fpm 4 inches etc.
This item kidde hd200f heat detector for attic use kidde hd135f fyrnetics hardwire heat detector with battery backup hardwired heat alarm with battery backup brk brands hd6135fb.
Firex hardwired inter connectable 120 volt auxiliary heat detector 135 degree with battery backup the kidde firex hd135f is a 120 volt ac the kidde firex hd135f is a 120 volt ac wire in heat alarm that responds to temperature rather than smoke.
For most applications in homes and attached garages the hd135f can be used.
For every additional 400 feet per minute of air velocity the heat gun to detector spacing should be reduced by one inch e g.