In the short term the answer is YES
In the long run you may want to think about ?
1. Seasonal variations of temperature aka summer to winter, day & night etc effecting grow room area !
2. Lights on & off cycle, lights on extra heat for an example... i run lights on during real life night time when temps are cooler others wise if lights where on during day time & i may add in the middle of summer, temps would be much higher !
3. Cold roots stunt growth... garage ah more likely a concrete floor, insulate bottom of grow tent from garage floor with polystyrene sheeting a couple of inches thick for example.
4. Temps below 15c stunt growth, might be problem during lights off & seasonal average temp depending on what part of world ya in ?
Might want to think about running as heater during lights off if temps drop below this point.
5.. RH aka relative humidity ya don't want it over 80% for a long period of time & mainly in flowering as it may produce bud rot ! so a dehumidifier may help.