Depends on what wattage you have coming, best is have a digital thermometer w/ probe on their level, might be a little hard to check since it’s infrared heater and adjust height accordingly.I will be receiving my new sweeter heater ( hopefully tomorrow ). My chicks are out in the garage in the PNW. We are still at about 30-35* lows at night. How far above the chicks heads should I have this to start? My chicks are 1 week.