Enter your garage heater's wattage and typical use pattern to see real running cost for keeping a workshop warm.
High-wattage garage heaters (5000W+) often need a dedicated 240V circuit — check your electrical panel capacity before installing a larger unit.
Garage and workshop heaters are typically higher wattage than indoor space heaters since they're heating a larger, often poorly insulated volume of air, which makes per-hour cost noticeably higher. Insulating the garage door and sealing air gaps can meaningfully cut the hours needed to reach a comfortable temperature, directly reducing this cost.
Larger heaters (5000W+) commonly require a dedicated 240V circuit rather than a standard 120V outlet — check the unit's electrical requirements and consult an electrician before installation.
Yes, often significantly — an insulated garage door and sealed gaps around windows and the service door can cut heat loss enough to reduce both the heater's runtime and the wattage needed to stay comfortable.