A single stage electric snowblower is a good option for clearing less than four inches (about 10 centimeters) of snow from a deck or porch. It requires use of an outdoor power cord. A single stage gas snowblower is best for clearing less than eight inches (about 20 centimeters). A dual stage gas snowblower is ideal for clearing medium to heavy snowfall greater than eight inches (approx. 20 centimeters).