YES!! A drafty pet door that leaks air into or out of your home will raise your energy bill. Even more so if you live in a climate that has extreme hot or cold weather throughout the year. With cold weather right around the corner you might be looking for the best pet door for winter. Read this taken directly from the Energy Star website:
More than any other time of year, you notice your home’s air leaks in the winter. Most people call these air leaks “drafts.” You may feel these drafts around windows and doors and think these leaks are your major source of wasted energy. In most homes, however, the most significant air leaks are hidden in the attic and basement. These are the leaks that significantly raise your energy bill and make your house uncomfortable.
If your looking the best pet door for the winter months be certain to find one that seals and allows zero air infiltration. It is a fact that Freedom Pet Pass pet doors reduces air infiltration over 190% better than the competition and reduces thermal loses by 35%. An Energy Star home sealing engineer tested the Freedom Pet Pass against the worlds best selling pet door to find this out and more… read full report