As we near the winter months and temperature begins to drop across various parts of the world, Tesla owners living within cold climates will inevitably resort to their vehicle’s onboard climate control settings and seat heaters to stay warm. But understanding how much power each component consumes could mean the difference between going that extra mile, especially when driving in snowy conditions could rob upwards of 25% in range, and being stuck at a Supercharger longer than need be.

We take a look at the most optimal way to stay warm in your Tesla this winter, thanks in large part to the help of YouTuber and Model S owner, KmanAuto. He takes us an inside look on the amount of power Tesla’s SubZero Weather Package, and its heating and air conditioning (HVAC) system, consumes.

First, it’s worth noting that Tesla’s SubZero Weather Package is an optional add-on that includes the addition of seat heaters throughout the cabin, heated wiper blades, heated washer nozzles, and a heated steering wheel which Tesla later added into the package.