Wind, Sun, Snow.. Repeat: The Art of Weathering Chicago

🌡️ 1. Why Weather Fluctuations Matter

• Heating & Cooling Demand – Rapid changes between hot and cold days make HVAC systems cycle more often, using more energy.

• Humidity Swings – Humidity changes affect how hard cooling and dehumidification systems work.

• Peak Loads – Sudden heat waves or cold snaps create spikes in energy use, which can cost more if you’re on time-of-use or demand-based pricing.

⚡ 2. How It Impacts Energy Efficiency

Weather Issue

Impact

Example

Rapid Temperature Swings

HVAC runs more often & less efficiently

A 30°F night followed by a 70°F afternoon means your furnace and AC might both run in one day.

High Humidity

Increases cooling energy use

AC works longer to dehumidify the air.

Wind / Drafts

Heat loss or gain through leaks

Cold wind pulls warm air out of buildings.

Solar Gain

Extra heat load in summer, free heat in winter

South-facing windows can either cost or save energy depending on the season.