Keystone KSTAW08INV-HC
Window
Summary
The Keystone KSTAW08INV-HC is a window that uses 414 kWh per year, costing approximately $66.21annually to run at the US average electricity rate. Over 10 years, that's $662.10 in energy costs alone. It uses 48% less energy than the federal minimum standard, earning ENERGY STAR's "Most Efficient" designation — the top tier of certified products. This is an exceptionally efficient model.
Ranked #115 out of 404 room air conditioners by annual running cost, it costs $30.79 less per year than the category average of $97.
How This Compares to Other Room Air Conditioners
Ranked #115 out of 404 in the room air conditioners category (by lowest annual cost).
Energy Details
Running Cost Breakdown
Estimated electricity costs at different time horizons (based on $0.16/kWh US average rate):
Actual costs vary by location. States like Hawaii ($0.43/kWh) pay significantly more while Idaho ($0.11/kWh) pays less. Use our energy calculator to estimate costs at your local rate.
What This Means for You
The Keystone KSTAW08INV-HC is cheaper to run than the average room air conditioner in its category. At $66.21/year, you'll save approximately $307.90 over 10 years compared to a typical model in this category.
With a high efficiency score, this model is one of the better options if minimizing long-term energy costs is a priority.
Energy costs are just one factor in choosing a room air conditioner. Consider the purchase price, features, reliability, and how the total cost of ownership (purchase price + energy costs over its expected lifespan) compares to alternatives.