Calculate estimated energy and cost savings for energy- and water-efficient product categories using interactive calculators on Energy.gov, provided by the Federal Energy Management Program or ENERGY STAR^®.

These guides present facility and energy managers with general project planning guidance as well as financial payback metrics for the most common energy efficiency measures, providing a practical roadmap for effectively planning and implementing performance improvements for existing buildings.

• Office buildings
• Retail buildings
• Grocery stores
• K-12 schools
• Healthcare facilities

The ENERGY STAR Portfolio Manager is a secure, online tool that allows you to measure and track multiple energy use metrics.

• Gather data using the provided data collection worksheet.
• Data from the worksheet can either be manually entered or uploaded via spreadsheet or online web service.

Efficiency NOW is an online web portal provided free of charge to all Ameren Illinois business customers that offers helpful energy efficiency tools and resources.

Get started with online registration at Efficiency NOW. Once account information is confirmed, a confirmation email will be sent and you'll have access to the following tools:

• The Facility Assessment Wizard is a user-friendly, self-assessment tool requiring a minimal level of data and time to complete. You'll receive a full report including links to additional resources.
• The Commercial Energy Efficiency Recommendations page provides quick reference with general recommendations based on three inputs: Business Segment, Energy Use, and Climate Zone.
• The Lighting Calculator will show annual operating comparisons and savings based on simple inputs and straightforward drop-down options. Operating hours and electricity costs can be adjusted for customization.

Visit our Education & Training webpage to learn about educational opportunities available to Ameren Illinois business and non-profit customers. From live training webinars and classroom events to our archive of past training webinars, our events are designed to help you learn about a variety of energy efficiency topics from industry experts.

Learn how business customers across Illinois are using less energy and spending less money through Ameren Illinois' energy efficiency programs by visiting our Customer Case Study library.