Entech’s S2 vs. Limited Capacity Controls: Best Boiler Controls for Chicago Buildings
Introduction: Why Boiler Controls Matter in Chicago
Chicago’s harsh winters and stringent building regulations demand reliable and efficient boiler control systems for commercial and multi-family properties. Whether you’re upgrading an older building or managing a modern one, choosing the right system ensures tenant comfort, regulatory compliance, and cost savings. This guide compares two leading options:
- S2: A cutting-edge, AI-powered control system that modernizes any building, including older ones.
- Limited Capacity Controls: A traditional, less flexible solution for legacy boilers.
We’ll explore their features, benefits, and suitability for Chicago’s unique climate and compliance needs, emphasizing that older buildings can also benefit from smart technology.
The Importance of Boiler Controls in Chicago
Extreme Weather: Chicago’s temperatures often drop below 0°F, requiring robust, adaptable heating systems.
Regulatory Pressure: The Residential Heating Ordinance mandates indoor temperatures of at least 68°F, while the Chicago Energy Benchmarking Ordinance requires annual energy reporting for buildings over 50,000 sq. ft.
Efficiency & Cost: With rising energy costs and sustainability goals, efficient systems are critical for long-term savings.
Entech’s S2: Smart Controls for Any Building

The S2 is a versatile, AI-powered system designed to optimize heating for both modern and older Chicago buildings. It seamlessly integrates with existing infrastructure, making it an excellent choice for retrofitting legacy systems or enhancing new builds.
Key Features
- Therma AI Optimization: Adapts to heating patterns, reducing energy use by up to 40%, even in older boiler systems.
- Robust Sensor Network: Monitors indoor/outdoor temperatures, water loss, and boiler performance for precise control.
- Smart Integrations: Compatible with Lochinvar, Laars, chillers, VFD pumps, and thermostats via Modbus/BACnet, ideal for upgrading older buildings.
- Durable Touchscreen Panel: Built to withstand harsh boiler room conditions.
- Infinite Data Storage: Simplifies compliance with energy benchmarking for all building types.
- Real-Time Alerts: Detects leaks, overheating, and other issues instantly, protecting aging infrastructure.
- Pro/Pro+ Services: Includes 24/7 monitoring, priority support, and extended warranties for peace of mind.
Best For
Any Chicago building, modern or historic, seeking maximum efficiency, compliance, and tenant comfort. The S2’s adaptability makes it perfect for retrofitting older systems without requiring a complete overhaul.
Limited Capacity Controls: Basic Controls for Legacy Boilers
Limited Capacity Controls are traditional systems designed for older buildings with steam or hot water boilers. While reliable, they lack the advanced features and flexibility needed for optimal performance in today’s regulatory and energy landscape.
Key Features
- Wireless Steam Control:
- Supports sensors for indoor temperature averaging.
- Basic outdoor override, scheduling, and runtime logging.
- Cold weather boost for sudden temperature drops.
- Hot Water Control:
- Supports wireless sensors, but with limited functionality.
- Hot Water Control:
- Basic outdoor reset for water setpoints.
- Night setback, morning boost, and boiler rotation, but no advanced automation.
Best For
Older Chicago buildings with legacy systems where minimal upgrades are desired, and advanced efficiency or smart features are not a priority.