Lochinvar & A.O. Smith 100157702 Outdoor Air Reset Control

Lochinvar & A.O. Smith 100157702 Outdoor Air Reset Control

The Lochinvar & A.O. Smith 100157702 Outdoor Air Reset Control is a precision boiler control designed to maximize heating system efficiency by automatically adjusting boiler supply water temperature in response to changing outdoor air conditions. By modulating water temperature based on real-time outdoor readings, this control reduces unnecessary fuel consumption, extends equipment life, and delivers consistent comfort throughout the heating season.

How Outdoor Air Reset Works

Outdoor air reset (OAR) control is a proven strategy in hydronic heating systems. As outdoor temperatures rise, the demand for heat decreases — and the control responds by lowering the boiler’s supply water temperature accordingly. This prevents the boiler from operating at unnecessarily high temperatures during mild weather, resulting in meaningful energy savings and reduced thermal stress on system components.

Key Features & Benefits

• Designed as a genuine OEM replacement for compatible Lochinvar and A.O. Smith boiler systems
• Automatically adjusts boiler water temperature based on outdoor air temperature readings
• Improves overall system efficiency and reduces fuel costs
• Helps extend boiler and heat exchanger service life by minimizing thermal cycling
• Supports consistent, comfortable heat delivery across varying outdoor conditions
• Direct OEM part — ensures proper fit, function, and reliability

Application

The 100157702 Outdoor Air Reset Control is intended for use with compatible Lochinvar and A.O. Smith boiler models. Always verify compatibility with your specific boiler model and serial number before installation. Installation should be performed by a qualified HVAC or plumbing professional in accordance with local codes and the manufacturer’s instructions.

Why Choose OEM Parts?

Using genuine Lochinvar & A.O. Smith replacement controls ensures your boiler system operates as designed. OEM components are engineered to exact specifications, providing reliable performance and protecting your equipment warranty.