The HVAC Performance Monitoring (HPM) service remotely detects, analyzes, and notifies consumers about HVAC performance issues using patented cloud-based analytics, algorithms, and pattern recognition. The early warning service is delivered through the company’s SaaS energy analytics platform. The software detects various levels of performance degradation. Regular reports are provided with information that can be distributed to consumers. The company’s application-programming interface (API) can be used to integrate the notifications into existing customer communications infrastructure. Extensive customer support tools can integrate with current energy audit programs and help increase customer engagement and satisfaction. Utilities and service providers can gain a customizable service for deployment on their own mobile and/or Web applications.