ENVI Engineering offers Retro-Commissioning services through CenterPoint Energy’s  Commercial Retro-Commissioning (RCx) Program.  ENVI Engineering is a Qualified Retro-Commissioning Agent representing CenterPoint Energy.  The RCx Program is designed to achieve demand and energy savings in commercial facilities by evaluating facility’s HVAC and Lighting control systems and implementation of low-cost and/or no-cost measures.

This RCx Program is offered to customers in the CenterPoint Energy Service Territory.

– Detailed site assessment
– Analysis of utility bills
– Benchmarking of the building with respect to buildings of similar characteristics
– Development of energy conservation measures list
– Calculated potential savings assuming conservation measures
– Verified and document implementation of energy conservation measures

Energy Audits

An energy audit is a systematic approach to building optimization, trouble shooting, decision making, and capital improvement planning. The primary goals of an energy audit are to qualify and quantify how the building energy systems are performing now, how that performance can be improved, and what will be the outcomes of those improvements for the Owner in financial and non-financial terms.

ENVI Engineering performs Energy Audits for Facility Owners as prescribed by ASHRAE.

ASHRAE Level 1 – Walk-Through Analysis/Preliminary Audit

  • Interviews with site operating personnel
  • Review of the facility’s utility bills and other operating data
  • Walk-through of the Facility
  • Report detailing the findings and identifying recognizable efficiency opportunities

ASHRAE Level 2 – Energy Survey and Analysis

  • The Level-2 project starts with the findings from the Level-1 audit
  • Evaluates the building energy systems in detail to define a variety of potential energy-efficiency improvements – Building Envelope, Lighting, Heating, Ventilation, and Air Conditioning (HVAC), Domestic Hot Water (DHW), Plug Loads
  • Detailed analysis of energy consumption to quantify base loads, seasonal variation, and effective energy costs
  • Report describing recommended Energy Conservation Measures (ECMs) including no and low-cost measures, modifications to system controls and building automation, operational changes, and potential capital upgrades.

ASHRAE Level 3 – Detailed Analysis of Capital Intensive Modifications

  • Building Simulation Computer Program is used to accurately model the way the facility would respond to changes in the energy systems.
  • Data loggers installed temporarily to monitor the operation of pumps and motors, temperatures of affected spaces, lighting levels, switching behavior, and other factors.
  • Construction-grade cost estimating.