Existing Building Systems Commissioning

The commissioning process can be applied to existing buildings that have never been commissioning to restore them to optimal performance. Existing building commissioning (EBCx) is a systematic, documented process that identifies low-cost operational and maintenance improvements in existing buildings and brings the buildings up to the design intentions of its current usage.

LFS EBCx focuses on energy-using equipment such as mechanical equipment, lighting and related controls and usually optimizes existing system performance, rather than relying on major equipment replacement, typically resulting in improved indoor air quality, comfort, controls, energy and resource efficiency.

EBCx includes an audit of the entire building including a study of past utility bills, interviews with facility personnel. Then diagnostic monitoring and functional tests of building systems are executed and analyzed. Building systems are retested and monitored to fine-tune improvements. This process helps find and repair operational problems. The identification of more complex problems are presented to the owner as well. A final report, EBCx plan and schedule are then given to the owner.

Energy Management

Energy Management includes monitoring, controlling, and conserving energy in a building or organization. The steps to a successful LFS Energy Management program are:

- Metering/monitoring your energy consumption and collecting data.
- Finding opportunities to save energy, as estimating how much energy each opportunity could save without affecting production and quality. These could be    no-cost behavioral opportunities such as temperature adjustments or preventative maintenance procedural improvements or capital improvement          opportunities such as HVAC or lighting upgrades.
- Prioritizing opportunities and taking action to implement and save energy.
- Tracking progress by analyzing your utility meter data to see how well your energy savings efforts have worked.

Energy Efficiency Retrofit projects

LFS Lighting and/or HVAC retrofit projects include a detailed scope of work and energy analysis, which covers the existing the proposed consumption of the lighting and/or HVAC system in question and estimated energy savings, material and labor costs, and available local or government incentives. The scope of work will be used as guide by a LFS engineer to assist installation contractors with the logistics and administration of the project.

Energy audits

LFS can provide a preliminary end use analysis of your facility or three different levels of energy audits (Level I, II,  and III), which were developed by the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE):

Preliminary End Use Analysis - All three levels of energy audits require a Preliminary End Use Analysis which involve the following:

  • A site visit to assess the building and energy consuming equipment.
  • Analysis of the utility bills to determine whether savings can be had by changing the utility rate.
  • A summary of utility bill data.
  • Calculation of energy use intensity (EUI).
  • Benchmarking to compare the site's energy usage to that of similar sites in the same region.
  • Estimate of the energy and costs saved if the building meets an energy use intensity target.

Walk-through Energy Audit (ASHRAE Level I) - a preliminary energy analysis that will identify energy efficiency measures while limiting the necessary engineering time and costs to produce the report. The estimated savings and costs associated with each measure are of rough order magnitude. The brief report focuses on low-cost and no-cost measures, although capital measures are identified when discovered. The report also includes a summary of utility data, the estimation of savings associated with a rate change, the calculation of the energy use index, benchmarking, and targeting.  

Detailed Energy Audit (ASHRAE Level II) - based on the results of the walk-through audit, this energy audit is more detailed and requires proficiency and thought to create a quality energy audit report. The detailed energy audit includes a complete description of the facility, including an equipment inventory, an energy balance, detailed energy savings and costs associated with each low-cost and no-cost measure, financial analysis of each recommended measure, identification and rough estimates of capital projects costs and savings, and a recommended measurement and verification plan for each recommended measure.

Investment Grade Energy Audit (ASHRAE Level III) - are designed to provide additional engineering rigor for more expensive capital projects  where risk is less tolerated. In these energy audits, trend logs and data loggers are used to better understand how the buildings react to changes in ambient conditions and occupancy.  Calculations for HVAC measures are done with hourly simulations. Detailed costing estimates are provided, as are life cycle cost assessments. Typically a scope of work and schematics are provided with the audit so that the contractors installing the measures understand exactly what is to be installed. The reports contain more detailed descriptions of the measures.