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Suggestions

Lowering your business’s energy consumption—and your bill—generally boils down to two factors: reducing your equipment wattage and reducing your equipment run time.

Here are some suggestions on how to accomplish these reductions:

  1. Contact your PSNH Account Executive for assistance. Your PSNH Account Executive can recommend energy efficiency measures and incentive programs available through PSNH.
  2. Appoint an “Energy Champion” in your organization who will understand and be responsible for:
  3. Incorporate energy efficiency measures
    • Upgrade lighting systems to newer technologies and add controls
    • Review compressed air system and add controls
    • Install energy efficient motors and add controls
    • Install efficient ventilation and cooling systems (HVAC) and add controls
    • For information on qualifying for rebates for these and other energy efficiency measures, see Programs & Incentives 

  4. Install energy management systems
  5. Energy management systems (EMS) conserve energy by adjusting operating hours and/or cycling equipment. EMS devices range from simple on/off time clocks controlling a single system, to sophisticated computerized controls that manage all the energy-consuming systems in a building.

    Single function EMS units can cost as little as $100, while complex systems can cost more than $100,000.

    EMS cost savings vary according to the load being controlled. Typically, they can help reduce energy costs 10 to 30 percent, with payback periods usually less than two years.

    Types of EMS Systems  

    Time-of-Day Scheduling
    Temperature/Time Optimization
    Demand Control Systems 

    Applications
    Not every business can benefit from the more sophisticated EMS. Weigh the cost against potential savings before determining the type and level of sophistication warranted. Before investing in a system, you should conduct an in-depth analysis and inventory of your facility's lighting, HVAC systems, and interruptible or deferrable loads. Other major factors to consider include building type, size, nature of business, and number of systems to be controlled.

    Let Us Help
    Your PSNH Account Executive can help you identify EMS opportunities and recommend the appropriate technology to control your electrical loads. Our state-of-the-art meters can measure electrical loads, equipment duty cycles, and other measurements necessary to evaluate the feasibility of an EMS.

Time-of-Day Scheduling:

This type of system uses electro-mechanical time clocks to control various functions according to time schedules. Ideally, these systems take into account holidays, weekends, daylight savings time, and planned maintenance, and also have an override feature.

They usually control:

  • Interior and exterior lighting
  • Security lighting
  • Space heating systems
  • Air conditioning
  • Ventilation and exhaust fans
  • Thermostat setbacks and setforwards

Temperature/Time Optimization

These systems provide for the control of multiple functions and more sophisticated control of temperature setback/setforward. Inside and outside air temperature are monitored and used accordingly to vary the time of startup or setback of heating and/or air conditioning. These systems achieve additional savings by using the least amount of energy to produce comfortable conditions during occupancy.

Depending on the complexity of the system, an economizer cycle can also be incorporated. By controlling air dampers, this cycle brings outside air into the cooling system whenever possible.

Demand Control Systems

With these systems, all of the functions of temperature/time optimization and time clock controls are incorporated in a system that also controls electricity demand by cycling pre-selected loads on and off as demand approaches preset limits.

Typical interruptible loads are heating, ventilation and air conditioning (HVAC) systems; air compressor motors; and manufacturing processes that can readily be interrupted or delayed. In addition to generating energy savings by shutting off unnecessary loads, these systems reduce monthly peak demand charges on electric bills.

Demand control systems provide for a large number of control and monitoring points. They also incorporate features such as the ability to monitor fire and burglar alarms, log internal environmental conditions, record equipment running time and duty cycles, and track energy use.