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Energy Audits

Our trained auditors will thoroughly examine your site.  Among the items they identify:

Energy Saving Opportunities

Health & Safety Issues

  • Insulation
  • Airsealing
  • Windows
  • Advanced Boiler Controls
  • Appliances
  • Lighting
  • Thermostats
  • Moisture / Water Damage
  • Mold
  • Combustion Safety
  • Indoor Air Quality

Energy Audit Procedure

An energy audit consists of several steps (the process can vary according to the type of building or facility being audited):

Overview / Interview  (top)

When the CET auditor arrives at your site, he will first give you an overview of the audit process.  He will answer any questions you have, and address any concerns or potential problems up front.  We want you to understand the entire process – only with your participation can the audit be as effective as possible.  With the goal of achieving the best possible understanding of your situation, the auditor will ask you questions about the building, any particular problems or concerns you may have about it, and how you use it.

Appliance Metering  (top)

To get a residential audit underway, the auditor will usually ask your permission to connect your refrigerator to a power-consumption meter.  This device will monitor your appliance’s power consumption for the duration of the audit – the longer the monitoring time, the more accurate our estimate of monthly energy consumption.

Building Survey  (top)

The auditor will survey the building from attic to basement.  He will be measuring exterior surfaces and windows, noting insulation levels, potential air leakage sites, light fixtures, hot water fixtures, and any other energy-related features.  All windows will be closed and locked, and all other openings in the building closed, in order to leave the house in a “winter-like” condition – as tightly buttoned up as it would be on a cold winter night.  All of the information noted during this tour will serve as input for computer modeling of the building’s energy consumption, and will guide energy-efficiency improvement suggestions.

Blower Door Test  (top)

The blower door is a powerful tool for measuring a building’s air leakage rate and for locating many leakage sites.  After putting the building in a closed-up, “winter-like” condition, the auditor will install the blower door in an exterior doorway.  An expandable aluminum frame is fitted to the doorway, with a nylon panel mounted over the opening to seal it.  A sleeve in the panel holds the blower –a large, variable-speed exhaust fan with several calibrated pressure-measuring ports.  A sensitive digital pressure gauge is connected to the fan.  In a typical test, the fan is turned on, and its speed is increased until the building has been very slightly depressurized with respect to the outdoors.  By exhausting air from the building, the fan creates a lower-pressure zone inside, which causes outside air to leak in at an accelerated rate.  This situation yields two types of information.  By measuring how fast the fan must be set create a precise pressure drop within the building, the auditor can calculate the amount of outside air that would leak in under normal conditions – very useful for modeling the building’s energy consumption.  In addition, the low pressure created by the fan serves to exaggerate the building’s normal leaks.  Take a quick tour of the building with the auditor while the fan is running – chances are you’ll find previously hidden air leaks just by holding out your hand to feel the draft!  The blower door is an invaluable guide to airsealing efforts.

 

KW Management, Inc.
55 Lake Street | Nashua, NH 03060
Phone: 603-598-0181 | Fax: 603-598-5188
Email:info@kwmanagement.com

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