Natural Resources Canada provides a list of conditions that must be in place for an EnerGuide evaluation. Making these preparations will help to ensure the most accurate testing possible.

For the sake of minimizing the inconvenience to a homeowner and to most effectively perform the evaluation, the Energy Advisor will consult with the client to arrange for the following preparations before the day of the test:

• Access - Provide a clear path to all attic spaces, crawl spaces, mechanical equipment and other hard-to-reach areas. Your energy advisor and/or the service organization can specify which areas will need accessibility.
• Heating - At the time of the evaluation, the home must have (at minimum) a space heating system that can keep the interior living space at 22 degrees Celsius. NOTE: Fuel fired HVAC and hot water systems will need to be turned off to avoid any combustion spillage.
• Windows and doors - All windows and doors must be in place. (A maximum of one window or door may be missing as long as it is temporarily covered and air-sealed.) Broken window panes must be air-sealed with materials such as taped polyethylene for during the blower door test. Close all windows and doors properly to ensure the test is accurate.
• Interior Spaces - All interior doors and/or windows should be open during the testing. Chimney flue dampers should be closed.
  
• Envelope - The building envelope - which includes ceilings directly below the roof and attic spaces, exterior walls, exposed floors, windows and doors - must be intact, including interior and exterior surfaces. If the exterior finish is not intact, the home cannot be evaluated. If any temporarily air-sealed location fails during the blower door test, your home cannot be evaluated. The energy advisor will note these details. Any renovations underway within the house can affect only interior partitions and may not break the building envelope.
• Foundation - Your home must rest on its permanent foundation or be a permanently moored float home.
• Power - The blower door test equipment needs a supply of standard AC electrical power. If power is not available from a utility, arrange for a suitable power supply and tell the service organization about this situation.
• Water and sewer - Potable water must be supplied by the municipality or from private wells or cistern systems. Sewer service must be provided by the municipality, a private septic system or a holding tank (outhouses and bio-toilets are permissible as toilets).
• Operating kitchen - Kitchen space must include a sink, an operating stove (i.e., no portable devices) and a minimum of six square feet (0.5 square metres) of counter space or evidence of future intent to install a permanent counter (i.e., not just a kitchen table).
• Wood-burning appliances: remove all ashes from any wood-burning appliances so they're not drawn into the house during the blower door test.