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www.rinnai.us • © 2010 Rinnai Corporation
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To ensure the ENERGYSAVER operates as designed, an industry standard Btu
heat loss calculation must be performed on the area to be heated
• This calculation considers all factors that contribute to heat loss such as:
• Area and volume of the space to be heated
• Geographical location and climate where the furnace will be located
• Structural characteristics of the building such as number of windows, exterior doors,
construction material, etc
ENERGYSAVER® Sizing
• The Air Conditioning Contractors’ Association (ACCA) has an
industry standard Btu calculation in their ―Manual J‖ publication
• A qualified and licensed installer should be familiar with this type
of calculation
• Visit http://www.acca.org/ for more information
• Rinnai also offers a basic DV sizing caluclator at
http://www.rinnai.us/heat_selector_2007.swf
• NOTE: Incorrectly sized applications can lead to the ENERGYSAVER short-
cycling or failing to bring the area to the desired set point temperature
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