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Phius CORE Prescriptive 2021 Snapshot
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Input or select data in teal cells
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State
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City
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ASHRAE (169-2021) Climate Zone
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iCFA* (ft2)
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Number of Bedrooms*
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Number of Stories
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*per dwelling unit
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1
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General
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1.1.2
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iCFA divided by
Number of Bedrooms
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Maximum Limit
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ft2
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(Calculated Value
based on Inputs)
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ft2
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3
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Compactness
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3.1.1
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Envelope Area
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Maximum
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ft2
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(Maximum Envelope
to Floor Area Ratio)
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4
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Solar Protection
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4.1.1
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Whole Window SHGC
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Maximum
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4.4.1
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Projection Factor for
Fixed Overhangs
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Minimum
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5
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Thermal Enclosure
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5.1.1a
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Fenestration /
Openings
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Maximum Whole U-Value
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(BTU/h.ft2.°F)
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5.1.1b
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Walls & Overhang
Floors - Effective R-value
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Minimum Effective R-Value
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(ft2.°F.h/BTU)
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5.1.1c
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Roofs / Ceilings
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Minimum Effective R-Value
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(ft2.°F.h/BTU)
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5.1.1d
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Whole Slab Foundations, Below-Grade Walls,
Floors
of Conditioned Basements &
Crawl Spaces
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Minimum Effective R-Value
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(ft2.°F.h/BTU)
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5.1.1e
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Ceilings of Unconditioned Basements or
Crawl
Spaces & Pier and Beam Floors
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Minimum Effective R-Value
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(ft2.°F.h/BTU)
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6
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Moisture Risk Limitation
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6.2.1
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Fenestration Condensation Resistance
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Minimum
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7
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Mechanical Ventilation
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7.2.1
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Sensible Recovery Efficiency, Heating Mode
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Minimum
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7.2.2
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Total Recovery Efficiency, Cooling Mode
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Minimum
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7.2.5
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Total Length of Fresh Air Ducts to Outside
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Maximum
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ft
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8
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Mechanical Systems
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Select System Type
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8.2.1
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*NR = No Requirement
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For further details,
please see the Phius CORE Prescriptive 2021 Checklist.
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