Wis. Admin. Code Department of Safety and Professional Services SPS 322.35 - Thermally isolated sunrooms
(1) The minimum opaque ceiling insulation R-value shall be R-24. The minimum opaque wall R-value shall be R-13.
(2) The maximum fenestration U-factor shall be 0.50 and the maximum skylight U-factor shall be 0.75.
(3) New walls, windows and doors separating a sunroom from conditioned space shall meet the building thermal envelope requirements.
(4) The temperature in the conditioned space shall be controlled as a separate zone or shall use separate heating equipment.
(5) Glazing in a thermally-isolated sunroom is not considered to be in the dwelling thermal envelope.
Notes
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