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WCxty'f <br />Louisville <br />coLouano sirrcE 10�8 Insulation all Heated Structures (including core /shell) <br />R-49 Ceilings <br />R-21 Exterior Walls <br />co <br />101 <br />o R-19 Basement Walls <br />o R-38 Under Floors (with unconditioned space below) <br />o R-15 on side of slab/ R-10 Under Heated Concrete Slabs <br />o R-8 Ducts outside thermo envelope <br />o R-3 Hot Water Lines Insulated <br />• Windows and Glazing U Factors <br />o U- .30 on Windows <br />o U- .55 on Skylights <br />• Electrical <br />o Structures shall be built to be Solar Ready <br />o Timers on Bathroom Exhaust Residential <br />o Commercial Buildings Need Light occupant sensors <br />o Recessed luminaires installed in the building thermal envelope shall <br />be sealed to limit air leakage <br />0 90% or more of all light fixtures shall contain high -efficiency lamps <br />o In Commercial Buildings Rooms with Exterior glazing shall have <br />daylight responsive controls <br />• Mechanical <br />o New Residential 90% Plus Furnaces 90% Plus Boilers <br />o All Commercial Structures a minimum of 80% Plus RTU <br />o A/C Units-14 SEER <br />o On Commercial Non -Residential Buildings Occupancy sensors are <br />required on Thermostatic set back controls (Brings building to lower <br />temp when not occupied) <br />o Manual J and D will be required on new residential and additions <br />greater than 500 Sq. Ft. <br />• Natural Lighting <br />o Commercial Buildings need 3% of Roof to be skylights unless used <br />for solar panels <br />o Commercial glazing shall not be less than 8% of the total floor area <br />• Air Changes <br />o All New Residential shall be tested to verify air leakage rate does not <br />exceed 3 air changes an hour and shall have whole house <br />mechanical ventilation with section M1505.4. <br />Snow Load: <br />21 'age <br />30 I bs/sf <br />DESIGN CRITERIA <br />