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STEP Handbook™ 2008 Edition 0. HOME PAGE      0.1. Contents      0.2. Company Background      0.3. FAQ 1. RADIANT FLOOR SYSTEMS      1.1. Radiant Heat      1 2. Radiant Options      1.3. Efficiency 2. PRODUCT INFORMATION      2.1. STEP Warmfloor      2.2. Self-regulating Technology      2.3. Health and Safety      2.4. Approvals      2.5. Terms and Conditions of Sale 3. PARTS & ACCESSORIES      3.0. System Components      3.1. Heating Element Datasheet      3.2. Terminal Board Datasheet      3.3. Transformers          3.3.1. STEP Transformers Datasheet      3.4. Controls          3.4.1. DIGI-LUX Datasheet          3.4.2. DIGI-LUX Instruction Manual          3.4.3. MICROREG Datasheet          3.4.4. MICROREG Instruction Manual 4. PRODUCTS      4.0. STEP Element Type – 24V      4.1. STEP Residential – 24W          4.1.1. Residential Kits      4.2. STEP Commercial – 29W      4.3. STEP Stairs – 22W      4.4. STEP RV – 32W      4.5. STEP Sunroom – 44W      4.6. STEP Snowmelt – 70W      4.7. STEP Stair Deicing – 70W      4.8. STEP Roof Deicing – 32W      4.9. STEP Gutter Deicing – 12 V – 17W

5. DESIGN & CALCULATIONS      5.1. Design Guidelines      5.2. Heating Calculations      5.3. Wire Size          5.3.1. Wire Lengths      5.4. Electric Resistance Chart      5.5. PTC Performance      5.6. Conversion Tables 6. INSULATION      6.1. Insulation Properties          6.1.1. Insulation Under Radiant      6.2. R-Values for Building Materials      6.3. Insulation Products 7. EFFICIENCY      7.1. Heat Loss      7.2. Energy Savings          7.2.1. Test House      7.3. Operating Cost Comparison      7.4. Heating Needs          7.4.1. United States          7.4.2. International      7.5. Solar Panel Integration 8. INSTALLATION      8.1. Floor Prep & Electrical      8.2. Wiring Diagram      8.3. Fail Safe Wiring      8.4. Troubleshooting      8.5. Check List 9. FLOORING OPTIONS      9.1. Concrete Slab      9.2. Commercial      9.3. Off Peak      9.4. Wet Areas      9.5. Tile      9.6. Resilient      9.7. Carpet and Cushion      9.8. Wood      9.9. Between Joists      9.10. Sunroom 10. EXTERIOR APPLICATIONS      10.0. Snow Melting Systems      10.1. Design Guidelines          10.1.1. Snowmelt Element          10.1.2. Stair Treads      10.2. Connections      10.3. Snowmelt Controls