Radiant Floor Heating (H06)
Radiant floor heating delivers luxurious warmth from below – particularly appealing in Utah’s cold winters for tile bathrooms and heated garages.
This BidScope guides you through radiant systems: electric resistance (heating cables or mats in thin-set, best for tile retrofits), hydronic (hot water through PEX tubing in concrete, most efficient for whole-house), and retrofit systems (low-profile for existing homes).
Learn electric radiant: heating cables or mats embedded in thin-set mortar under tile, powered by dedicated 240V circuit, programmable thermostat with floor sensor, typical wattage 12-15 watts per square foot, ideal for bathrooms (warm feet on cold mornings), kitchens, and small areas.
Understand hydronic radiant: PEX tubing embedded in concrete slab or attached under subfloor, heated water from boiler, tankless water heater, or heat pump, zoned control for different areas, most cost-effective for whole-house heating in new construction, can be retrofit in some applications.
Master installation considerations: floor height implications (concrete systems add 1.5-4 inches), insulation underneath critical for efficiency (R-10 minimum under slab, R-19+ for heated floors over unheated space), flooring compatibility (tile and stone ideal, engineered hardwood possible with temp limits, carpet reduces efficiency).
Navigate controls: programmable thermostats with floor and air sensors, anticipation settings for slow heat response, WiFi thermostats for remote control, zoning multiple areas independently.
Learn sizing and design: heat loss calculation determines BTU requirements, tubing or cable spacing affects heat output, edge insulation to prevent loss, manifold systems for hydronic zoning.
Understand operating costs: electric resistance $1-5 per square foot per month depending on use, hydronic more efficient especially with high-efficiency boilers.
Know applications: bathroom floors (luxury and comfort), kitchen floors, basement floors, garage floors (prevent ice melt tracked inside), whole-house primary or supplemental heat.
Calculate costs: electric mat $8-15 per square foot installed, hydronic tubing in concrete $10-20 per square foot, boiler system $8,000-15,000+ for whole-house.
This tool ensures your radiant floor heating is properly designed for comfort and efficiency.
What’s Included:
- Radiant floor heating types (electric, hydronic, retrofit)
- Electric radiant heating (cables or mats in thin-set)
- Heating cables (serpentine pattern under tile)
- Heating mats (pre-spaced cables on mesh backing)
- Electric system installation (embed in thin-set mortar)
- Dedicated 240V circuit for electric radiant
- Wattage requirements (12-15 watts per square foot typical)
- Programmable thermostats with floor sensor
- Applications for electric (bathrooms, kitchens, small areas)
- Hydronic radiant heating (PEX tubing, hot water circulation)
- PEX tubing in concrete slab (new construction)
- PEX tubing under subfloor (retrofit option)
- Heat source for hydronic (boiler, tankless water heater, heat pump)
- Manifold distribution and zoning
- Zoned control for different areas
- Whole-house hydronic heating efficiency
- Retrofit radiant systems
- Low-profile systems for existing floors
- Floor height implications
- Concrete systems add 1.5-4 inches
- Under-subfloor systems minimal height
- Insulation requirements (R-10 minimum under slab)
- Insulation under heated floors over unheated space (R-19+)
- Edge insulation to prevent heat loss
- Flooring compatibility with radiant heat
- Tile and stone ideal for radiant (high conductivity)
- Engineered hardwood possible (temp limits 80-85°F)
- Solid hardwood not recommended (cupping, gaps)
- Carpet reduces efficiency (insulating effect)
- Controls and thermostats
- Programmable with floor sensor and air sensor
- Anticipation settings for thermal mass delay
- WiFi smart thermostats for remote control
- Sizing and heat loss calculations
- BTU requirements by room and climate
- Tubing or cable spacing affects output
- Water temperature for hydronic (typically 100-120°F)
- Operating costs
- Electric resistance $1-5 per sq ft per month
- Hydronic more efficient (depends on heat source)
- High-efficiency boilers reduce costs
- Specific applications
- Bathroom floors (warm feet luxury)
- Kitchen floors
- Basement slab heating
- Garage floor heating (prevent ice melt tracking)
- Whole-house primary or supplemental heating
- Cost factors ($8-15/sf electric mat, $10-20/sf hydronic in concrete, $8,000-15,000+ boiler system)
- Installation complexity
- Finding qualified radiant contractors
- Warranties on systems and installation
