Stelpro USA

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All Systems Operational

Since Tuesday, 02/23/2021 04:00
Eastern Time Zone

  • logo Flextherm

Mini Patio Door Heater

Strength and safety combined


The SPDH mini baseboard series has made a name for itself in the heating sector. It’s designed to be installed under a patio door and is trample resistant. Despite its small size, its rounded front rim makes it surprisingly sturdy.

Product images

  • SPDH | Ambiance
  • SPDH | Ambiance
  • SPDH | Angle




  • Compact and sturdy (3" x 3")Perfect below patio doors and large windows
  • Low density150 W per linear foot
  • Faux sections, pedestals and finished backs availableCustomizable installation

Ideal for

  • Kitchen
  • Office
  • Solarium



  • Epoxy-polyester powdercoat


  • 3 in. x 3 in. compact profile
  • Solid, 18-gauge steel cabinet and front that may be used as a step
  • Thermal protection with automatic reset
  • Full-length wireway
  • Pencil-proof openings of less than 1/4 in. prevent foreign objects from entering the unit


  • Single tubular, stainless steel sheathed element with boxed aluminum fins for improved heat dissipation; the element is securely fastened at its centre, floating in nylon sleeves at each end, eliminating expansion and contraction noises


  • Wall thermostat (not included) – the use of an electronic thermostat is strongly recommended
  • Built-in thermostat accessible without removing front grille, installed in the left junction box only (optional)
  • Low voltage relay kit installed in the left junction box only (optional)


  • Surface mounted
  • Wall or floor mounted with or without pedestal kit (optional)
  • Wiring compartment at both ends of unit
  • Blank sections (custom lengths) and accessories are available for a continuous look (optional)


  • Three years