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Modern Flames Spectrum Slimline Series

The Modern Flames Spectrum Slimline delivers a clean, contemporary linear look in an ultra-slim 4" deep firebox that’s easy to integrate as a built-in clean-face or wall-mount installation. Available in four popular sizes — 50", 60", 74" and 100" — Spectrum Slimline adds vivid flame ambiance and convenient supplemental heat to media walls, living rooms, bedrooms and more.

Why Choose Spectrum Slimline

  • Ultra-Slim Profile: Just 4" deep for tight wall builds, niches and retrofits. 
  • Flexible Installation: Built-in clean-face or wall-mount configurations to match your project. 
  • Comfort Heat: 5,000 BTU variable heater with thermostat for efficient zone heating. 
  • Complete Media Included: driftwood logs and clear acrylic stone for traditional or modern looks.
  • Size Options: 50", 60", 74" and 100" widths fit small to extra-wide feature walls.

Spectrum Slimline At-a-Glance

Model Depth Install Types Heat Media Included
Spectrum Slimline 50" 4" Built-in clean-face or wall-mount Up to 5,000 BTU (thermostat) Driftwood logs + clear acrylic stone
Spectrum Slimline 60" 4" Built-in clean-face or wall-mount Up to 5,000 BTU (thermostat) Driftwood logs + clear acrylic stone
Spectrum Slimline 74" 4" Built-in clean-face or wall-mount Up to 5,000 BTU (thermostat) Driftwood logs + clear acrylic stone
Spectrum Slimline 100" 4" Built-in clean-face or wall-mount Up to 5,000 BTU (thermostat) Driftwood logs + clear acrylic stone

Shop All Modern Flames

Shop Modern Flames Series

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Frequently Asked Questions

  • The Modern Flames Spectrum Slimline is available in four widths: 50", 60", 74", and 100". This range makes it suitable for everything from a bedroom accent wall to a large living room or commercial space feature wall.

  • No special venting or chimney is required — the Spectrum Slimline is an electric fireplace with no combustion, making installation much simpler than gas or wood alternatives. It can be plugged into a standard 120V outlet or hardwired, though a recessed clean-face installation will require a qualified electrician for hardwiring.

  • The Spectrum Slimline is less than 5" deep, and it is specifically engineered to recess fully into a standard 2" x 4" or 2" x 6" stud wall. This slim profile means hardwood flooring or tile can be finished right up to the fireplace opening for a seamless, built-in look.

  • Yes — the flame display operates completely independently from the heater, so you can enjoy the visual ambiance of the fire without generating any heat. This makes it a great year-round feature, even during warmer months when heating isn't needed.

  • At its highest setting, the Spectrum Slimline produces 5,000 BTUs of heat, which is enough to heat a room up to approximately 400–450 square feet. It also includes a thermostat that lets you set a target temperature between 68°F and 88°F, along with a programmable timer of up to 8 hours.