How to measure (60 seconds)
- Choose install type: recessed (flush) or wall-mount (bracket).
- Opening size: for recessed installs, measure the finished opening width × height and verify minimum depth.
- Depth available: confirm at least 4" minimum depth for recessed installs.
- Power: plan a dedicated 120V circuit (15A or higher breaker recommended/required per manual).
- TV / mantel above: keep clearance above the glass opening (see installation notes below).
Clearance note
Keep furniture, drapes, bedding materials and all combustible materials at least 3 feet from the front of the fireplace. Follow the manufacturer’s minimum clearances and local electrical code.
Fit requirements table (hard constraints)
“Recessed framing / cutout” values below are the minimum finished opening dimensions for a recessed (flush) install. All models are 120V and provide up to 5,000 BTU supplemental heat.
| Size | Model (SKU) | Viewing area (W×H) | Firebox (W×H×D) | Recessed framing / cutout (W×H×D) | Heat (standard) | Heat (optional) | Power + breaker | Link |
|---|---|---|---|---|---|---|---|---|
| 50" | SPS-50B | 46" W × 12" H | 49 3/4" W × 17" H × 4 3/4" D | 48 7/8" W × 16 1/4" H × 4" D (min.) | 120V 60Hz, 1,465W, 5,000 BTU (max) | — | Dedicated 120V circuit recommended. Use a dedicated 15A (or higher) breaker. Plug directly into a grounded outlet; no extension cords. |
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| 60" | SPS-60B | 55 13/16" W × 12" H | 59 3/4" W × 17" H × 4 3/4" D | 58 7/8" W × 16 1/4" H × 4" D (min.) | 120V 60Hz, 1,465W, 5,000 BTU (max) | — | Dedicated 120V circuit recommended. Use a dedicated 15A (or higher) breaker. Plug directly into a grounded outlet; no extension cords. |
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| 74" | SPS-74B | 69 3/4" W × 12" H | 73 3/4" W × 17" H × 4 3/4" D | 72 7/8" W × 16 1/4" H × 4" D (min.) | 120V 60Hz, 1,465W, 5,000 BTU (max) | — | Dedicated 120V circuit recommended. Use a dedicated 15A (or higher) breaker. Plug directly into a grounded outlet; no extension cords. |
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| 100" | SPS-100B | 95 7/8" W × 12" H | 99 3/4" W × 17" H × 4 3/4" D | 98 7/8" W × 16 1/4" H × 4" D (min.) | 120V 60Hz, 1,465W, 5,000 BTU (max) | — | Dedicated 120V circuit recommended. Use a dedicated 15A (or higher) breaker. Plug directly into a grounded outlet; no extension cords. |
View on product page |
Installation type selector
Spectrum Slimline supports recessed (flush) or wall-mount installation. Use the correct constraints below.
Recessed (flush): finished opening + depth
Build the finished opening to the exact “Recessed framing / cutout” dimensions in the fit table (minimum 4" depth). Ensure the unit can be serviced/removed per manual guidance.
Clearances (measured from the glass front): Bottom 0", Sides 0", Back 0". Maintain 11.8" (300mm) minimum clearance from the top of the glass to a mantel or ceiling (per manual). Keep combustibles at least 36" from the front.
Wall-mount: bracket + stud fastening
Mount the included bracket level and fasten into wall studs where possible. The manual recommends a dedicated 15A (or higher) breaker and prohibits extension cords/power strips.
Wall-mount installs use the supplied bracket and (where applicable) side skirt panels. Maintain the same top clearance guidance for TV/mantel planning: 11.8" (300mm) from the top of the glass to mantel/ceiling (per manual), and follow your TV manufacturer’s heat/clearance requirements.
Size-by-size guidance (recommendations)
Why choose Spectrum Slimline? Ultra-slim 4" recessed opening, Hybrid-FX™ flames, true flush-mount look, and flexible wall-mount or recessed installation on standard 120V power.
50" model
SPS-50B
Best for: Small apartments, bedrooms, or mounting under 43"–50" televisions.
Why: This is the most popular entry-level linear fireplace. At just under 50 inches wide, it provides a sleek, modern look without requiring a large dedicated wall. Because it only requires 4 inches of depth, it can be recessed into a standard 2x4 partition wall without any special framing modifications.
Viewing area: 46" W × 12" H
Recessed cutout: 48 7/8" W × 16 1/4" H × 4" D (min.)
Firebox: 49 3/4" W × 17" H × 4 3/4" D
60" model
SPS-60B
Best for: Standard living rooms and balancing with 55"–65" televisions.
Why: The 60-inch model is the "sweet spot" for most residential feature walls. It stretches wide enough to create a high-end look but remains lightweight enough for easy wall-mounting. It features the same high-intensity Hybrid-FX™ flame technology as the larger models, ensuring the fire looks vibrant even in bright rooms.
Viewing area: 55 13/16" W × 12" H
Recessed cutout: 58 7/8" W × 16 1/4" H × 4" D (min.)
Firebox: 59 3/4" W × 17" H × 4 3/4" D
74" model
SPS-74B
Best for: Large master suites, basement media rooms, and dining areas.
Why: At over 6 feet wide, the 74-inch model is designed to fill horizontal space and create a "luxury" feel. It is a favorite for designers who want the look of a high-end custom fireplace but are working with a standard 120V electrical outlet and limited wall depth.
Viewing area: 69 3/4" W × 12" H
Recessed cutout: 72 7/8" W × 16 1/4" H × 4" D (min.)
Firebox: 73 3/4" W × 17" H × 4 3/4" D
100" model
SPS-100B
Best for: Grand great rooms, commercial lobbies, and expansive home theaters.
Why: This is a true statement piece. Stretching nearly 8.5 feet across, the 100-inch model is built to anchor massive walls. Despite its impressive scale, it maintains the ultra-slim 4-inch profile, allowing you to achieve a "flush" built-in look in locations where deeper fireplaces would be impossible to install.
Viewing area: 95 7/8" W × 12" H
Recessed cutout: 98 7/8" W × 16 1/4" H × 4" D (min.)
Firebox: 99 3/4" W × 17" H × 4 3/4" D
View product page and availability
Check current stock, select a size, and see current pricing on the main product page.
Safety and electrical notes are summarized from the Modern Flames Spectrum Slimline owner’s manual and catalog literature. Always follow the manufacturer installation instructions and local electrical code. Use a qualified electrician for any hardwire installation.