Orion Electric Fireplace Review: Orion Multi VS Orion Slim

Last reviewed: September 15, 2026

Orion Multi and Orion Slim share the same Heliovision flame technology, but they diverge on installation flexibility and heat output — the right choice depends on which of those two matters more for your space.

About the Orion line

The Orion series is made by Modern Flames, known for introducing modern linear electric fireplaces to North America. The line includes three models: the Orion Traditional Built-In Series, Orion Slim Series, and Orion Multi Series. This guide compares Slim and Multi specifically.

Quick comparison

Appearance

Orion Multi has an 18" viewing area versus 15" for Slim, along with a deeper ember bed that lets the logs sit further back for a more natural look. Multi is frameless, while Slim has a roughly 1-inch black bezel around the glass — worth considering if you want the fireplace to disappear into the wall rather than read as a framed feature.

Flame technology

Both models use Modern Flames' Heliovision flame technology, with 3 flame patterns, 6 flame colors, adjustable flame speed, and a crackling sound effect. On flame quality alone, the two are comparable — the differences that matter are in installation and heat output.

Heat output

Both use high-efficiency ceramic heaters, but Multi's wiring supports a 10,000 BTU heater versus Slim's 5,000 BTU, roughly double the output. If heating a larger space is a priority, Multi is the stronger fit — see our extra large electric fireplaces collection for other high-output options.

Installation and configuration

Orion Slim is a single-sided, linear built-in that also works wall-mounted — straightforward for most rooms. Orion Multi supports more configurations: built-in, wall-mounted, left-corner, right-corner, or bay-style, which makes it the better fit for a corner installation or a room where a standard flat wall isn't an option. If a multi-sided configuration interests you, also compare 3-sided electric fireplaces.

If this were my room

For a standard flat wall where heat output isn't the priority, Slim's frameless-adjacent simplicity and lower cost make sense. For a corner installation, a larger room, or where the extra heat output matters, Multi's flexibility and higher BTU rating are worth the difference.

Frequently asked questions

What's the main difference between Orion Slim and Orion Multi?

Installation flexibility and heat output. Multi supports corner and bay configurations and produces roughly double the heat (10,000 BTU vs. 5,000 BTU), while Slim is limited to single-sided installation.

Do Orion Slim and Orion Multi use the same flame technology?

Yes, both use Modern Flames' Heliovision technology with the same flame pattern and color options.

Which Orion model is frameless?

Orion Multi is frameless. Orion Slim has a roughly 1-inch black bezel around the glass.

Can Orion Multi be installed in a corner?

Yes. Orion Multi supports left-corner, right-corner, and bay configurations in addition to a standard front view, unlike Orion Slim.

What sizes are available for each series?

Orion Slim comes in 52", 60", 76", and 100". Orion Multi offers those same sizes plus a 120" option.

Related guides from Very Good Fireplaces

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Final thought

Both models deliver the same flame quality — the decision comes down to whether you need Multi's configuration flexibility and higher heat output, or Slim's simpler, lower-cost installation.