Modern Flames  |  SKU: RS-4229

Modern Flames Redstone 42 Inch Built-In Electric Fireplace Firebox Insert

Regular price $1,699.00

Images & size shown are for reference only: colors may vary by screen, lighting, & natural material variation. See description for dimensions & finish options or call us to request a sample if an exact match is needed.

Most items ship within 1 business day. Manufacturer-direct items may take up to 2 weeks. Call us before ordering if needed immediately. 718-326-4328

Choose with help from our Maspeth showroom. Read customer reviews on Google.

Pickup available at Maspeth, NY Showroom

Usually ready in 2-4 days

Northeast shipping only: ME, VT, NY, NH, MA, CT, PA, NJ, MD, DE and RI. For any other state, call 718-326-4328 for a shipping quote before ordering. Product and local-service restrictions apply. Shipping details.

400+ five-star Google reviews
  • Northeast shipping. Eligible orders over $999 ship free within our 11-state area; other eligible orders have a flat rate at checkout. Product exclusions apply. Shipping details.
  • Factory-authorized Modern Flames dealer. You keep the full manufacturer warranty.
  • 30-day returns, no restocking fee.
  • Professional installation available across NYC, Long Island, Westchester, northern NJ and Greenwich/Stamford, CT.
Visit our Maspeth, Queens showroom
58-30 Maspeth Ave
Maspeth, NY 11378
Monday–Friday
9:00 AM–5:00 PM
Saturday
10:00 AM–3:00 PM
Sunday
Closed

Call ahead to confirm the model you want to see and pickup readiness.

Shipping & Delivery Area

  • Online shipping is limited to Maine, Vermont, New York, New Hampshire, Massachusetts, Connecticut, Pennsylvania, New Jersey, Maryland, Delaware and Rhode Island.
  • Eligible orders over $999 receive free standard shipping; eligible orders of $999 or less have a flat rate shown at checkout.
  • Our own trucks deliver eligible local orders up to 120 miles. e-NRG fuel, white-glove delivery and assembly have separate eligibility, distance limits and charges.
  • For other states, or when no delivery option appears, call 718-326-4328 for a quote before ordering.
  • Read the shipping policy for details.

Assembly & Installation

Our company installs in the following areas: Manhattan, Queens, Brooklyn, Nassau, Suffolk, Staten Island, Bronx, & Westchester NY. Hudson, Union, Essex, & Bergen NJ. Greenwich & Stamford, CT. Check out our portfolio of projects we built!

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Warranty

Manufacturer's warranty their products only if they are purchased from an authorized retailer like us. If an issue occurs and the item was purchased from a 3rd party website i.e. Amazon, your claim may be denied. What this means for you as a customer? As a factory authorized & trained dealer for every brand on our website, you will maintain full manufacturer's warranty. Please click on the manufacturer's manual in the description for full warranty coverage information.

Returns

  • No-Restock Fees
  • 30-Day Return Policy
  • The NYC Fireplaces Team wants you to love what it is that you've ordered! If for some reason you have an issue with your product, we offer a '30-Day Return Policy'.
  • We allow returns on all new, unused, unassembled, and "resalable" items in their original packaging within 30 days of the delivery date for a refund (minus the original shipping costs, and the shipping costs you incur shipping the product back). Naturally, if your return is because of our error, you are not responsible for any shipping costs.

Description

Explore other Redstone insert sizes: 26 inch | 30 inch | 36 inch | 42 inch (this size)

Overall Dimensions: 39-3/4 in. W x 27 in. H x 9-7/8 in. D with 5/8 in. trim; finished opening 38-3/4 x 26-3/4 x 10 in.

The Modern Flames Redstone 42 (RS-4229) is a built-in electric firebox for a new framed wall or an existing fireplace opening, with Modern Flames' Hybrid-FX flame, a log set and acrylic crystal ember bed. It plugs into a standard 120V outlet and heats with up to 1,465 watts, about 5,000 BTU.

It suits a traditional room where you want the look of a wood fireplace without venting or gas, with independently controlled flame color, up lighting and down lighting and a thermostat-controlled heater.

Features

  • Hybrid-FX flame technology (per listing)
  • 10 flame colors with independently controlled up and down lighting (per listing)
  • Log set with acrylic crystal ember bed
  • Two heat settings, 733 W and 1,465 W, with thermostat; heater can be switched off
  • 120V plug-in, 1,465 W, about 5,000 BTU
  • For a framed wall or an existing fireplace opening
  • Finish trim included (per listing)
  • Remote that can be installed below a TV (per listing)

Key Specifications

Model RS-4229
Type Built-in electric fireplace or insert
Power 120V 60Hz, 1,465 W (5,000 BTU)
Circuit Dedicated 15 A (or higher) breaker
Media Log set with acrylic ember bed
Controls Touch controls and remote, thermostat, timer 30 min to 8 hours
UPC 696447348302

Dimensions and Opening

Overall with 5/8 in. trim 39-3/4 in. W x 27 in. H x 9-7/8 in. D
Overall with 1-5/8 in. trim 41-3/4 in. W x 29 in. H
Firebox body 38-1/2 in. W x 26-5/8 in. H x 9-1/4 in. D
Finished opening 38-3/4 in. W x 26-3/4 in. H x 10 in. D
Power cord 70-7/8 in.

What Is Included and What You Will Need

  • Included: RS-4229 firebox with log set, ember media, trim and remote, per the owner's manual and listing
  • Required: a dedicated 110 to 120V, 15 A grounded outlet or hardwired circuit
  • Required: a finished opening of 38-3/4 x 26-3/4 x 10 in. in a framed wall, or an existing fireplace opening
  • Note: Modern Flames lists its optional trim kits for the Redstone 26, 30 and 36 only; no optional trim kit is available for the RS-4229

Installation Notes

Build the finished opening at 38-3/4 in. wide, 26-3/4 in. high and 10 in. deep, provide a dedicated 15 A (or higher) circuit, then slide the fireplace in, level it on its feet and secure it with the four screws, per the Redstone owner's manual. Do not plug other appliances into the same circuit. Electric fireplaces need no venting or gas, which makes them a practical choice for New York City apartments. Book a design consultation to plan the wall, power and finish.

Documentation

Frequently Asked Questions

Can it go in my existing fireplace?

Yes. Modern Flames rates the Redstone for a new framed wall or as an insert in an existing fireplace opening; it needs a 38-3/4 x 26-3/4 x 10 in. opening.

How much heat does it make?

Up to 1,465 watts, about 5,000 BTU, on a 120V circuit.

Does it need a dedicated circuit?

Yes. The manual calls for a dedicated 15 A or higher breaker.

Can I run the flame without heat?

Yes. Heater setting H0 turns the heater and blower off; the heater only runs when the flame is on.

Related reading: Electric Fireplace Buying Guide and Best Fireplace for an NYC Apartment.

Warranty

Modern Flames limited warranty (2022-2023 policy): 5 years from date of purchase when the owner registers the product at modernflames.com, otherwise the standard 2-year warranty; integrated screens 1 year; labor credit 1 year from purchase. Coverage requires purchase from an authorized Modern Flames dealer, is not transferable, and Modern Flames must be contacted first to troubleshoot.

From our project portfolio

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Think beyond the appliance

Build your complete setup

Choose the level of help you need. We’ll confirm the exact model, compatible parts and a clear quote before you commit.

01

The appliance

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02

The complete setup

Ask us to pair the appliance with the correct trim, venting, cover, cart or other model-specific accessories.

03

The installed project

For projects within our service area, ask for a quote covering product selection, compatible components and installation.

These are planning options, not pre-priced bundles. Accessories, delivery and installation are separate unless your written quote includes them.

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Make sure this model fits your project

A few details now can help you avoid ordering the wrong size, fuel type or installation components.

  1. 1. Confirm fit

    Check finished dimensions, opening or cutout measurements and the manufacturer’s required clearances.

  2. 2. Match the fuel and connections

    Confirm the exact model’s fuel type, electrical requirements and any venting or ventilation requirements.

  3. 3. Complete the setup

    Check what is included. Ask us to quote compatible accessories, delivery and installation separately where needed.

See the work. Hear from customers.

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Questions to settle before you order

How do I know which size and configuration to order?

Have your dimensions, photos, fuel or power details and preferred model ready. Contact our showroom before ordering if fit or compatibility is unclear. Follow the manufacturer’s installation instructions.

Does the price include everything I need?

Check the product description and selected configuration for included parts. Venting, trim, surrounds, covers, carts, fuel and installation may be separate. Ask for a complete quote before purchasing.

Can you deliver and install it?

Delivery and installation depend on your address and the product. Review our shipping policy and call for an installation quote. Confirm availability and timing before booking work. Read shipping details. Read return terms.

Product, accessory and installation prices are separate unless the offer explicitly includes them. Compatibility must be confirmed for the exact model.