Superior VRT2500: a vent-free firebox with a 24 inch tall opening, ready for the gas logs you choose
The Superior VRT2500 is a vent-free gas firebox. A firebox is the steel shell that holds the fire. Your builder frames a wall around it and finishes it in stone, tile, or brick. Vent-free means it needs no chimney or vent pipe at all, so it can go on almost any inside wall, which makes it a favorite for remodels. It is available in widths of 36 or 42 inches, with an opening 24 inches tall and the full width of the box. Pick the size on the page. Stacked brick panels line the sides and back. The face is clean, with no louvers.
It is the firebox only. You add a vent-free gas log set, sold separately, and the logs set the heat. Compatible sets include Superior’s Rugged Stack, Boulder Mountain, and Crescent Hill, among others. A heat hood and mesh screens come with it. On the page you can add arched screen doors in textured iron, a blower, and an outside air kit. Check your local code first, since some areas restrict vent-free fireplaces. Want a taller opening set low to the floor? See the Superior VRT3200 vent-free firebox. The Superior VRT2500 ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Specifications
SKU: VRT2536WS | VRT2542WS
| Attribute |
VRT2536 |
VRT2542 |
| Model |
VRT2536 |
VRT2542 |
| Product Type |
Vent-Free Gas Fireplace |
Vent-Free Gas Fireplace |
| Framing Width |
42-1/4″ |
48-1/4″ |
| Framing Height |
40-1/4″ |
40-1/4″ |
| Framing Depth |
20-1/2″ |
20-1/2″ |
| BTU |
Based on vent-free logs installed |
Based on vent-free logs installed |
| Design Style |
Firebox Only |
Firebox Only |
| View Style |
Front-View |
Front-View |
| Warranty |
20 Year Limited Warranty |
20 Year Limited Warranty |
SPEC, VRT2500 36/42 WS VF Fireboxes
FAQ
Does the VRT2500 include a burner and logs?
No. It is a universal vent-free firebox only, with the heat deflection hood and mesh fire screens included. You pair it with any listed ANSI Z21.11.2 vent-free log set; the Smart Sheet names Superior’s Rugged Stack, Golden Oak, Wild Timber, Boulder Mountain, Crescent Hill, Crescent Hill HD, Granite Ridge and Silverstone Timber sets. Browse them in our ventless gas logs category and size to the 24 in tall opening.
Does a vent-free firebox need a chimney or vent pipe?
No venting or chimney is required, which is what makes it inexpensive to build in. It is a zero-clearance firebox, so framing can touch the sides, back and top except where the standoff spacers sit. The trade-off is that the room must supply combustion and ventilation air per the manual’s formula, and some jurisdictions restrict vent-free appliances (Massachusetts, for example, bars them from bedrooms and bathrooms), so check local code first.
Which sizes are available and what are the framing dimensions?
Two sizes on the Size selector: the VRT2536 with a 36 in wide opening and the VRT2542 with a 42 in opening, both 24 in tall and full width. Framing is 42-1/4 in wide by 40-1/4 in high by 20-1/2 in deep for the 36 and 48-1/4 by 40-1/4 by 20-1/2 for the 42. Interior firebox width is 35 in and 41 in, which is the number to match against a log set’s minimum front width.
How much heat will it give off?
That depends on the log set you install; the firebox itself has no burner. The manual caps it at an unvented room heater not exceeding 40,000 BTU per hour, and it includes a room-size calculation (space volume multiplied by 20 gives the maximum BTU the room can support, with other gas appliances in that space added in). Your installer should run that check before choosing the log set’s input rating.
Can I add doors, a blower or an outside air kit?
Yes, all three are on the selectors. The Screen Door row offers precision-cut twin-pane arched screen doors in a textured iron finish, sized to your opening. The Blower row lists a standard single-speed kit and a variable-speed kit with wall switch, and the Outside Air row adds a ducted kit that brings in outdoor air to improve burner performance and reduce condensation in the room.
Why does a new vent-free firebox smell during the first fires?
The manual describes a burn-in period: the paint cures and manufacturing lubricants burn off during the first few uses, producing an odor and light haze that can set off a smoke detector. Open windows and ventilate the house for those first burns, which may take a few hours or a few days of use, and do not run the optional blower until the burn-in is finished.