Real Fyre Mountain Crest Oak Vented Gas Logs

Real Fyre Mountain Crest Oak is a vented gas log set for a wood-burning fireplace that has a natural gas line. Peterson designed these logs for the G31 Three-Tiered burner, and they are sold only with it.

Who it's for

Right buyer. You have a wood-burning fireplace with a working chimney and a natural gas line, and you want the look of a real wood fire without hauling wood, from a match, a knob or a remote.

Wrong buyer. You want the fireplace to heat the room; vented logs send most of the heat up the chimney, and a vent-free set is the one for heat.

How it performs

The Mountain Crest Oak set is a vented gas fire in a wood-burning fireplace: the burner runs under and through the logs, the flames are tall and yellow and move like a wood fire's, and the embers glow under them. The look depends on the burner as much as the logs.

Good to know

• Vented logs are decorative: the damper is open and most of the heat goes up the chimney. For heat, the vent-free version of this style is the one.
• The logs never burn away, but they char and darken where the flame touches; that is part of the look.
• Gas use is real: a 24-inch burner on high draws about what a large furnace does. Low is for long evenings.

Dimensions

Measure the inside of the firebox, not the old logs and not the mantel opening. You need four numbers: width at the front, width at the back wall, depth from front to back, and height.

Your firebox must be at least as large as the row for the burner and size you want. Every size needs 17 inches of height. If you are within an inch of a minimum, order the next size down: a set that is too big disturbs the draft and overheats the valve.

Minimum firebox size with a control (manual pilot or any remote)

Electronic On/Off Remote needs more room for its battery and switch box. Add 2 inches to the front and back width on the G31.

Minimum firebox size with Match Light (no valve beside the burner)

The chimney must be at least 15 feet tall, and the firebox floor cannot have an ash lip or a sunken hearth deeper than 3/4 inch.

Clearances

A vented gas log set borrows the fireplace's own clearances: the mantel, hearth and side-wall rules of the wood-burning fireplace it goes into stay exactly as they were built and inspected. What the log set adds is the room the burner and the flames need inside the firebox, below, and three rules: the damper fixed fully open with the clamp supplied, glass doors open or removed whenever the burner runs, and nothing stored or draped within 3 feet of the front of the fireplace.

Documents

• G31 installation and owner's manual

Details

Warranty

Source: R.H. Peterson Real Fyre limited warranty, printed in the burner manual linked above. Register the set with Peterson after installation.

Heat

Choices and prices

Burner

The burner sits under the logs. It decides how the flame looks, how much gas the fire uses and which controls you can have.

G31 Three-Tiered

Three burners stepped from front to back, with a reflective panel behind the embers. The tallest, fullest fire Real Fyre makes, on less gas than a G45. ANSI certified with any control. It needs a firebox 16 inches deep.

Control

Match Light. There is no valve on the burner. You hold a long lighter at the burner and open the gas with your fireplace's wall or floor key, which also sets the flame height. Natural gas only. Some cities require a safety pilot instead, so check with your installer or building department.

Manual Safety Pilot. A small pilot flame stays lit, and you turn a knob at the burner to light the logs. If the pilot ever goes out, the valve shuts off the gas. No batteries and no wiring.

Variable Remote. Everything the On/Off Remote does, and the remote also raises and lowers the flame.

Electronic On/Off Remote. No standing pilot. Press On and the system sparks its own pilot, then lights the burner, so you are not burning gas on a pilot all season. It runs on batteries that come in the box and needs a slightly wider firebox (see the fit tables).

Electronic Variable Remote. Electronic ignition with flame height on the remote. Battery powered. G31 only.

"Yes" means the burner arrives with the valve assembled at the factory. "Kit" means the control ships as a separate Real Fyre kit for your installer to fit to the burner.

What arrives

• Log carton: the Mountain Crest Oak log set with its placement guide. Sets of 36 inch and larger ship in more than one carton.
• Burner carton: burner, grate, glowing embers, sand for the burner pan, gas connector kit and damper clamp. Burners with a control also include the valve and regulator, already assembled. Remote versions include the handheld remote, receiver and batteries. The G31 adds Bryte Coals, lava granules and lava coals.

Cartons can arrive on different days. Do not start the installation until everything is there.

Installation

A vented set goes into a wood-burning fireplace with a working chimney and a gas line, by a licensed gas installer, in about two hours.

• Gas: a dedicated 1/2-inch line to a shutoff at the fireplace; natural gas at 5 to 7 inches of water column, propane at 11 to 13. The connector runs through a plate in the firebox floor or wall.
• Damper: fixed fully open with the clamp in the box. This is the rule that makes a vented set safe; the fire's exhaust goes up the chimney like a wood fire's.
• Doors: open or removed whenever the burner runs.
• Burner: set on the grate in the center of the firebox, the logs placed by the diagram in the box, embers scattered on the burner, sand or vermiculite in the pan for natural gas, lava rock for propane.
• Controls: a match-light burner uses the fireplace's key valve; a safety-pilot burner has its own valve and knob; an electronic burner takes batteries in the control box or a 110-volt outlet inside the firebox for the plug-in version, and the remote pairs once.
• Codes: match-light burners are not allowed in some cities; the installer knows which. Most jurisdictions want the inspection.

Planning the install

• For wood-burning fireplaces only, masonry or factory-built, with a working chimney. Not for vent-free fireboxes, direct-vent or B-vent gas fireplaces, or stoves.
• You need a natural gas line into the firebox, 1/2 inch inside diameter or larger, with a shut-off valve outside the firebox.
• The included clamp fixes the damper so it can never close completely. The damper must be fully open whenever the fire is on, glass doors fully open, and a screen in place.
• Installation is by a qualified gas professional. Have the chimney swept first and the set inspected once a year.
• Do not burn wood in the fireplace once the gas logs are installed, and do not leave the fire on unattended or while anyone is sleeping.
• In Massachusetts the installer must be a licensed plumber or gas fitter, and the damper has to be removed or fixed fully open.
• Above 2,000 feet elevation, add a note to your order. Peterson builds high-altitude versions.