Monessen Aria 32" Vent-Free Gas Fireplace — Berkley Oak, Highland Oak or Beachcomber Log Sets
No chimney and no vent run — the Monessen Aria 32 is a 32-inch vent-free gas fireplace system rated 37,000 BTU/hr on natural gas or 36,000 on propane at up to 99.9% thermal efficiency, with a millivolt or electronic ignition by model. It frames into a 37-1/4" wide by 35" high by 15-1/2" deep rough opening behind a 32" x 21-3/4" viewing area, ships with its Natural Blaze burner, mesh screen and canopy, and takes the 24-inch log set you choose above. from $2,019.
Choose the Aria 32 if you want a traditional log fire in a room with no chimney and the narrower of the two Aria widths — a 37-1/4" rough opening against 41-1/4" for the Aria 36 — the burner rating, ignition choices and log-set styles are otherwise shared. Take the millivolt control if you want a fire that needs no wiring and keeps working through any outage; take the electronic control if you want push-button lighting from a wall switch or remote with a cold-climate pilot setting. Either way the mesh screen and canopy are in the carton, so the only thing to add before first lighting is the log set.
It is not right for a bedroom or a bathroom, or as the primary heat source for a home; it is listed as a supplemental zone heater. A vent-free heater also needs room air: at least 50 cubic feet of space per 1,000 BTU/hr of gas appliances in it, so a small or unusually tight room is the wrong place, and it puts moisture into the air, so very tight construction should add mechanical ventilation. It cannot be run with glass doors closed, and it is not the fireplace for a contemporary glass-media look — only the traditional log-burner models are sold. If you need a wider opening, the Aria 36 frames 41-1/4" wide.
Specifications
Frame a rough opening 37-1/4" wide by 35" high by 15-1/2" deep, or 43-3/4" along each wall with a 61-3/4" diagonal for a corner; the headers may rest on the firebox and the unit nails to the studs through its flanges. Keep 9" from the inside of the appliance to a combustible side wall and 42" from the top of the opening to the ceiling; the back may touch a combustible wall and the unit sits directly on a wood floor, never on carpet, vinyl or tile without a full-size base. Combustible mantel clearance depends on how far the mantel projects — see Figure 7 on page 10 of the installation manual (Figure 8 for mantel legs). You can also send us your mantel depth. We're here to help! Gas enters through the side access door to a factory 1/2" shutoff and 18" flex line; natural gas runs 5.0"-10.0" w.c. inlet and propane 11.0"-13.0" w.c. with an external regulator. Ratings apply to 2,000 ft; above that the input drops 4% per 1,000 ft.
How the Aria 32 compares to the Aria 36
Both Aria sizes share the 37,000 BTU/hr natural-gas (36,000 propane) Natural Blaze burner, the millivolt-or-electronic ignition choice, the 21-3/4" opening height, the 9" side and 42" ceiling clearances and the same log-set styles; they differ in width and depth. This 32 frames 37-1/4" wide by 15-1/2" deep behind a 32" opening and starts at from $2,019; the 36 frames 41-1/4" wide by 17-1/2" deep behind a 36" opening, from $2,229. The 36 is also the size that takes the eleven-log Stony Creek set.
Features
- Vent-free at up to 99.9% thermal efficiency — 37,000 BTU/hr on natural gas or 36,000 on propane, with no chimney, no vent run and the back against a combustible wall
- Millivolt models run with no electricity at all; the EcoLogic IPI electronic models add automatic lighting, a cold-climate standing-pilot switch and roughly 48 hours of battery backup
- The 24-inch Natural Blaze burner, cast-iron grate and rock wool are in the firebox — you choose the log set: Berkley Oak (fiber ceramic or refractory), Highland Oak or Beachcomber Burncrete
- Mesh screen front and canopy ship with it — no separate front or barrier to buy — and the ODS pilot shuts the gas off if room oxygen drops
- Frames into a 37-1/4" x 35" x 15-1/2" rough opening on a flat wall or a corner, directly on a wood floor, with 9" side and 42" ceiling clearances
- Listed to ANSI Z21.11.2 and CSA design certified; approved for manufactured homes where local codes allow
Answers to common questions
Does it need a chimney, a vent or an outside-air kit?
No — no model on this page needs a chimney or a vent run. The Aria 32 is an unvented room heater: it burns room air and installs as a zero-clearance unit against or into any wall a gas line reaches. What it does need is the room itself — at least 50 cubic feet of volume per 1,000 BTU/hr of gas appliances in the space, counting adjoining rooms open to it through doorless openings — plus a 1/2" gas line to the factory shutoff. The AK4 outside combustion air kit is an option where the room cannot provide that air on its own.
Where can it go, and how close can a mantel or shelf sit?
Any room except a bedroom or bathroom, out of drafts and traffic, with 9" from the inside of the appliance to a combustible side wall and 42" from the top of the opening to the ceiling; the back can touch a combustible wall and it sits directly on a wood floor (never on carpet, vinyl or tile without a full-size metal or wooden base, and vinyl needs 14" of floor protection in front). Combustible mantel clearance depends on how far the mantel projects — see Figure 7 on page 10 of the installation manual, and Figure 8 on the same page for mantel legs. Monessen's Barrington BWC400 and BWC500 cabinet mantels are built to comply. You can also send us your mantel depth. We're here to help!
What’s included, what’s required, and what’s optional?
-
Included in the box: 37,000 BTU/hr natural-gas or 36,000 BTU/hr propane input by model, with variable flame height; Millivolt piezo standing pilot or EcoLogic IPI electronic ignition, by model; Natural Blaze 24-inch burner with cast-iron grate, rear log bracket and rock wool; ODS safety pilot that shuts the gas off if room oxygen drops; Mesh screen front, black canopy with three screws, and two anchoring screws; Factory-fitted 18-inch stainless flex connector with a listed 1/2-inch T-handle manual shutoff; ANSI Z21.11.2 listing, CSA design certification, manufactured-home approval; HHT limited warranty — 20 years on the firebox, 10 years on the burner and refractory, 5 years on the vent-free burner and logs.
-
Required to complete the installation, purchased separately: Log Set - a 24-inch Natural Blaze log set (Berkley Oak (fiber ceramic or refractory), Highland Oak or Beachcomber Burncrete); the fireplace ships without logs, and a correctly placed approved log set is required before it is run; Gas Line - a 1/2-inch supply in new black iron or steel pipe to the factory shutoff, with an upstream manual shutoff, union tee, 1/8-inch NPT test point and sediment trap, run and purged by a qualified installer or licensed plumber; propane also needs an external regulator holding the tank supply at 13 inches w.c. or less; Electrical (electronic-ignition models only) - a 120 V, 60 Hz circuit to the factory junction box for the 6 V adapter, wired by a licensed electrician before the fireplace is framed; the millivolt models need no electricity.
-
Optional: Interior panels (Cinnamon or Colonial Red firebrick, Black Porcelain or Black Magic Glass), the BLOTMC 135 cfm thermostatic blower, RCB on/off or TSST thermostat remotes, the MVWS wall switch and TS thermostat sensor, the BLTK32C curved black trim kit, volcanic rock for the firebox floor and the AK4 outside combustion air kit — the fireplace operates fully without any of them.
Millivolt or electronic ignition — what is the difference, and do I need an electrician?
The millivolt models have a standing pilot you light once a season with the built-in piezo button, need no electricity at all, and adjust flame height at the LOW/HI knob; a wall switch, thermostat or RCB/TSST remote can be added on low-voltage wire. The electronic (EcoLogic IPI) models light the pilot and burner automatically from a wall switch or the hand-held remote, need a licensed electrician to wire a 120 V circuit to the factory junction box before the fireplace is framed, and add a cold-climate switch that keeps the pilot standing in a cold room; flame height from the remote needs a separate stepper-motor kit. Both are dedicated natural-gas or propane units — there is no field conversion.
What happens in a power outage?
It keeps burning whichever ignition you choose. A millivolt model never uses household power — its pilot generates the millivolts that run the valve, so nothing changes. An electronic model switches to its battery back-up, rated for roughly 48 hours of on/off operation (using high/low from a remote shortens that); the batteries are for outages, not everyday use.
What comes in the carton?
Every model ships with the fireplace and its Natural Blaze burner, cast-iron grate, rear log bracket and rock wool, the mesh screen front, the black canopy with its three screws, two anchoring screws, the manual, and an 18" stainless flex connector with a listed 1/2" T-handle shutoff already on the valve. The log set, interior panels, blower, remotes and trim kit are sold separately. Do not run it without the screen and canopy installed — both are mandatory.
Why does it smell the first time, and how often does it need service?
Every new unit burns off manufacturing oils for its first six hours on high — open windows and let the odour clear; anything after that will be slight and fade with use. Because it burns room air, Monessen wants an unvented heater cleaned before use and at least once a year by a professional: burner air-intake holes, burner ports and the ODS pilot must stay free of lint, and candles, incense or oil lamps burned nearby leave soot the heater cannot filter.
Does buying from The Torch Guys affect my Monessen warranty?
No. HHT's warranty covers Monessen products bought through an authorized dealer, and The Torch Guys is one — we register the appliance and, if you ever need to claim, we deal with the manufacturer on your behalf. The firebox and heat exchanger carry 20 years on parts and 3 on labour, the burner, logs and refractory 10 years, the vent-free burner and logs 5 years, and electrical components and liner panels 2 years; the warranty transfers with the home. Keep your invoice and the model number; we hold the rest on file.
