Napoleon Ascent 46 Direct Vent Gas Fireplace, Millivolt
This is the millivolt-ignition version of the Napoleon Ascent 46, the widest of the Ascent fireplaces, for a homeowner who wants a standing pilot and a valve that runs without a control board. The fireplace itself is the same 46 inch traditional firebox: the PHAZER log set, glowing embers, and charcoal are in the carton and the standard safety barrier is on the unit, so the fire is complete as delivered.
The finish is up to you. Brick panels in Old Town Red or Westminster, black porcelain reflective panels, a Heritage or Zen decorative front, and a beveled finishing trim are all optional. It vents off the top or the back with 4 inch exhaust and 7 inch intake pipe and ships set up as a rear vent. The blower and a remote or wall thermostat are optional. It's built in Ontario, Canada, and sold as a natural gas unit; a propane conversion kit is available.
What Makes the Ascent 46 Millivolt Different
- No electricity needed for the fire. The gas millivolt system runs from its standing pilot, so the fire does not depend on household power. The optional blower does.
- Log set and barrier included. The PHAZER log set, embers, and the standard safety barrier come with it, so there is no required add-on to finish the firebox.
- Forty-six inches of fire. The largest Ascent viewing area, in the same traditional firebox as the 36 and 42.
- Top or rear vent. It ships as a rear vent and converts to top vent with the supplied collars.
This listing is the current Napoleon Ascent 46 with millivolt ignition, model B46NTR for natural gas. The log set and safety barrier are included; the blower, remote or thermostat, panels, fronts, trim, and media kits are optional and sold separately, and a propane conversion kit is available.
Key Specifications
- Model: B46NTR (natural gas, millivolt ignition; a propane conversion kit is available)
- Input (max): 22,000 BTU/hr
- Ignition: Millivolt (standing pilot); no external electricity required for the gas system
- Venting: Direct vent, top or rear, 4 in exhaust / 7 in intake (ships as rear vent)
- Viewing area: 41.69 in W x 23.69 in H
- Width x depth: 46 in W x 18.31 in D
- Included: PHAZER log set with glowing embers and charcoal, standard safety barrier, glass door, top and rear vent collars, front hood
- Required, sold separately: None beyond the venting the store supplies with the installation
- Optional: Blower, remote control or wall thermostat, brick or black porcelain reflective panels, Heritage or Zen decorative front, beveled finishing trim, media kits with support bracket
- Made in: Ontario, Canada
Input figures are Napoleon's ratings. How warm the room feels depends on the space, your home's layout, the installation, and how you run the fire.
Ownership & Maintenance
The safety barrier comes with the fireplace and must be installed. The millivolt valve runs the fire without household power; if you add the blower, it needs power at the fireplace. We offer ongoing service for our customers.
We'll help you pick panels and a front or trim, then plan the venting, framing, and installation. See more gas fireplaces or stop by our Auburn, Brunswick, and Yarmouth showrooms.