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Monessen Solstice 33-Inch Ventless Gas Insert vs Napoleon Oakville X3 Gas Insert

The Napoleon Oakville X3 is the better insert for most shoppers: it has a wider feature set, including a thermostatic remote, Bluetooth control, NIGHT LIGHT and a split-flow burner, and it puts out slightly more heat. The Monessen Solstice 33 wins on viewing area and on installation flexibility, since it needs zero clearance to combustibles and fits a wider opening. Build quality is comparable between the two, and owners of both brands generally report solid reliability when the unit is installed correctly.

  • Choose the Monessen Solstice 33 if you want the largest flame view, a zero-clearance fit and a simple standing-pilot or IPI setup without smart controls.
  • Choose the Napoleon Oakville X3 if you want a remote, app control, a night light and independently adjustable front and rear burners.

Prices

  • Monessen Solstice 33-Inch Ventless Gas Insert: $1,576.72 at Designer Lighting & Fan (last seen Nov 9)
  • Napoleon Oakville X3 Gas Insert: $3,889.00 at North Country Fire (last seen Nov 11)
  • Difference: the Monessen Solstice 33-Inch Ventless Gas Insert is $2,312.28 cheaper than the Napoleon Oakville X3 Gas Insert at the latest prices (Nov 9 and Nov 11)
Monessen
Monessen Solstice 33-Inch Ventless Gas Fireplace Insert with Firebox, Logs & Blower

Monessen Solstice 33-Inch Ventless Gas Insert

Monessen Solstice 33-Inch Ventless Gas Fireplace Insert with Firebox, Logs & Blower

5(1 rating)
$1,576.72at Designer Lighting & FanChecked Nov 9
See all prices and details
Visit Designer Lighting & Fan
Pros
  • Largest viewing area in this pair at 445 sq in
  • Zero clearance to combustibles simplifies installation
  • Blower moves 135 CFM to spread heat
  • Battery backup runs up to 48 hours
  • Choice of liners, log sets and surrounds
Cons
  • Lower maximum heat output
  • No remote or app control
  • Single burner gives a simpler flame pattern
Napoleon
Napoleon Oakville X3 Gas Fireplace Insert GDIX3N-1

Napoleon Oakville X3 Gas Insert

Napoleon Oakville X3 Gas Fireplace Insert GDIX3N-1

5(1 rating)
$3,889.00at North Country FireChecked Nov 11
See all prices and details
Visit North Country Fire
Pros
  • Highest heat output at 30,000 BTU
  • Thermostatic remote and eFIRE Bluetooth included
  • NIGHT LIGHT glows even when the fire is off
  • Split-flow burner lets you run front and rear flames separately
  • Clean-face barrier maximizes the view
Cons
  • Smaller viewing area than the Monessen
  • Needs a tighter, deeper fireplace opening
  • Fewer ignition options

What separates them

Monessen Solstice 33-Inch Ventless Gas InsertNapoleon Oakville X3 Gas Insert
Maximum heat output28,000 BTU30,000 BTU
Viewing area445 sq in (28 x 15 in)340 sq in (22.63 x 15 in)
Clearance to combustibles0 inches on all sidesStandard clearances apply
ControlsManual variable, millivolt or IPI ignitionSIT Proflame II electronic ignition with thermostatic remote and eFIRE Bluetooth
Burner designSingle natural blaze burnerDual split-flow H-style burner with independent front and rear operation
Extra featuresStandard blower with 135 CFM airflowNIGHT LIGHT, directional baffles, clean-face safety barrier
Minimum fireplace openingFits a 33-inch-wide fireboxNeeds 28 5/8 in W x 20 15/16 in H x 14 3/8 in D
Power outage backupBattery backup runs up to 48 hoursBattery backup for ignition

Price history

  • Monessen Solstice 33-Inch Ventless Gas Insert: lowest $1,576.72 on Nov 9 at Designer Lighting & Fan.

Prices at every store

Monessen Solstice 33-Inch Ventless Gas Insert

  • Designer Lighting & FanNew

    In stock

    $1,576.72Free shippingChecked Nov 9
    Visit Designer Lighting & Fan
  • Tri State FireplacesNew

    In stock

    $1,659.17Free shippingChecked Nov 9
    Visit Tri State Fireplaces
  • ZoroNew

    Availability unknown

    $1,931.99Checked Nov 9
    Visit Zoro
  • ZoroNew

    Availability unknown

    $1,931.99Checked Nov 3
    Visit Zoro
All 15 stores and price history →

Napoleon Oakville X3 Gas Insert

  • North Country FireNew

    In stockReturn policy

    $3,889.00Checked Nov 11
    Visit North Country Fire
  • Spark SanctuaryNew

    In stockReturn policy

    $3,889.00Checked Nov 11
    Visit Spark Sanctuary
All 2 stores and price history →

Specs compared

SpecMonessen Solstice 33-Inch Ventless Gas InsertNapoleon Oakville X3 Gas Insert
Viewing area28" W x 15" H, 445 in.222.63 x 15 in (57.47 x 38.10 cm)
Weight110 lbs.107 lbs.
Maximum BTU input28,000 BTUs—
Blower airflow135 CFM—
Burner size18"—
Overall width33"—
Overall height24"—
Overall depth16"—
Thermal efficiencyUp to 99.9%—
Clearance to combustibles0° on all sides—
Gas line18" Flex line w/shut off 1/2" FPT—
BTU range natural gas19,000 - 28,000 (NAT)—
Show all 22 specsShow fewer specs
SpecMonessen Solstice 33-Inch Ventless Gas InsertNapoleon Oakville X3 Gas Insert
Heat Output Max—30,000 BTU
Fuel Type—Natural Gas
Framing Width—28.63 in (72.71 cm)
Framing Height—20.94 in (53.18 cm)
Framing Depth—18.31 in (46.51 cm)
Product Height—20.94
Product Width—28.63
Product Depth—18.31
Minimum Fireplace Opening—20 15/16”H X 28 5/8”W X 14 3/8”D

Questions and answers

Which insert heats a larger room better?
The Napoleon Oakville X3, at up to 30,000 BTU versus 28,000 for the Solstice. The gap is small, so either works for a typical living room.
Which has the bigger fire view?
The Monessen Solstice 33, with 445 sq in of viewing area against 340 sq in for the Oakville X3.
Which is easier to install in an old masonry fireplace?
The Solstice 33, because it needs zero clearance to combustibles and fits a wider opening. The Oakville X3 needs a tighter, deeper opening of about 28 5/8 in wide by 20 15/16 in high by 14 3/8 in deep.
Is the Napoleon worth stepping up to?
Yes if you want a remote, app control, a night light and separate front and rear burners. If you mainly want the biggest flame view, the Monessen is the better fit.
Do both work during a power outage?
Yes. Both have battery backup for ignition, and the Solstice 33 is rated for up to 48 hours on batteries.
Which lasts longer?
Both are built to similar standards, and lifespan depends mostly on installation and servicing. The Napoleon's electronic ignition and the Monessen's blower are the parts most likely to need attention first.

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Min. BTU/HR
—
18,540 BTU's