Monessen Solstice/VFI 33 Vent-Free Gas Insert
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Give an existing fireplace a new flame
Monessen Solstice/VFI 33 Vent-Free Gas InsertThe Monessen Solstice 33 is a vent-free gas insert for a compatible existing fireplace opening. A Natural Blaze burner and included blower bring flame and warm-air circulation into the room. Select the correct fuel and ignition, then complete the installation with the required surround and interior components.

Keep the hearth. Refine the finish.
A separately purchased black surround covers the gap between the insert and the existing fireplace opening. Choose the surround size after measuring the opening and checking the installation manual; the insert’s nominal size is not a substitute for those measurements.
Fuel & Compatibility
Choose the natural gas or liquid propane variant to match the installed supply. Fuel and ignition must be confirmed before ordering. Vent-free installation is subject to local requirements, room-size restrictions and the manufacturer’s instructions; a qualified installer must verify suitability.
Product Details
- Natural Blaze burner system with 135 CFM blower and screen.
- Natural gas: up to 28,000 BTU/hr; propane: up to 27,000 BTU/hr.
- Millivolt and electronic ignition configurations.
- Required surround and liner are separate accessories.
What comes with your order
Selected Solstice insert with its specified burner/control system, 135 CFM blower and screen. Surround, required liner and log-set selection must be confirmed separately; this listing does not include a surround.
Manuals, Specifications & Warranty
Download the documents below. Match the exact SKU, fuel and product edition before planning or installation.
Confirm dimensions and installation requirements in the current model-specific installation manual before construction.
Manufacturer warranty
The current Hearth & Home Technologies limited warranty provides 20 years of parts coverage and 3 years of labor for the gas firebox/heat exchanger. Other components have different coverage periods. Purchase, installation, maintenance and other conditions and exclusions apply.
Questions Before You Order
How do I choose the fuel and control option?
Match the variant’s fuel to your gas supply and confirm its ignition/control requirements with your installer. Do not assume a field conversion is available.
What should I check before the wall or opening is built?
Confirm the exact model, framing or existing-opening dimensions, clearances, gas connection and all required finishing components against the installation manual.
Specifications & Installation Dimensions
| Brand | Monessen |
|---|---|
| Product type | Vent-Free Gas Insert |
| Material | Steel |
| Finish | Black |
| Appliance front width | 33-3/8" |
| Appliance height | 23-7/8" |
| Appliance depth | 18-1/4" |
| Viewing area | 31 x 16.5" |
| Minimum existing opening: front width | 33" |
| Minimum existing opening: rear width | 22-3/4" |
| Minimum existing opening: height | 23-7/8" |
| Minimum existing opening: depth | 15-1/4" |
Model & Configuration
| SKU | Configuration |
|---|---|
| VFI33LNV | 28,000 BTU N.G. Vent Free Insert, Millivolt Control w/blower, Traditional Style |
| VFI33LPV | 27,000 BTU L.P. Vent Free Insert, Millivolt Control w/blower, Traditional Style |
| VFI33LPI | 27,000 BTU L.P. Vent Free Insert, IPI Control w/blower, Traditional Style |
| VFI33LNI | 28,000 BTU N.G. Vent Free Insert, IPI Control w/blower, Traditional Style |
Confirm all framing, clearance and finishing dimensions with your qualified installer before ordering or construction. Product dimensions and shipping-package dimensions are not interchangeable.
Choose your configuration
Check your fuel, fit and required components, then select your model.
