Kozy Heat Chaska 34 Gas Insert
The Kozy Heat Chaska 34 is a slim-profile direct-vent gas fireplace insert engineered specifically for older masonry fireplaces where deeper inserts simply won't fit. With a modulating 18,500 to 34,000 BTU/hr burner, 77% efficiency, just 16 inches of depth, and three media options (log, rock, or glass), the Chaska 34 turns an old wood-burning fireplace into a clean, efficient, customizable gas unit in installations that other inserts can't physically accommodate.
What Makes the Chaska 34 Different
If you've already measured your existing fireplace and discovered it's too shallow for most gas inserts, the Chaska 34 was specifically engineered for your situation.
Beyond the slim depth, the Chaska 34 offers features that set it apart from typical entry-level inserts:
- Modulating burner technology — output continuously adjusts between 18,500 and 34,000 BTU/hr based on room temperature demand, rather than the cycling on/off of single-stage burners. More consistent comfort, lower gas consumption.
- 77.0% efficiency — among the highest efficiencies in Kozy Heat's insert and retrofit lineup, second only to the Springfield 36 wall-mounted retrofit at 79.5%
- Three media options — choose between Log, Rock, or Glass format firebox media to match your interior style. Most competing inserts offer only one media option (typically logs).
- Light weight (149 lbs) — easier handling during installation than heavier inserts; reduces structural concerns about the existing fireplace hearth supporting the unit
- Ceramic glass — withstands higher operating temperatures than tempered glass; preserves clarity over years of heat cycling
- Direct vent sealed combustion — no indoor air used for combustion, no exhaust into the room, dramatically higher efficiency than the wood-burning fireplace it replaces
Will the Chaska 34 Fit Your Fireplace?
This is the most important question for any gas insert purchase, and the one you need to answer BEFORE ordering. The Chaska 34 requires an existing masonry or factory-built non-combustible fireplace opening that meets these minimum specifications:
| Existing Fireplace Requirement | Minimum |
|---|---|
| Front opening width | At least 33-1/2" |
| Front opening height | At least 23-1/2" |
| Back wall width | At least 24-1/2" |
| Back wall height | At least 17-3/8" |
| Cavity depth | At least 16-3/8" (this is the Chaska 34's key advantage — most other inserts require 20"+ depth) |
| Chimney condition | Solid-fuel masonry or factory-built non-combustible chimney in good structural condition; must be able to accept a co-linear flexible vent through the existing flue |
| Hearth/floor protection | Non-combustible hearth in front of the fireplace per local code requirements |
| Gas line access | Existing gas line or ability to route a new gas line to the insert location |
Specifications
| Brand | Kozy Heat |
|---|---|
| Model | Chaska 34 |
| Product Type | Direct Vent Gas Fireplace Insert |
| BTU Input | 18,500 – 34,000 BTU/hr (modulating) |
| Efficiency | 77.0% |
| Vent Type | Direct Vent (Co-linear through existing chimney) |
| Fuel Type | Natural Gas or Liquid Propane (specify at order; conversion kits available) |
| Overall Width | 33-3/8 in. |
| Overall Height | 23 in. |
| Overall Depth | 16 in. (slim profile) |
| Weight | 149 lbs. |
| Viewing Area | 30-3/4 in. (W) × 17-13/16 in. (H) |
| Glass | Ceramic |
| Burner Type | Modulating (continuous BTU adjustment) |
| Media Options | Log, Rock, or Glass (specify at order) |
| Bedroom Approved | Yes (direct vent design) |
| Min Fireplace Front Width | 33-1/2 in. |
| Min Fireplace Back Width | 24-1/2 in. |
| Min Fireplace Front Height | 23-1/2 in. |
| Min Fireplace Back Height | 17-3/8 in. |
| Min Fireplace Depth | 16-3/8 in. |
| Estimated Heating Area | Up to ~1,200 sq. ft. (varies by insulation, ceiling height, climate) |
| Made In | USA (Hussong Manufacturing, Minnesota) |
Available Options & Accessories
The Chaska 34 offers several customization options to match your interior and use case:
- Media Format — Log, Rock, or Glass (specified at order; one is required)
- Fuel Type — Natural Gas or Liquid Propane (specified at order; conversion kits available)
- Decorative Fronts — exterior trim around the firebox opening. Browse our Fireplace Fronts collection for available styles compatible with the Chaska 34.
- Refractory Liner Options — interior firebox lining visible behind the flame; available options typically include traditional brick, modern panels, or contrast-forward finishes
- Fan Kit — optional add-on that circulates warm air more aggressively, extending heat reach further into the room. Requires 110V power.
- Remote Control Options — basic on/off remote, thermostat remote, or programmable remote
- Vent Kit Components — sized for your specific installation (vent length, configuration, termination type)
For configuration assistance — choosing the right media format, picking the right front and refractory, or planning the install — contact us. We do this every day.
Brand
Kozy Heat®
Transform your existing wood-burning fireplace into a clean, convenient, and efficient source of warmth with a Kozy Heat gas fireplace insert. Designed to fit inside many masonry or factory-built wood fireplaces, Kozy Heat gas inserts deliver realistic flame presentation, dependable heat, and the everyday convenience of natural gas or propane.
A gas insert uses a sealed firebox and venting system to draw combustion air from outdoors and exhaust fumes safely outside through the existing chimney chase.
Distinctive Features
Convert an Existing Fireplace Without Starting Over
Enjoy the charm of your existing fireplace with the push-button convenience of gas. Kozy Heat gas inserts are a great solution for replacing messy wood fires with steady, controllable comfort.
Direct Vent Performance
Get warmth where you want it most. Kozy Heat direct vent gas inserts are built to deliver dependable heat while using your existing chimney as the venting path.
Traditional or Contemporary Fireplace Looks
Whether your home leans rustic, transitional, or modern, Kozy Heat gas inserts give you design flexibility with realistic flame options, decorative fronts, and finish choices that complete the room.
Kozy Heat Gas Insert FAQs
What is a Kozy Heat gas fireplace insert?
A gas fireplace insert is a gas-burning appliance installed inside an existing wood-burning fireplace. It updates the old fireplace with a sealed gas firebox, burner system, and venting.
Can a Kozy Heat gas insert go into my existing fireplace?
In many cases, yes. Gas inserts are designed for existing masonry or approved factory-built wood fireplaces, but exact fit depends on the fireplace opening, chimney condition, venting requirements, and the specific Kozy Heat model.
Do Kozy Heat gas inserts use natural gas or propane?
Many Kozy Heat gas inserts are available for natural gas or propane. Fuel availability depends on the model and installation setup.
Do I still need my chimney?
Yes, but not in the same way as a wood fire. A direct vent gas insert commonly uses the existing chimney as a chase for the intake and exhaust venting system.
Are gas inserts good for zone heating?
Yes. A Kozy Heat gas insert can help heat the room or area where you spend the most time, reducing reliance on whole-home heating in some situations.
Do Kozy Heat gas inserts require professional installation?
Yes. Gas inserts should be measured, selected, vented, connected, and tested by a qualified fireplace professional. At all Leisure Time Inc. locations we offer the services necessary to get your fireplace insert properly installed.
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