TL;DR — A working summary

Wood-to-gas conversion has three primary specifications: gas log set in the existing wood firebox (most affordable, retains the firebox visually), gas insert in the existing firebox (sealed combustion, higher efficiency, modified appearance), and complete firebox replacement with a new gas unit (most flexible, used when the existing firebox is undersized or damaged). Each requires a chimney inspection, gas line, and code compliance. Lead times: 4–10 weeks. Investment: $4,500–$–+ depending on scope.

The three primary approaches

1. Vented gas log set

A set of ceramic logs with a burner, installed inside the existing wood firebox. Uses the original chimney and damper.

• **Best for:** preserving the original wood firebox visually, modest budget, period homes
• **Pros:** retains firebox character, reversible, lower cost
• **Cons:** less efficient (warm air goes up the flue), damper must remain open during use

2. Direct-vent gas insert

A sealed combustion unit installed inside the existing firebox, with its own intake and exhaust running up the existing chimney. The original firebox becomes a frame; the insert provides the actual fire.

• **Best for:** higher efficiency, modern function, owners who use the fireplace regularly
• **Pros:** sealed combustion (better efficiency), flames visible behind glass, controllable
• **Cons:** changes the visual character of the original firebox, glass front rather than open fire

3. Full firebox replacement

The existing firebox is removed and a new gas unit (often linear contemporary) is installed in its place.

• **Best for:** modernization projects, contemporary aesthetics, situations where the original firebox is failing
• **Pros:** complete design flexibility, contemporary linear and modern shapes available
• **Cons:** highest cost, structural and design coordination, often eliminates the original architectural language

The conversion process

Step 1 — Inspection

A Level 2 chimney inspection by a CSIA-certified sweep confirms the existing chimney is sound and appropriate for the planned conversion. This includes:

• Video scope of the flue
• Examination of the firebox condition
• Damper inspection
• Cap, crown, and flashing review

If the chimney needs work — relining, crown rebuild, or other masonry — that’s specified before conversion.

Step 2 — Specification

Based on the inspection and homeowner goals:

• Type of conversion (log set, insert, full replacement)
• Specific product selection
• Surround treatment (existing, modified, or replaced)
• Gas line route from meter or appliance trunk
• Electrical for ignition (if not millivolt)
• Control system
• Smart-home integration (where applicable)

Step 3 — Permits

Mechanical and gas permits are pulled with the local municipality. Highland Park, University Park, and most DFW cities require both for any gas appliance installation.

Step 4 — Procurement

Lead times for premium gas units are 6–14 weeks. Procurement is initiated as soon as specification is finalized.

Step 5 — Installation

• Gas line extension to the firebox location
• Pressure test
• Existing firebox preparation (cleaning, masonry repair if needed)
• Unit installation
• Vent connection (using existing chimney for log sets and inserts; new vent for some replacements)
• Electrical for ignition
• Control system installation
• Surround integration (if modified)

Step 6 — Inspection and commissioning

• Municipal inspection
• Pressure test verification
• First-light test with verification of proper combustion
• Walk-through with homeowner

Comparison: Investment by approach

| Approach | Investment range | Timeline | Best for |

|—|—|—|—|

| Vented log set | $2,500–$–+ | 2–4 weeks | Period preservation, modest budget |

| Direct-vent insert | $6,500–$–+ | 4–8 weeks | Modernization, regular use |

| Full firebox replacement | $15,000–$–+0+ | 6–12 weeks | Contemporary redesign, design flexibility |

| Conversion in estate-grade restoration | $25,000–$–+0+ | 12–20 weeks | Architectural preservation with modern function |

Maintaining the architectural language

For period homes — Tudor, French eclectic, Colonial Revival — the conversion can be done sympathetically to preserve the architectural intent:

• **Use a vented log set in the original firebox.** The firebox itself remains; the gas logs sit where the wood logs would.
• **Specify ceramic logs that read correctly.** Hand-painted ceramic logs in oak or birch patterns are convincing at normal viewing distance.
• **Conceal controls.** Wall switches recessed into adjacent millwork or paneling. Remote-only operation. No visible touchpad on the firebox.
• **Maintain the damper.** Even with a vented log set, the damper is operated normally — closed when not in use, open during use.
• **Preserve the surround.** No modifications to the original surround unless restoration is part of the project.

For contemporary homes, the design conversation is different — the fireplace can be redesigned as a feature element with a linear or contemporary unit replacing the original entirely.

Code considerations

Across DFW:

• Permits required for nearly all conversions
• Direct-vent units strongly preferred over vent-free
• Vent-free units restricted in most Dallas-area municipalities
• Gas line must be properly sized for the appliance load
• CO detector required in the home
• Manual gas shutoff within reach of the appliance

When to call us

For wood-to-gas conversion specification, product selection, and installation, we work directly with homeowners, designers, and architects. By appointment.

Call 469-992-4912.

FAQ

Most can. The chimney must be inspected and may need relining; the firebox dimensions must accommodate the chosen unit; gas service must be available.

With a vented log set, no — the burner sits in the firebox and can theoretically be removed. With an insert or full replacement, the wood-burning capability is replaced.

A direct-vent insert is significantly more efficient (50–80% efficiency) than an open wood fire (5–15% efficiency for warming the room).

Standard for premium installations. Lutron, Crestron, Control4, and Savant all integrate with appropriate gas units.

Premium gas units produce convincing flames at normal viewing distances. Direct comparison with a wood fire reveals differences, but standalone the gas fire reads as fire.

4–10 weeks from initial inspection to commissioning, depending on scope and procurement.

Vented log sets are largely reversible. Inserts and full replacements are not — they modify the firebox.

Visit by appointment

Call 469-992-4912 to schedule a consultation.

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Internal links

• [Gas Conversion Service](https://spacefireplaceservices.com/gas-conversion/)
• [Linear Fireplace Service](https://spacefireplaceservices.com/linear-fireplace/)
• [Specifying Linear Fireplace](https://spacefireplaceservices.com/learn/specifying-linear-fireplace-architect-guide/)
• [Ventless vs Direct-Vent TX Code](https://spacefireplaceservices.com/learn/ventless-vs-direct-vent-fireplace-tx-code/)
• [frisco/" class="auto-entity-link" data-term="Newman Village">Newman Village Frisco](https://spacefireplaceservices.com/areas/newman-village-frisco/)

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