A drafty living room or a wood-burning fireplace you’ve stopped using is a missed opportunity for real warmth. MT Dunn Plumbing handles gas fireplace installation for Hillsboro homes, covering gas line connections, venting configuration, and code-compliant hookups from the first visit to the final inspection. Our licensed technicians work with gas inserts, built-in units, log sets, and freestanding stoves, making sure every installation meets Oregon Residential Specialty Code requirements and local Hillsboro permit standards. Whether you’re converting a wood-burning fireplace or adding a gas unit to a room without one, we take care of every step so the finished product is safe, functional, and ready to use.
Our highly experienced plumbing professionals will contact you for a free estimate and consultation.
Homeowners across Hillsboro choose MT Dunn Plumbing for safe and professional gas fireplace installation. Customers value our quality workmanship, clear communication, and attention to detail from start to finish. Whether you’re installing a new gas fireplace or replacing an older unit, our experienced team delivers reliable service to help you enjoy a warm, comfortable, and efficient home.
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Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. 
Trustindex verifies that the original source of the review is Google. Installing a gas fireplace goes beyond placing a unit on the wall. Gas line work, venting routing, combustion safety, and permit compliance all have to come together correctly.
Licensed Gas Fitters
Every installation is completed by certified technicians qualified to work on gas lines and fuel-burning appliances in Oregon.
Personalized Fireplace Selection
We help you choose the right insert, built-in, log set, or freestanding stove for your home and heating needs.
Permit Coordination
We obtain required permits and coordinate inspections with the City of Hillsboro for a hassle-free installation.
Gas Line Capacity Assessment
Existing gas lines, shutoff valves, and fuel supply are evaluated before installation begins.
Code-Compliant Venting
Direct vent, B-vent, and vent-free systems are installed according to Oregon Mechanical Specialty Code and manufacturer requirements.
Existing Fireplace Evaluation
We inspect fireboxes, flues, clearances, and structural conditions before converting or upgrading an existing fireplace.
Comprehensive Safety Testing
Every installation includes combustion analysis, gas leak detection, ignition testing, and operational verification.
Old Appliance Removal
Existing fireplaces, inserts, or gas log sets are safely disconnected and removed as part of the service.
Upfront, Transparent Pricing
Written estimates clearly outline equipment and labor costs before any work starts.
Fast Scheduling and Professional Workmanship
Most installations are scheduled quickly, completed efficiently, and backed by careful attention to safety, performance, and lasting reliability.
These are the standards that keep Hillsboro homeowners calling MT Dunn Plumbing back when gas appliance work comes up.
Gas fireplace installation follows a specific sequence to make sure every connection is safe and the final unit performs correctly. Here’s how we handle it:
A technician visits to evaluate your room layout, existing gas line location and capacity, current fireplace opening if applicable, and venting options before recommending an installation approach.
Based on room square footage, heating demand, and whether a firebox already exists, we help you select the right unit type: insert, built-in, log set, or freestanding stove.
Technicians determine the correct venting method for your unit and home construction, whether that’s a direct vent coaxial pipe through an exterior wall, a B-vent through an existing chimney, or a listed vent-free installation where Oregon code permits.
Before work begins, MT Dunn Plumbing secures the mechanical permit required by the City of Hillsboro, keeping the installation fully documented and inspection-ready.
The supply line is inspected for capacity, shutoff valve placement, and connection point accessibility. Upgrades to the gas line or valve are completed at this stage if needed.
For inserts, the existing firebox opening is measured and cleared. For built-in units without an existing firebox, the installation area is framed and finished to manufacturer clearance specifications.
The gas fireplace is positioned, leveled, and secured according to manufacturer installation instructions and Oregon Residential Specialty Code clearance requirements
Technicians connect the gas supply line, route and seal the venting system, and wire any wall switches, thermostats, or remote receiver units included with the appliance.
The gas connections are pressure-tested for leaks, the ignition system is cycled, and combustion quality is verified to confirm the unit is operating safely and efficiently.
The unit is brought to full operating temperature, flame height and spread are confirmed against the manufacturer’s specification, and heat output is verified across the room.
We walk you through operating the unit, using the controls or remote, and the manufacturer’s recommended maintenance schedule before calling the job complete.
Most gas fireplace insert installations in Hillsboro are completed in three to five hours. Built-in installations or jobs requiring new gas line runs may take longer depending on the scope of the venting and gas work involved.
Not every home situation is the same, but these are the scenarios where a gas fireplace installation makes the most sense:
A few factors affect both the unit choice and the installation process. These are worth discussing with your technician before any work begins:
From what we’ve seen in the field, the answer is an unqualified yes. At MT Dunn Plumbing, we’ve handled gas fireplace installations across Hillsboro homes in enough variety to know exactly where a non-professional install goes wrong and how quickly it becomes a serious problem.
A gas fireplace isn’t a plug-in appliance. It involves a live gas line connection, a venting system that has to be airtight, and a combustion process that produces carbon monoxide if anything is off. A handyman who installs units occasionally or a homeowner going off a YouTube guide might get the pilot lit and the flames going, but they can’t confirm the venting is drawing properly, the gas connection is leak-free, or the installation meets Oregon code. Those aren’t minor gaps in knowledge. They’re the conditions that produce carbon monoxide exposure, gas leaks, and failed city inspections.
We’ve walked into homes where previously installed gas fireplaces had venting that terminated too close to a window, gas flex connectors that weren’t rated for concealed installations, and units placed without the required hearth extension clearances. In every case, the homeowner had no idea anything was wrong until we came in for an unrelated call. Fixing those installs cost significantly more than a professional job would have from the start.
The cost difference between a licensed installation and a DIY attempt narrows fast once you factor in permit fees, inspection costs, and the possibility of having to redo connections that didn’t pass. We think of a professional install as the baseline, not an upgrade because your family’s safety isn’t the place to cut the budget.
Hillsboro homes vary in age, gas line configuration, and construction style, and those differences matter when routing venting or sizing a gas connection. An experienced local plumber accounts for those variables from the start.
When it comes to a gas appliance connected to your home’s fuel supply, the job being done right isn’t something you want to guess at. Our technicians handle the permits, the connections, the venting, and the safety checks so you know it was done correctly because we documented every step of it.
Whether you have an existing firebox, a finished room with no current fireplace, or a wood-burning unit you want to convert, MT Dunn Plumbing helps you identify the right appliance based on your space, gas line access, and venting options.
Gas Fireplace Type
Gas Fireplace Insert
Built-In Gas Fireplace
Gas Log Set
Freestanding Gas Stove
Direct Vent Gas Fireplace
B-Vent Gas Fireplace
Vent-Free Gas Fireplace
Natural Gas Fireplace
Propane Gas Fireplace
Best For
Homes with existing masonry or factory-built firebox
New construction or rooms without an existing firebox
Homes with a functioning chimney and open masonry fireplace
Rooms with no existing fireplace or chimney
Tightly built modern homes
Homes with an existing vertical chimney flue
Spaces where exterior venting isn't feasible
Homes on natural gas service
Rural Hillsboro properties without natural gas access
Key Benefits
Converts an unused wood-burning fireplace into an efficient gas unit
Installed directly into a framed wall cavity with flexible placement options
Lower cost option that adds a gas flame to an existing open firebox
Vents through a wall or ceiling; no firebox required
Draws combustion air from outside and exhausts through a sealed coaxial pipe
Uses natural draft through an existing chimney; works with most older homes
No venting required; limited by Oregon code on placement and BTU rating
Cost-effective fuel source with consistent supply pressure
Provides the same performance using an LP tank supply
No matter which unit fits your home, our licensed technicians confirm the gas connections, venting, and combustion setup meet every applicable Oregon standard before we leave the job.
Fast Response • Upfront Pricing • Guaranteed Work
MT Dunn Plumbing provides licensed, permit-pulled, code-compliant gas fireplace installation in Hillsboro, OR, for homeowners and businesses who want the job done right the first time.
A gas fireplace that stops working mid-winter or one that’s leaking gas needs attention the same day, not next week. Here’s how we respond:
Priority Scheduling
Calls involving gas leaks or non-functional appliances go to the front of the queue.
Stocked Parts and Components
Common ignition components, thermocouples, gas valves, and flex connectors are kept on our trucks to avoid delays.
Same-Visit Assessment and Repair
In most cases, the problem is diagnosed and corrected in a single visit without needing a return trip.
Gas Leak Response
If an active gas leak is suspected, we treat it as an emergency, confirm the supply is shut off, and test the full connection path before restoring service.
Clear Estimates Before Work Starts
You’ll have a firm price for parts and labor before we begin, even on an urgent call.
Safety Checks on Every Visit
Combustion testing and leak verification are completed on every service call, whether the job is an emergency or a scheduled repair.
Most insert installations take three to five hours. Built-in units or installations requiring new gas line runs may take longer depending on the venting path and gas supply work involved.
Yes. Oregon requires a mechanical permit for gas fireplace installations, and MT Dunn Plumbing pulls and manages that permit as part of every job.
An insert fits into an existing firebox opening in a masonry or factory-built fireplace. A built-in unit is installed directly into a framed wall cavity and does not require an existing firebox.
Yes. We evaluate the existing firebox dimensions, flue condition, and gas line access before recommending the right insert or conversion approach for your specific fireplace.
Vent-free gas fireplaces are permitted under Oregon code in specific locations but are prohibited in bedrooms, bathrooms, and rooms below the minimum volume threshold for the appliance’s BTU rating. Our technicians confirm compliance before any vent-free unit is installed.
A direct vent unit uses a sealed coaxial pipe system to draw combustion air from outside the home and exhaust combustion gases back outdoors through the same wall penetration, keeping indoor air quality unaffected.
Most manufacturers recommend annual service, including cleaning of the burner and logs, combustion and leak checks, ignition system inspection, and glass cleaning.
Yes. MT Dunn Plumbing provides gas fireplace installation for both residential and commercial properties throughout Hillsboro.
Don’t let an empty firebox or an outdated wood-burning unit sit unused another winter. Contact MT Dunn Plumbing to schedule a gas fireplace installation in Hillsboro with a licensed team that handles the permits, the gas connections, and the venting from start to finish.
Contact MT Dunn Plumbing today to book your installation.
At M T Dunn Plumbing, our team is committed to delivering dependable plumbing solutions for residential and commercial properties throughout Sherwood and the surrounding communities.
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