Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Why Thousand Oaks Homeowners Choose Gelco Chimney Cleaning
Level Two Chimney Thousand Oaks provides independent Gelco chimney cleaning and repair service for all Gelco factory-built fireplace series across Gelco in Thousand Oaks and the Conejo Valley. We stock OEM-compatible Gelco parts locally and back every job with a written price before work starts and a documented photo record when it’s done. Call us at (424) 786-6130.
We’re not affiliated with Gelco. We’re an independent service provider who has worked on enough Gelco units in Thousand Oaks to know their specific failure patterns. The HE Series secondary burn tubes that clog with creosote. The Heat-Circulating refractory panels that spall and drop debris. The factory dampers that warp and stick open, sending heated air straight up the flue. These aren’t generic fireplace problems. They’re Gelco problems, and we know how to fix them.
Thousand Oaks sits in California’s High Fire Hazard Severity Zone, where Ventura County Fire can cite homeowners for missing or corroded spark arrestors. A Gelco fireplace with a stuck-open damper or creosote-heavy flue isn’t just inefficient here, which is why our Chimney Cleaning & Sweep services focus on prevention. It’s a liability. We treat arrestor inspection as standard on every Gelco service, not an add-on.
Why Trust Level Two Chimney Thousand Oaks for Your Gelco Chimney Cleaning?
Corrine Halstead, our owner, grew up in the Bronx and learned her trade fundamentals at Apex Technical School in Queens before relocating to Southern California. She and her crew have been working chimneys across Thousand Oaks for several years, including Gelco repair in Oak Park and older homes near Lang Ranch where wood-burning Gelco fireplaces are still a weekend fixture. Her reputation is built on showing homeowners exactly what the inspection camera found, photo by photo, before any work order gets written.
Here’s what that means for your Gelco unit. We know the HE Series firebox geometry well enough to spot when secondary burn tube ports are clogging before the smoke starts backing up into your room. We know the Heat-Circulating models well enough to distinguish between a refractory panel that can be patched and monitored versus one that’s displaced and unsafe. We stock Gelco-compatible dampers, baffle bricks, and refractory panels locally, sourced through Haven’s buying network, so we’re not ordering parts after we’ve already been to your home once.
Every Gelco service follows the Haven Standard we adopted in 2009. Clause 1: written price, written scope, written warranty before any work begins. Clause 4: documented photo record on every visit, running continuously since we started. No exceptions. Our 365-Day Done Right Promise covers every Gelco repair and cleaning we perform.
Common Gelco Chimney Cleaning Problems We Fix in Thousand Oaks

- HE Series secondary burn tube ports clogged with creosote. The HE Series uses secondary combustion tubes to reburn smoke and boost efficiency. Those perforated tubes clog fast in Thousand Oaks because our mild Conejo Valley winters produce cooler, smoldering burns that deposit Stage 1 and Stage 2 creosote faster per use than steady cold-climate firing. When the ports plug, the reburn dies. The fire won’t climb past a lazy smolder. Visible smoke spills into the room when you open the glass doors. We sweep the firebox, extract and clear the tubes, and verify port flow before reassembly.
- Heat-Circulating refractory panels cracked and spalled. The HC Series firebox is lined with refractory panels and baffle bricks that take direct flame. Over-firing, which is common when owners crank the damper wide open on a cold Thousand Oaks evening, causes thermal shock. Panels crack. Baffle bricks spall and drop ceramic debris onto the grate. We inspect every panel with the camera, document the damage, and replace with OEM or listed equivalent parts where the originals are discontinued.
- Factory damper warped and stuck open. Older Gelco units, especially in Thousand Oaks tract homes built during the 1970s and 1980s master-planned boom, have steel dampers that warp when run wide open repeatedly. A warped damper won’t seat. Heated room air escapes straight up the flue. Your furnace works harder. We free the pivot, reseat or replace the damper plate, and verify full closure with a smoke test.
- Perforated heat-exchange cylinder sooted over. The HC Series draws combustion air through a perforated cylinder that wraps the firebox. When that cylinder cakes with soot, two things happen: radiant heat drops, and the blower starts pushing grit and burnt odor into your living room. We remove the cylinder assembly, clean the perforations to spec, and verify airflow before the blower goes back on.
- Zero-clearance clearances compromised by aftermarket parts. The Gelco ZCS Series depends on precise air gaps between the firebox shell and surrounding framing. We’ve found units in Thousand Oaks where previous owners or handymen installed loosely-dimensioned aftermarket refractory panels that encroach on those gaps. We measure, document, and correct with properly-sized OEM or listed equivalents.
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AfterGelco Parts & Our Repair-vs-Replace Approach
For Gelco fireboxes, we go OEM whenever the exact refractory panel, damper, or baffle is still available. Aftermarket firebox parts are dimensioned loosely and can void what’s left of safe clearances. Where Gelco has discontinued a part, we use a listed, correctly-sized equivalent and document the substitution in your photo record.
Our honest stance: hairline cracks in refractory get patched with refractory cement and scheduled for recheck. Displaced or missing panels, a warped firebox shell, or a cracked HE Series outer wrapper mean the unit is done. Rebuilding it isn’t safe and isn’t worth your money. We’ll say so plainly, show you the camera evidence, and quote a replacement if you want one.
We stock Gelco-compatible dampers, baffle sets, and refractory panels locally through Haven’s buying network. Most Westlake Village Gelco service calls and repairs in Thousand Oaks don’t require a second trip. Call (424) 786-6130 for a written estimate.
Our Gelco Service Process - Step by Step

- 1
Diagnosis with camera inspection. We run a chimney camera the full length of your Gelco flue per NFPA 211 Level 2 standard. For HE Series units, we inspect secondary burn tube port condition. For HC models, we check heat-exchange cylinder perforation and refractory panel integrity. We photograph everything. Here’s what the camera showed. Here’s what it costs. You decide.
- 2
Written scope and price. Before any work starts, you get a written price, written scope, and written warranty under Haven Standard Clause 1. No verbal quotes. No “we’ll see how it goes.”
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Cleaning and repair. We sweep to remove creosote and debris, including Santa Ana wind deposits common in Thousand Oaks hillside neighborhoods. We perform the agreed repair: tube extraction and clearing, damper reseating, refractory replacement, or heat-exchange cylinder cleaning.
- 4
Testing and documentation. We smoke-test the flue, verify damper operation, and run the blower on HC units to confirm clean airflow. Clause 4 of the Haven Standard requires a documented photo record on every job. You get the photos, the written scope, and the warranty before we leave.
Gelco Products We Service & Install in Thousand Oaks
We service and install across the Gelco factory-built fireplace line: the Heat-Circulating (HC) Series with its perforated heat-exchange cylinder and blower system; the HE Series high-efficiency wood fireplace with secondary combustion tubes; the See-Through / Double-Face Series for shared-wall installations; and the Zero-Clearance Series (ZCS) for framed chimney chase applications. We stock HC and HE Series dampers, baffle brick sets, and refractory panels locally. For discontinued Gelco parts, we source listed equivalents through our Haven network and document every substitution.
We Also Service These Brands

We’re not a single-brand shop. Level Two Chimney Thousand Oaks services DuraFlex chimney liner systems, HeatShield cerfractory flue resurfacing, Olympia Chimney stainless liners, Famco chimney caps and dampers, and Copperfield chimney supplies. Our multi-brand capability means we can recommend the right component for your system instead of forcing a Gelco part where it doesn’t belong.
FAQs - Gelco Chimney Cleaning Service in Thousand Oaks
No. We are an independent Gelco service provider, not affiliated with or authorized by Gelco Manufacturing. Our expertise comes from years of hands-on work with Gelco units across Thousand Oaks, not from factory certification. We use OEM-compatible and listed equivalent parts, and we document every repair with photos you can review.
Usually it’s creosote clogging the secondary burn tube ports, combined with a warped or stuck damper that’s not drawing properly. The HE Series needs those ports open for secondary combustion. When they plug, the fire smolders, smoke backs up, and opening the doors releases it into your room. We sweep the firebox, extract and clear the tubes, and fix the damper. Call (424) 786-6130 for an exact quote - estimates are free.
Some HC Series panels are still available OEM. Where Gelco has discontinued a part, we use a listed, dimensionally-correct equivalent and document it in your photo record. We don’t install loosely-sized aftermarket panels that encroach on zero-clearance air gaps. Bring us your model number and we’ll confirm part availability before we book the job.
Hairline cracks get patched with refractory cement and scheduled for recheck. Displaced, missing, or through-cracked panels get replaced. A panel that’s dropping spalled material onto your grate is past patching. We’ll show you the camera footage, explain which category yours falls into, and quote both options where patching is viable.
The perforated heat-exchange cylinder is likely sooted over. When those perforations clog, radiant heat drops and the blower pushes grit and odor into the room instead of warm air. We remove the cylinder, clean the perforations to spec, and verify airflow. It’s a standard HC Series service we perform regularly in Thousand Oaks.
NFPA 211 recommends annual inspection for all solid-fuel appliances. In Thousand Oaks, we also factor the HFHSZ requirement for functional spark arrestors and the Santa Ana wind debris that collects in flues between burns. Most Gelco owners in the Conejo Valley do well with annual sweeping before the first fall fire. Call (424) 786-6130 to schedule - estimates are free.
Book Your Gelco Service in Thousand Oaks, CA

Call (424) 786-6130 for a free written estimate on your Gelco chimney cleaning or repair. We answer live 24 hours a day. Every Gelco service includes an NFPA 211 Level 2 camera inspection, a written price before work starts, and a documented photo record when it’s done, backed by our 365-Day Done Right Promise.
Written by Corrine Halstead, Owner at Level Two Chimney Thousand Oaks, serving Thousand Oaks since 2009.





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