Regular price
$4,70892$4,708.92
Sale price
$3,48460$3,484.60
Save 26%
/
Need assistance? Talk to an Expert! Call Now (800) 923-4556 Or Chat With Us!
Special Offers
✅ Free Shipping On Orders Above $1,000
✅ Exceptional Customer Service
✅ Call (800) 923-4556 Or Chat With Us to get the lowest price!
placeholder
HPC Fire | Square Flat Fire Pit Inserts
HPC Fire 24-Inch Square Flat Fire Pit Insert - Electronic Ignition, 8 Configurations
The HPC Fire 24-Inch Square Flat Fire Pit Insert is a stainless steel outdoor gas fire feature designed for installation in a compatible recessed fire pit enclosure.
Available with PENTA18 or TOR-PENTA18 burner configurations, the series offers listed heat outputs of 125,000 BTU or 140,000 BTU, respectively.
Choose from Natural Gas (NG) or Liquid Propane (LP), with either 120VAC or 24VAC hot surface electronic ignition.
The eight available configurations let homeowners, contractors, and outdoor living designers match the insert to the planned fuel supply, electrical system, and burner requirements.
Quick Answer: Which HPC Fire 24-Inch Insert Should You Choose?
Choose PENTA18 for the standard 125,000 BTU burner configuration. Choose TOR-PENTA18 for the 140,000 BTU TOR burner configuration.
After selecting the burner, choose the NG or LP fuel version and the 120VAC or 24VAC ignition version that matches your installation requirements.
All eight models are designed for outdoor recessed fire pit installations. Confirm enclosure dimensions, ventilation, drainage, clearances, gas supply, and electrical requirements before ordering.
Key Features of the HPC Fire 24-Inch Square Flat Fire Pit Insert
The HPC Fire Square Flat series combines a recessed stainless steel insert design with manufacturer-configured gas burners and electronic ignition systems.
304 Stainless Steel Construction
The manufacturer describes this insert family as using 18-gauge, 304 stainless steel construction. Its flat profile is intended to integrate into a properly designed outdoor fire pit enclosure.
Hot Surface Electronic Ignition
Each of the eight listed configurations uses hot surface electronic ignition. Select the voltage specified by the manufacturer SKU rather than assuming all electronic ignition inserts use the same power supply.
Two Burner Configurations
The PENTA18 configuration is listed at 125,000 BTU. The TOR-PENTA18 configuration is listed at 140,000 BTU.
Natural Gas and Liquid Propane Options
Separate manufacturer SKUs are provided for NG and LP installations. This allows buyers to select a configuration intended for the available fuel source.
Outdoor Recessed Installation
The flat insert design is intended for installation within a compatible outdoor fire pit structure, subject to the manufacturer's enclosure, ventilation, drainage, and clearance requirements.
CSA-Certified Product Family
The manufacturer identifies the Square Flat electronic ignition insert family as CSA-certified. Verify the applicable certification and listing information for the exact SKU and installation.
Important: The eight SKUs on this page do not contain the manufacturer's Hi/Lo designation. Do not assume Hi/Lo flame control or remote-control inclusion without confirmation for the exact configuration.
HPC Fire 24-Inch Square Flat Insert: All 8 Variants Compared
The primary differences between these configurations are the burner design, listed BTU output, fuel type, and electrical supply.
Manufacturer SKU
Burner
BTU
Fuel
Voltage
24FSSEI-SQ-NG/120VAC
PENTA18
125,000
Natural Gas
120VAC
24FSSEI-SQ-NG/24VAC
PENTA18
125,000
Natural Gas
24VAC
24FSSEI-SQ-LP/120VAC
PENTA18
125,000
Liquid Propane
120VAC
24FSSEI-SQ-LP/24VAC
PENTA18
125,000
Liquid Propane
24VAC
TOR-24FSSEI-SQ-NG/120VAC
TOR-PENTA18
140,000
Natural Gas
120VAC
TOR-24FSSEI-SQ-NG/24VAC
TOR-PENTA18
140,000
Natural Gas
24VAC
TOR-24FSSEI-SQ-LP/120VAC
TOR-PENTA18
140,000
Liquid Propane
120VAC
TOR-24FSSEI-SQ-LP/24VAC
TOR-PENTA18
140,000
Liquid Propane
24VAC
How to choose: Start with the required burner configuration, then confirm the fuel and ignition voltage. Do not select a model based on the 24-inch nominal size alone.
HPC Fire 24-Inch Square Flat Insert Technical Specifications
The following specifications summarize the shared characteristics of this product family and the differences between its eight configurations.
Specification
Details
Manufacturer
HPC Fire
Product Type
Fire Pit Inserts
Product Category
Square Fire Pit Inserts
Nominal Size
24 inches
Insert Shape
Square, flat profile
Burner Options
PENTA18 or TOR-PENTA18
PENTA18 Output
125,000 BTU
TOR-PENTA18 Output
140,000 BTU
Fuel Options
Natural Gas or Liquid Propane
Ignition
Hot surface electronic ignition
Electrical Options
120VAC or 24VAC
Construction
304 stainless steel, 18-gauge (manufacturer family specification)
Installation Type
Recessed / built-in outdoor enclosure
Certification
CSA-certified series as described in manufacturer documentation
Warranty Note
Manufacturer describes lifetime burner warranty coverage. Verify current written terms.
Choose Your HPC Fire 24-Inch Insert Configuration
Use the complete manufacturer SKU when selecting or verifying a Shopify variant. The TOR prefix identifies the TOR-PENTA18 burner; NG and LP identify the fuel; and the final suffix identifies the ignition voltage.
24FSSEI-SQ-NG/120VAC
Burner: PENTA18 Input: 125,000 BTU Fuel: Natural Gas Power: 120VAC
For natural gas installations with a compatible 120VAC electrical supply.
24FSSEI-SQ-NG/24VAC
Burner: PENTA18 Input: 125,000 BTU Fuel: Natural Gas Power: 24VAC
For natural gas installations using the manufacturer-approved 24VAC power supply arrangement.
TOR burner configuration for propane installations using the approved 24VAC power arrangement.
Variant selection: The selected Shopify variant must match the complete manufacturer SKU. Selecting a different option online does not change the fuel or electrical requirements of a physical insert.
Natural Gas vs. Propane and 120VAC vs. 24VAC
Fuel and voltage are essential compatibility decisions when ordering an electronically ignited fire pit insert.
Natural Gas (NG)
Select an NG-designated SKU only for an installation designed for the appropriate natural gas supply.
Verify gas supply capacity, connection requirements, and the manufacturer's installation instructions.
Liquid Propane (LP)
Select an LP-designated SKU for the intended propane system.
Do not assume an NG insert can operate on LP without manufacturer-approved conversion instructions and components.
Electrical Supply
The 120VAC and 24VAC ignition systems are separate configurations.
The manufacturer catalog identifies a 24VAC 100W HPC/SEBCO supply for insert-only 24VAC applications. Verify the correct supply and installation requirements.
Electrical planning: Do not connect a 24VAC model directly to a 120VAC supply. Electrical and gas connections must follow current manufacturer instructions and applicable codes.
Outdoor Installation, Ventilation and Clearance Requirements
HPC Fire Square Flat inserts are designed for installation within properly constructed outdoor fire pit enclosures.
The manufacturer family documentation identifies several important installation considerations.
Clearance Beneath the Insert
Manufacturer documentation calls for a minimum 2-inch clearance beneath the insert.
Enclosure Ventilation
The manufacturer family guidance calls for ventilation on at least two sides and at least 50% free air space within the enclosure.
Combustible Clearances
Required clearances vary by insert size and installation. Manufacturer documentation discusses a range of 36 to 48 inches across sizes.
Use the specific clearance requirements for the selected 24-inch configuration rather than treating this family-wide range as a final installation dimension.
Drainage and Support
The manufacturer describes drainage weep holes, a raised burner hub, and welded gas fittings as features of this insert family.
Verify that the enclosure provides suitable support, drainage, ventilation, and access for the intended installation.
Electrical and Gas Planning
Confirm the fuel supply, ignition voltage, required power components, and utility routing before completing the enclosure.
Important installation notice: The nominal 24-inch product size must not be used as the final enclosure cutout dimension. Verify the current manufacturer installation drawing for the exact SKU, including opening dimensions, support, ventilation, drainage, access, and combustible clearances.
Installation should be performed by qualified professionals in accordance with the manufacturer's instructions and applicable local requirements.
What to Check Before Buying an HPC Fire 24-Inch Insert
Before ordering, verify the specifications of the exact model rather than relying on product images or the shared 24-inch size designation.
1
Choose the Burner
Confirm whether your project calls for the PENTA18 burner rated at 125,000 BTU or the TOR-PENTA18 configuration rated at 140,000 BTU.
2
Confirm the Fuel
Match the NG or LP designation on the manufacturer SKU to the intended gas supply.
3
Verify Ignition Voltage
Select 120VAC or 24VAC based on the intended electrical arrangement and manufacturer requirements.
4
Check Enclosure Compatibility
Verify cutout dimensions, support, ventilation, drainage, and combustible clearances.
5
Verify Included Components
Confirm the included ignition components, controls, fire media, electrical accessories, and any separately required items.
Do not assume a remote or Hi/Lo flame control is included.
6
Review Warranty and Safety
Confirm current manufacturer warranty terms, applicable certifications, and model-specific safety instructions before purchase and installation.
Frequently Asked Questions About HPC Fire 24-Inch Square Flat Fire Pit Inserts
What is the difference between PENTA18 and TOR-PENTA18?
The standard PENTA18 configurations are listed at 125,000 BTU. TOR-PENTA18 configurations are listed at 140,000 BTU. Burner choice is part of the manufacturer SKU; the two configurations should not be assumed interchangeable.
Can I choose natural gas or liquid propane?
Yes. These eight SKUs include separate natural gas and liquid propane configurations. Select the version matching the intended fuel supply. Do not assume fuel conversion is possible without approved manufacturer instructions and components.
What is the difference between 120VAC and 24VAC ignition?
Both are hot surface electronic ignition configurations, but their electrical requirements differ. The 24VAC models need the appropriate manufacturer-approved low-voltage power supply arrangement. Confirm the required components for the exact SKU.
Do these inserts have Hi/Lo flame control or include a remote?
The eight SKUs listed here do not include a Hi/Lo designation, and the supplied manufacturer price list does not establish that a remote is included. Do not assume either feature without confirmation.
Can I install this insert in an existing fire pit?
An existing enclosure may be suitable only after verifying the opening dimensions, support, drainage, ventilation, combustible clearances, gas supply, and electrical requirements against the current manufacturer instructions.
What warranty is provided for these HPC Fire inserts?
The manufacturer catalog describes lifetime warranty coverage for burners in this insert family. This does not establish a lifetime warranty for every component. Confirm the current written warranty terms and exclusions.
Choose the Right HPC Fire 24-Inch Square Flat Insert
The right configuration depends on three primary decisions: burner design, fuel type, and ignition voltage.
Choose the PENTA18 for the 125,000 BTU configuration or the TOR-PENTA18 for the 140,000 BTU configuration.
Next, select the Natural Gas or Liquid Propane version and the 120VAC or 24VAC ignition system that matches the installation.
Before ordering, confirm the complete manufacturer SKU, enclosure dimensions, clearances, ventilation, drainage, fuel supply, electrical requirements, and separately required components.
With the correct specifications verified, you can select the HPC Fire 24-Inch Square Flat Fire Pit Insert configuration that fits your outdoor project.
We are an authorized dealers for every brand we sell!
Our SATISFACTION GUARANTEE and LOWEST PRICE GUARANTEE let you rest easy knowing you'll be taken care of, no matter what happens.
By buying from us you qualify for the full manufacturer warranty, save time and money! We ship directly to your door from the manufacturer's warehouse. Every product is checked for quality assurance and packaged with the utmost care to ensure it arrives in perfect working condition. We ship with only the best carriers including UPS, FedEx, USPS, and trusted freight companies to get your product to you in the fastest time possible. We even offer discounts with most orders just to make your day a little better.
We use encrypted SSL security to ensure your credit card information is 100% protected.
Product is great, free shipping was good, and unpacking and installing it was easy. Customer support was great too, both with the sales and shipping carrier. After much research…the Modern Flames Redstone is the one.
Ken Shuba
02/14/2023
A+ = both the sale, the shipping process, and the product
A+ = both the sale, the shipping process, and the product
Scott Werley
12/26/2022
Great Customer service
I purchased burner and fire box. I emailed and spoke with Jim . He helped me from start to finish. Great service
Scott G
12/19/2022
Beautiful Mantel
The mantel required a little bit of sanding and prep before painting, but was good quality. Flame Authority did an excellent job shipping and it arrived by freight in perfect condition.
The mantel assembled well. I ended up using some construction adhesive to glue the legs on to make it a little more sturdy. I cut pocket holes in the top to attach it to the wall.
Very happy with our purchase!
Ryan George
12/17/2022
Blaze Pro Portable Grill
I shopped for a grill for two people. I want it to last for ten years or more. I want it to get really hot for grilling steaks after they have been cooled sous vide. I want it to be useful also for lower temp cooking. This Blaze grill is perfect for me and my wife. Our purchase through Flame Authority was completed with no problems. I am totally satisfied with this grill and highly recommend it for anyone with similar needs.
Mary Ann
10/23/2022
Came as advertised and without any delays. Arrived quickly. No issues and would buy from flame authority again.
Brian McDonald
08/03/2022
I wanted to make sure of the size and features of this oven. I called Flame Authority and Mary answered the call. She gave me all the details and I was really amazed coz she really knows what she is selling. Expert with sales and communication. Thumbs Up!
James N. Johnson
07/12/2022
Great heating stove
I bought the stove couple weeks ago and ended up having a chance running it a few days I am very pleased with the outcome of the amount of heat it gets out also with the amount of hours it burns at least eight hours. I would recommend this for anyone who is looking for hours of heat output. At first when I bought it I didn’t quite know if mine hopes will be for filled but now they are happy with it. I would recommend this to anyone as a trusted tester of it I am very pleased of the outcome it rains.!
Vladimir Novik
04/25/2022
Nice company to work with and an even better fireplace for our home
Nice , polite and helpful, when you would call with questions.Fireplace looks nice and throws a decent amount of heat , just a bit of a delay in delivery. Ended up getting it End of January, right before guests arrived. But still only took 3 weeks to get. Thank you Flame Authority !!!
Chelyn Andrea
02/02/2022
Stunning Fireplace
I didn't expect to have this fireplace earlier than the lead time they promised. It looks stunning in my living room and now we are prepared for the upcoming winter season! I am happy with all the updates! Customer service representatives keep on updating me with the process of my order until delivery they are checking it for you! 10 stars for Flame Authority!
sample
09/27/2021
Beautiful
Simply beautifully designed. Very efficient. Looks gorgeous in our mid century modern home in a corner space. Will save us $$$ on electric heat bills and is easy to clean with fireplace glass cleaner.
Hayley Severns
09/03/2021
Great Customer Service
I believe it was David Novak that helped me. Someone ALWAYS answered the phone and located this burner when I couldn't find it anywhere else. It almost seemed too good to be true. But it wasn't. The burner is now nestled in my new outdoor kitchen and am very pleased.
Olivia Pierce
06/29/2021
Thank you for a very smooth transaction. the remote is very useful. It is very easy to install
Jenna
04/13/2021
Cool
My kids really enjoyed the different colors. It gives a good ambiance to our home. Thanks!
