FireRock 3620 Avenue C User manual

FireRock Building Materials
Corporate Mailing Address:
1500 1st Ave N #75
Birmingham, AL 35203
Tel: [phone]
Fax: [phone]
Manufacturing Address:
3620 Avenue C
Fairfield, AL 35064
Tel: [phone]
Fax: [phone]
FIREPLACE
PRODUCT MANUAL
Version: 1.0 Revised: 1/12/2018

2
PURCHASING & SHIPPING
Certified Distributors can purchase FireRock products by submitting a purchase order via email or fax as follows:
EMAIL: orders@firerock.us
FAX: [phone]
When you purchase fireplaces or fireplace parts, there are two options for shipping your product(s):
1. We can schedule and ship materials to you when they are ready
2. You can schedule your own shipping
Our customer service team will work with you to establish your preferred shipping method when your order is placed. For fireplaces and
fireplace parts shipped by FireRock via tractor trailer or mail, you can expect your materials to ship within 3-5 business days.
If the lead time for your specific order happens to fall outside of the ranges above, you will be contacted by Customer Service within 24
hours, so we may provide the most accurate lead time possible.
For customers making their own shipping arrangements, our process is as follows:
• You will be notified by FireRock when the order is ready to be picked up
• Customers must notify the shipping department 24 hours prior to picking up any order - this helps us reduce your wait time by having
your order pulled and waiting
• Call 205-259-5957 or email dispatch@firerock.us to schedule your pickup
• Orders must be picked up no later than 3 days after you are notified that the order is ready. After that time period, FireRock will ship the
order to your location
• There will be no order pickups or deliveries scheduled the 1st business day of each month
Please note: Orders submitted and prepared within the last week of the month may have a targeted ship date of less than 3 days after
ready notification. This allows FireRock maintain inventory levels for the following month and to ensure we can respond to all orders in a
timely fashion.
TECHNICAL SUPPORT
FireRock’s Technical Services Department is devoted to making the relationship between manufacturer and distributor one that is positive
and hassle free. You will enjoy exceptional product support from the well trained Technical Service Specialists who can help with issues
such as installation specifications, product dimensions, and fireplace performance characteristics.
Please contact our Technical Support Department with questions or concerns you may have at 888.876.1025.
BILLING
FireRock invoices have 30 day standard payment terms and should be paid by check and remitted to:
FireRock Products, LLC
1500 1st Ave N, Suite 75
Birmingham, AL 35203
All overdue invoices will be charged a 1.5% monthly interest rate and overdue accounts are placed on hold once invoices are five days past
due. Financial credit may be withdrawn at any time from customer accounts that are consistently placed on hold.
All accounts not granted credit should be prepaid prior to shipment of orders, or there will be a credit card fee.

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FireRock Overview
Indoor Fireplaces......................................................................................5
Installation Methods.................................................................................8
Outdoor Fireplaces..................................................................................9
Outdoor Fire Pits.....................................................................................10
Firebrick and Mortar................................................................................11
Accessories...............................................................................................12
Installation Kits.........................................................................................15
Compatibility Guide..............................................................................16
Clearances to Combustibles...............................................................17
Fireplace Dimensions.............................................................................18
Product Pages (with CAD drawings)
Conventional Fireplace.........................................................................22
Oversized Conventional Fireplace...................................................30
Rumford Fireplace.................................................................................34
See-Through Fireplace.........................................................................42
Vent Free Fireplace..............................................................................50
Vent Free Lite Fireplace.......................................................................58
Outdoor Fireplace Conventional.....................................................66
Outdoor Fireplace Arched................................................................72
B-Vent Installation..................................................................................78
LiteRock Installation.............................................................................80
Round Fire Pit..........................................................................................82
Square Fire Pit.........................................................................................84
FireRock Terms and Conditions.......................................................86
DuraChimney Catalog...........................................................................90
DuraChimney Installation Instructions..........................................102
Outside Air Kit Installation Instructions........................................114
Firebox Installation Instructions........................................................115

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5. ANGLED BACK WALL
FireRock offers a unique option of an angled back wall. This has a more traditional, hand-crafted look
with its symmetrical trapezoidal shape. It also improves heat reflection as the heat bounces off the back
wall and enters the room.
1. 3X STRONGER THAN THE COMPETITION
FireRock fireplaces are 3x stronger than the leading competitor and are less likely to suffer wear and tear or damage
during initial transit.
2. TRUE FINISHED OPENINGS
The dimensions after installing the firebrick is the true finished opening size. Knowing this,
we created a fireplace with true finished opening sizes, so when you order a 42” fireplace
from FireRock, the opening size when completely installed will be exactly 42”. This makes
planning much easier for architects, interior designers, builders and installers.
3. IMPROVED DRAW & REDUCED SMOKE SPILLAGE
FireRock improved two engineering elements of the common masonry fireplace – a curved radius lintel
combined with a larger, 15” flue. Together these improve draw and minimize the risk of smoke spillage.
4. PATENTED ONE-PIECE CHIMNEY SYSTEM
FireRock’s chimney is a patented, one-piece system with built-in nesting feature on each
chimney block to help ensure the blocks stack up straight and are secure for easier installation.
TOP 5 REASONS TO CHOOSE
FIREROCK FIREPLACES

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CONVENTIONAL
• Available Sizes: 30”, 36”, 42”, 48”
• Approved for indoor and outdoor use
• Design: Traditional-style firebox with angled back wall for better heat reflection
• Options: A more modern, straight back wall option is available (California Conventional)
• Chimney: Accommodates FireRock masonry or approved metal chimney system (UL 103)
• Compliances: UL 127, ANSI Z21.60, wind load, seismic testing, ICC report issued
• Applications: Models 30", 36" and 42" can be installed using LiteRock method
• Clearance to Combustibles: 1" around firebox unit and smoke chamber
• Damper options: cast iron, top seal, anchor plate with damper
OVERSIZED CONVENTIONAL
• Available Sizes: 60” and 72”
• Approved for indoor and outdoor use
• Design: Oversized version of the Conventional fireplace with straight back
wall only
• Chimney: Double chimney required; Accommodates FireRock masonry or
approved metal chimney system (UL 103)
• Compliances: UL 127, ANSI Z21.60
• Clearance to Combustibles: 1" around firebox unit and smoke chamber
• Damper options: cast iron (60” only), anchor plate with damper, top-seal damper (72” requires 2 top-seal dampers)
NOTE: All fireplaces should be installed according to ICC Report and Installation Manual instructions, which supersede this
document. Always be sure to check and follow local building codes.
INDOOR FIREPLACES
FireRock manufactures the most advanced pre-engineered masonry fireplace system available
and costs 50-70% less than traditionally constructed site-built fireplaces. Using patented
engineering, experts designed our fireplaces to draw efficiently and maximize heat reflection.
Leading third party agencies test and list our fireplaces under applicable standards, such as UL
127. We’ve done all the work to provide the best masonry fireplace solution: high performing,
safe, and affordable. Plus it comes with a 20 year warranty.

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SEE-THROUGH
• Available Sizes: 30”, 36”, 42”, 48”
• Approved for indoor and outdoor use
• Vent Free version available in same sizes
• Design: Provides a fireplace to be in two rooms (shown) using only one flue
• Options: Firebox side walls can be angled in or straight
• Chimney: Accommodates FireRock masonry or approved metal chimney system (UL 103)
• Compliances: UL 127 and ANSI Z21.60 listed
• Applications: Models 30", 36" and 42" can be installed using LiteRock method
• Requirements: To ensure a UL 127 compliant installation and to reduce the risk of smoke
spillage, a set of glass or ceramic fireplace enclosure doors MUST be installed on one or both sides of the
fireplace. FireRock does not sell the doors required for this unit.
• Clearance to Combustibles: 1" around firebox unit and smoke chamber
• Damper options: Top-seal or anchor plate with damper
NOTE: All fireplaces should be installed according to ICC Report and Installation Manual instructions, which supersede this
document. Always be sure to check and follow local building codes.
INDOOR FIREPLACES
RUMFORD
• Available Sizes: 30”, 36”, 42”, 48”
• Approved for indoor and outdoor use
• Design: Taller opening with straight back wall – great for homes with high ceilings
• Chimney: Accommodates FireRock masonry or approved metal chimney system (UL 103)
• Compliances: UL 127, ANSI Z21.60, wind load, seismic testing, ICC report issued
• Applications: Models 30”, 36” and 42” can be installed using LiteRock method
• Clearance to Combustibles: 1” around firebox unit and smoke chamber
• Damper Options: Cast iron, top seal, anchor plate with damper

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VENT-FREE
• Available Sizes: 30”, 36”, 42”, 48”
• Approved for indoor and outdoor use
• Design: Allows for a true masonry fireplace without a chimney. Angled or straight back
wall options available
• Compliances: ANSI Z21.91, seismic testing, ICC report issued
• Applications: Can be installed directly on a wooden or other combustible floor – perfect for
remodeling projects; check local building codes for restrictions, specifically in bedrooms
• Requirements: Use only with unvented decorative gas logs that comply with ANSI Z21.11.2 with maximum heat
output of 40,000 BTUs
• Clearance to Combustibles: 0” around sides and back; 3.5” on top
VENT-FREE LITE
• Lightweight version of the vent-free due to shallower depth (24”) and specialized
component design
• Available Sizes: 30”, 36”, 42”, 48”
• Approved for indoor and outdoor use
• Design: Allows for a true masonry fireplace without a chimney; straight back wall only
• Compliances: ANSI Z21.91
• Applications: Can be installed directly on a wooden or other combustible floor – perfect for
remodeling projects; check local building codes for restrictions, specifically in bedrooms
• Requirements: Use only with unvented decorative gas logs that comply with ANSI Z21.11.2
• Clearance to Combustibles: 0" around sides and back; 3.5" on top
SEE-THROUGH VENT FREE
• Ventless version of the See-Through fireplace kit
• Approved for indoor and outdoor use
• Available Sizes: 30”, 36”, 42”, 48”
• Design: Allows for a true masonry fireplace without a chimney in two rooms
• Compliances: ANSI Z21.91, seismic testing
• Applications: Can be installed directly on a wooden or other combustible floor – perfect for
remodeling projects; check local building codes for restrictions, specifically in bedrooms
• Requirements: Use only with unvented decorative gas logs that comply with ANSI Z21.11.2
• Clearance to Combustibles: 0” around sides and back; 3.5” on top
NOTE: All fireplaces should be installed according to ICC Report and Installation Manual instructions, which supersede this
document. Always be sure to check and follow local building codes.
TOP PLATE
SEE-THROUGH FIREBOX SIDE
FIREPLACE
SIZE
CHIMNEY PLAN
FIREBOX PLAN ISOMETRIC
FRONT ELEVATION
SECTION A-A
SECTION A-A - ALT FRONT ELEVATION - ALT ISOMETRIC - ALT
FIREBOX PLAN - ALT.
INDOOR FIREPLACES

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FOUNDATION & INSTALL APPLICATIONS
Different foundations call for different installation applications. There are 4 common types that are described below.
1. Concrete Slab – This non-combustible base is approved for all FireRock models.
2. Concrete Pad Supported by Masonry (CMU) Tower – Typically used when fireplace is placed over basement or
crawl space. It is best made from a 6” concrete slab poured on top of corrugated metal suspended over concrete
block (erected steel may be substituted). Concrete pad must be supported by a full masonry tower to withstand the
weight of the firebox and flue system. This type of foundation is approved for all FireRock models
3. Combustible Sub floor – A combustible sub floor (i.e. wooden sub floor) has restricted applications. See detail
below for FireRock B-Vent System installation technique. Vent-Free models also allowable.
4. Limited Load-Bearing Capacity – Also has restricted applications. See below for details on FireRock’s LiteRock
installation method that allows one of our conventional fireplaces to be installed directly on a combustible floor
using an 8” riser and metal flue.
B-VENT
Our B-Vent fireplace is a higher BTU, vented, gas-only model. It offers an automated safety shutoff valve, ensuring your
fire does not burn too long or too hot. This model requires an accessory kit and gas log set specifically sized for the
fireplace (FireRock stocks both) as well as a special 10” chimney pipe.
• Available Sizes: 30”, 36”, 42”, 48”
• Design: Allows for a true masonry, gas-only fireplace
• Compliances: ANSI Z21.50, wind load, seismic testing, ICC report issues
• Applications: Can be installed directly on a wooden or other combustible floor without a riser kit.
Check local building code for restrictions, specifically in bedrooms
• Requirements: Use only with gas logs that comply with ANSI Z21.60
• Clearance to Combustibles: 0” to floor, 1” to sides and back of firebox and smoke chamber
LITEROCK
Our LiteRock system is a lightweight fireplace installation method that can be installed directly on a combustible floor,
typically without additional support. Note: this is an installation method, not a unique firebox. The firebox itself is
exactly the same as the one used in our standard installation method only now paired with an 8” riser and
lightweight metal flue system.
• Can be used with Conventional, Rumford and See-Through models sizes 30”, 36” and 42” only
• Allows for a wood-burning fireplace on a combustible floor
• Compliances: UL 127, ANSI Z21.60, wind load, seismic testing, ICC report issues
• Chimney: UL 103 approved metal chimney only
• Applications: Great for 2nd floor fireplace application or over basement
• Clearance to Combustibles: 1” around firebox unit/smoke chamber; riser can sit directly on combustible floor
FIREPLACE
INSTALLATION METHODS

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OUTDOOR FIREPLACES
• Available Sizes: 30”, 36”, 42”
• Approved for outdoor use only
• Design: Traditional-style firebox with a straight back wall and no radius lintel
• Options: Classic Tuscan-styled Arched Front and Conventional
• Chimney: Accommodates FireRock masonry chimney system – 2-3 feet included in fireplace kit; both firebox and
chimney system components deliver on a single pallet
• Compliances: UL 127
• Requirements: This product is NOT designed to be built into a wood framed structure. Rather, it is designed to be
freestanding. In the event that additional dimension is required, build out with concrete masonry units (CMUs) or
metal framing material.
OUTDOOR FIREPLACES
A fireplace is the perfect centerpiece to incorporate when designing an outdoor space that
features comfort and style. FireRock offers an all-in-one outdoor fireplace kit that is easily
assembled and affordable (in sizes 30”, 36” and 42”).
FireRock’s outdoor units are designed to be freestanding, meaning they cannot be built into a
wood framed structure or go through a roof.
CONVENTIONAL ARCHED FRONT

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ROUND FIRE PIT
• Available Sizes: 44”
• Design: Modular design with no single component over 60 lbs.
• Options: Riser kit(s) available for increased height - one riser provides an additional 6”
SQUARE FIRE PIT
• Available Sizes: 36”, 48”, 60”, 72”
• Design: Modular design with no single component over 60 lbs.
• Options: Extension blocks available to add length and width for custom sizes.
OUTDOOR FIRE PITS
For that “around the campfire” experience choose a FireRock Fire Pit. Our round and square
Fire Pits are a low maintenance focal point that can enhance any outdoor living area. This
product may be installed as a wood burning installation or may be installed with a gas burner.
Riser blocks are available to customize the height of the fire area for your outdoor space. The
masonic stone work of our Fire Pit option gives your fire feature long lasting quality, while
simultaneously ensuring safety. Like all FireRock products, the Round and Square Fire Pit can
be veneered with the masonry material of your choice. With the right design, you can even
outfit the structure with a grilling grate.

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Running Bond Stacked Bond Basket WeaveFull Herringbone Split Herringbone
FIREROCK ADHESIVE MORTAR
FireRock Adhesive Mortar must be used to install the firebox and FireRock masonry chimney in order for the
FireRock warranty to be valid. It may also be used to install the firebrick, though substitutions are allowed.
Substitutions in the firebox will result in a non-compliant unit and will invalidate the FireRock warranty.
• Weight per bag: 25 lbs
• Bags per pallet: 96 bags
• The appropriate number of bags for each fireplace are included with the installation kit (See page 15)
• Mortar for masonry chimney block must be purchased separately. One bag of mortar is needed for every 6
masonry chimney pieces.
MIXING & USAGE:
• Clean all loose material from surfaces to be mortared
• Mix mortar with water at a low speed to avoid entraining excess air, mix until trowelable consistency
• Apply sucient amount to surface to ensure 100% coverage is obtained (Joint thickness 1/8” - 3/8” suggested)
• Must use FireRock Adhesive Mortar to erect all FireRock firebox and chimney components
• After setting of a component, the mortar must be able to be seen at the surface of the joint and subsequently
smoothed
• Do not apply if temperatures are below 40 degrees F
• Under normal conditions assembly is cured in 24 to 48 hours
FIREBRICK COLORS & SIZES
Firebrick used must comply with ASTM standards C1261 and C27 and meet or exceed the requirements of local,
national and international building codes regarding fireplace and chimney construction and the National Fire
Protection Association NFPA-211. A compliant firebrick lining is a minimum of 1 ¼” or 2 ½”. Although you can use
either firebrick thickness to line the sides, back and floor of the firebox, FireRock recommends using the 2 ½” thick
firebrick to line the floor. Note: True opening size is achieved using 1 ¼” brick on sides. For your convenience,
FireRock stocks firebrick in 3 sizes and two colors to accommodate the most popular firebrick patterns.
• Colors: Red and Bu
• Full Firebrick dimensions: 4” (W) x 9” (L) x 2 ½” (D)
• Split Firebrick dimensions: 4” (W) x 9” (L) x 1 ¼” (D)
• Soaps (Bu color only): 2 ¼” (W) x 9” (L) x 1 ¼” (D)
FIREBRICK PATTERNS
FIREBRICK & MORTAR

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CHIMNEY BLOCK
• Overall Width: 22” x 22”
• Overall Height: 6”
• Weight: 75 lbs
• UL 127 Compliant
• 0” Clearance unless oset, then 1” clearance above oset
• FireRock’s masonry chimney is the industry’s largest with a 15” interior diameter
• To increase the solid block chimney’s strength even more, insert rebar and mortar into the “hurricane” holes
• NOTE: Solid Block Chimney is required if your plans call for a Bricking Flange. Refer to installation manual and
local building codes for minimum and maximum height requirements.
OFFSET BLOCK
• Overall Width: 24.5” x 22”
• Overall Height: 4”
• Weight: 60 lbs
• Vertical Oset: 4”
• Horizontal Oset: 2 5/8”
• Max horizontal oset = 40”
• Oset Angle: 30
• 1” Clearance (vertical o-set) after oset block is used
• At a maximum, every 5th oset block must be supported by noncombustible materials, such as
a concrete block wall
BRICK FLANGE
• Overall Width: 32” x 32”
• Overall Height: 4”
• Weight: 170 lbs
• Vertical Brick Support: 20 ft maximum
• Installed in the chimney stack approx. 12” below the low side of the roof line inside the attic space
• IMPORTANT: Please consult local building codes for specifics regarding masonry above the roof line
FIREPLACE ACCESSORIES
ISOMETRIC
PLAN
SIDE ELEVATION
CHIMNEY BASE CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC
OFF-SET CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC
SMOKE CHAMBER FRONT AND BACK
PLAN
FRONT ELEVATION
SIDE ELEVATION ISOMETRIC
UNIVERSAL SMOKE CHAMBER SIDES
ISOMETRIC
FRONT ELEVATION
SIDE ELEVATION
PLAN
THROAT RIGHT SIDE
PLAN
SIDE ELEVATION ISOMETRIC
BACK ELEVATION
(ONLY IF REQUIRED BY INSTALLATION)
ISOMETRIC
PLAN
SIDE ELEVATION
BRICKING FLANGE
(ONLY IF REQUIRED BY INSTALLATION)
CHIMNEY CAP
SIDE ELEVATION PLAN ISOMETRIC
(OPTIONAL)
9 10 11
12
18
1613
17
ISOMETRIC
PLAN
SIDE ELEVATION
CHIMNEY BASE CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC
OFF-SET CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC
SMOKE CHAMBER FRONT AND BACK
PLAN
FRONT ELEVATION
SIDE ELEVATION ISOMETRIC
UNIVERSAL SMOKE CHAMBER SIDES
ISOMETRIC
FRONT ELEVATION
SIDE ELEVATION
PLAN
THROAT RIGHT SIDE
PLAN
SIDE ELEVATION ISOMETRIC
BACK ELEVATION
(ONLY IF REQUIRED BY INSTALLATION)
ISOMETRIC
PLAN
SIDE ELEVATION
BRICKING FLANGE
(ONLY IF REQUIRED BY INSTALLATION)
CHIMNEY CAP
SIDE ELEVATION PLAN ISOMETRIC
(OPTIONAL)
9 10 11
12
18
1613
17
ISOMETRIC
PLAN
SIDE ELEVATION
CHIMNEY BASE CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC
OFF-SET CHIMNEY BLOCK
SIDE ELEVATION PLAN ISOMETRIC
SMOKE CHAMBER FRONT AND BACK
PLAN
FRONT ELEVATION
SIDE ELEVATION ISOMETRIC
UNIVERSAL SMOKE CHAMBER SIDES
ISOMETRIC
FRONT ELEVATION
SIDE ELEVATION
PLAN
THROAT RIGHT SIDE
PLAN
SIDE ELEVATION ISOMETRIC
BACK ELEVATION
(ONLY IF REQUIRED BY INSTALLATION)
ISOMETRIC
PLAN
SIDE ELEVATION
BRICKING FLANGE
(ONLY IF REQUIRED BY INSTALLATION)
CHIMNEY CAP
SIDE ELEVATION PLAN ISOMETRIC
(OPTIONAL)
9 10 11
12
18
1613
17
o

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Arrows
Indicate
Air Flow
HEIGHT EXTENSION KIT
• Can be used to increase the firebox’s finished opening to 8 ⅝”
• Perfect for designs that call for an arched opening that would normally reduce
the open area of the firebox
• Three-piece unit made up of two side-block and one back-block that sets on the baseplate,
as shown
• This accessory may not be used with LiteRock or See-Through models
• Treat as another course of block at installation
OUTSIDE AIR KIT
• FireRock recommends the Air-A-Lator Mason’s Choice outside air intake regulator for all
indoor fireplace installations
• Helps reduce back draft smoking caused by negative pressure in the home
• Outside air kits should be installed and used in accordance with requirements of the
standard for fireplaces under national code NFPA 211
• FireRock recommends installing the outside air kit above the first course of firebrick near the
front of the fireplace
• IMPORTANT: Please consult local building codes if a wood-burning fireplace REQUIRES an
outside air kit. Additional make-up air may be required depending on installation used,
exhaust systems and location of fireplace in the home.
METAL CHIMNEY SYSTEM
• All FireRock fireplace units are designed to accommodate UL 103 listed metal chimney systems for
a lighter weight installation
• FireRock distributes M&G Duravent, DuraChimney II UL 103 (air-cooled applications). The
double-wall, air-cooled design allows the chimney to expand both radially and lengthwise under
high temperatures.
• Chimney height is subject to job site specifications.
• Clearance to Combustibles: 2" around metal chimney (specific to M&G Duravent)
• FireRock oers anchor plates firestops, stabilizers, storm collars and chimney caps that act as
spark arrestors
• Use 14" diameter pipe for all units with exception to 30" fireplace (12" or 14” is allowable, however
14” always recommended)
LOG LIGHTERS
• Flush mount and top mount options available
• Flush mount log lighters are installed before firebrick is placed
• Top mount log lighters are installed after firebrick is installed
FIREPLACE ACCESSORIES

14
CHIMNEY POTS
FireRock offers some of the highest quality and reasonably priced chimney pots on the market today.
Compatible with all FireRock products, these chimney pots can even improve the overall draw of a fireplace,
leading to a higher performing fireplace while protecting the chimney from the elements and extreme
weather.
FIREPLACE ACCESSORIES
EUROPEAN COPPER & CHIMNEY CLASSICS BY JACK
ARNOLD
Round, square or octagonal, the European Copper line of copper chimney pots
offers numerous design combinations for both traditional and more contemporary
homes. Available in five styles, seven sizes and two unique finishes (Freedom Gray
and Copper), each chimney pot is lined with stainless steel.
Adapters are available for both the King and the Bishop models of Jack Arnold/
European Classics chimney pots. These adapters can be used to fit the pots directly
onto the DuraChimney II pipe. Adapters are not absolutely necessary, as these
pots, along with all other Jack Arnold models, may also be attached to the chase
with L brackets.
CLAY CHIMNEY POTS BY SUPERIOR CLAY
With more than 60 standard styles to choose from, and a variety of ways to customize your chimney pot, you
can find the look that’s just right for your home with Superior Clay’s line of clay chimney pots.
CHIMNEY CAPS
FireRock’s Galvanized Steel Chimney Cap is available in a single flue option, compatible with our masonry
chimney flue only. The Stainless Steel Metal Chimney Cap by Duravent is available for use with metal flue pipe.
DAMPERS
FireRock offers 3 types of dampers: Cast Iron, Top-Seal and Anchor Plate with Damper.
• Cast Iron Dampers can be used for all fireboxes with exception to our 72” conventional (requires
2 Top-Seal Dampers) or our See-Through models, regardless if using masonry or metal flue.
• Top Seal Dampers are compatible with all fireboxes that use a masonry chimney system.
• Anchor Plate with Dampers are compatible with all fireboxes that use a metal chimney system.
• All Vent Free and Outdoor FireRock models do not require dampers

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FIREROCK INSTALL KITS
MODEL SIZES MORTAR FULL BRICK SPLIT BRICK DAMPER SIZE WEIGHT
CONVENTIONAL/CA 30” 10 40 120 24” 1100 lbs
CONVENTIONAL/CA 36” 11 40 120 30” 1100 lbs
CONVENTIONAL/CA 42” 11 40 120 36” 1100 lbs
CONVENTIONAL/CA 48” 12 40 120 42” 1100 lbs
CONVENTIONAL* 60” 14 60 180 54” 1200 lbs
CONVENTIONAL 72” 16 80 220 (2) TOP SEAL 1400 lbs
OUTDOOR 30” 7 30 90 N/A 800 lbs
OUTDOOR 36” 8 35 95 N/A 850 lbs
OUTDOOR 42” 11 40 120 N/A 950 lbs
RUMFORD 30” 10 40 160 24” 1200 lbs
RUMFORD 36” 11 40 160 30” 1200 lbs
RUMFORD 42” 12 40 160 36” 1200 lbs
RUMFORD 48” 12 40 160 42” 1200 lbs
VENT FREE ALL 6 40 120 N/A 950 lbs
VENT FREE LITE ALL 6 40 120 N/A 950 lbs
SEE THROUGH* ALL 10 40 70 TOP SEAL 900 lbs
SEE THROUGH VENT FREE ALL 6 40 70 N/A 960 lbs
For added convenience, FireRock offers installation kits for each indoor and outdoor product. Standard kit
items include the following:
• # of Bags of FireRock Adhesive Mortar needed to complete your installation of firebox and firebrick
• # of Firebricks needed for firebox in specified design and color
• Cast iron throat damper in the correct size needed for firebox (indoor models only) Note: Top seal damper
(masonry chimney) & anchor plate with damper (metal chimney) also available by request
• Angled steel bar needed to create lintel component (sizes 30”-48” only)
* Note: Additional mortar needs to be purchased with masonry flue
FIREPLACE
INSTALLATION KITS
* If using metal pipe, must request anchor plate with damper in lieu of top seal

16
CONVENTIONAL RUMFORD SEE THROUGH VENT FREE B-VENT
INDOOR √ √ √ √ √
OUTDOOR √ √ √ √
COMMERCIAL √ √ √ √ √
RESIDENTIAL √ √ √ √ √
CUSTOM FINISH √ √ √ √ √
COMBUSTIBLE
FLOOR INSTALLATION
√
(LITEROCK RISER UP TO 42”)
√
(LITEROCK RISER UP TO 42”)
√
(LITEROCK RISER UP TO 42”) √ √
MASONRY
FLOOR INSTALLATION √ √ √ √ √
FUEL TYPE: WOOD √ √ √
FUEL TYPE: GAS √ √ √ √ √
MASONRY FLUE √ √ √
METAL FLUE √ √ √ √
SIZE CONVENTIONAL RUMFORD SEE THROUGH VENT FREE B-VENT LITEROCK
INSTALL OUTDOOR
30” √ √ √ √ √ √ √
36” √ √ √ √ √ √ √
42” √ √ √ √ √ √ √
48” √ √ √ √ √
60” √
72” √
FIREPLACE
COMPATIBILITY GUIDE
FIREROCK MINIMUM CLEARANCE TO COMBUSTIBLES
MODEL OPENING TO
SIDEWALL (INCHES)
OPENING TO
COMBUSTIBLE TRIM
(INCHES)
OPENING TO MAN-
TLE WITH 8” DEPTH
(INCHES)
NONCOMBUSTIBLE
HEARTH EXTENSION
(INCHES)
FIREBOX & SMOKE
CHAMBER TO
COMBUSTIBLES OR
FRAMING (INCHES)
SMOKE CHAMBER TO
FRONT WALL & SMOKE
CHAMBER TOP TO WOOD
FRAMING (INCHES)
FireRock Conventional
30, 36, 42, 48 28” 12” 16” 24” in front, 8” each side of opening 1” 1”
FireRock See-Through
30, 36, 42, 48 28” 12” 16” 24” in front, 8” each side of opening 1” 1”
FireRock B-Vent
30, 36, 42, 48 28” 12” 16” 20” in front, 8” each side of opening 1” 1”
FireRock Lite-Rock
30, 36, 42 28” 12” 16”
(Account for 8” riser)
24” in front, 8” each
side of opening 1” 1”
FireRock Vent-Free
30, 36, 42, 48 6” 12” 12” 20” in front, 8” each side of opening 0” 0”
FireRock Rumford
30, 36, 42, 48 28” 12” 22” 24” in front, 8” each side of opening 1” 1”

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FIREROCK MINIMUM CLEARANCE TO COMBUSTIBLES
MODEL OPENING TO
SIDEWALL (INCHES)
OPENING TO
COMBUSTIBLE TRIM
(INCHES)
OPENING TO MAN-
TLE WITH 8” DEPTH
(INCHES)
NONCOMBUSTIBLE
HEARTH EXTENSION
(INCHES)
FIREBOX & SMOKE
CHAMBER TO
COMBUSTIBLES OR
FRAMING (INCHES)
SMOKE CHAMBER TO
FRONT WALL & SMOKE
CHAMBER TOP TO WOOD
FRAMING (INCHES)
FireRock Conventional
30, 36, 42, 48 28” 12” 16” 24” in front, 8” each side of opening 1” 1”
FireRock See-Through
30, 36, 42, 48 28” 12” 16” 24” in front, 8” each side of opening 1” 1”
FireRock B-Vent
30, 36, 42, 48 28” 12” 16” 20” in front, 8” each side of opening 1” 1”
FireRock Lite-Rock
30, 36, 42 28” 12” 16”
(Account for 8” riser)
24” in front, 8” each
side of opening 1” 1”
FireRock Vent-Free
30, 36, 42, 48 6” 12” 12” 20” in front, 8” each side of opening 0” 0”
FireRock Rumford
30, 36, 42, 48 28” 12” 22” 24” in front, 8” each side of opening 1” 1”
*The 60” and 72” require extra floor protection in addition to the 20” full depth hearth extension listed. The amount of additional floor protection is dependent
upon the opening height of the firebox, and must be constructed of a non combustible material with a minimum R-value of 0.30. For our standard sized box an
additional 16” beyond the hearth is required, for 1 height extension kit 40” is required, and for 2 height extension kits 64” are required.
CLEARANCES TO
COMBUSTIBLES
Outside Air Kit Installation
Install in accordance to the NFPA 211 guide lines. 2015 IRC, Section R1006.3 Clearance.
Unlisted combustion air ducts should be installed with a minimum 1-inch (25-millimeter) clearance to combustibles for all parts of the
duct within 5 feet (1524 millimeters) of the duct outlet.
Metal Pipe
2” Clearance surround
Masonry Flue
If flue straight up: 0” clearances
required. If offset: 1” clearance
is required.
Please refer to the following chart for framing clearances.
For any foundational requirements, please see the installation manual or contact 888-876-1025.

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SIZE MODEL
A B C D E F G H
WEIGHT
OVERALL
WIDTH
OVERALL
DEPTH
OVERALL
HEIGHT
FIREBOX
HEIGHT
SMOKE
CHAMBER
HEIGHT
OPENING
WIDTH
OPENING
HEIGHT
FIREBOX
DEPTH
30” CONVENTIONAL/CA 38” 28.5” 59.875” 37.5” 22.375” 32.5” 33.75” 22.5” 1800 lbs
36” CONVENTIONAL/CA 44” 28.5” 69” 37.5” 31.5” 38.5” 33.75” 22.5” 2150 lbs
42” CONVENTIONAL/CA 50” 28.5” 69” 37.5” 31.5” 44.5” 33.75” 22.5” 2410 lbs
48” CONVENTIONAL/CA 56” 28.5” 78.25” 37.5” 40.75” 50.5” 33.75” 22.5” 2900 lbs
60” CONVENTIONAL 68” 28.5” 69” 37.5” 31.5” 62.5” 33.75” 22.5” 3000 lbs
72” CONVENTIONAL 80” 28.5” 69” 37.5” 31.5” 74.5” 33.75” 22.5” 3200 lbs
30” RUMFORD 38” 28.5” 59.875” 37.5” 22.375” 32.5” 33.75” 22.5” 1700 lbs
36” RUMFORD 44” 28.5” 77.625” 46.125” 31.5” 38.5” 42.375” 22.5” 2350 lbs
42” RUMFORD 50” 28.5” 77.625” 46.125” 31.5” 44.5” 42.375” 22.5” 2650 lbs
48” RUMFORD 56” 28.5” 95.5” 54.75” 40.75” 50.5” 51” 22.5” 3400 lbs
30” SEE-THROUGH 38” 28.5” 59.875” 37.5” 22.375” 32.5” 34.5” 28.5” 1600 lbs
36” SEE-THROUGH 44” 28.5” 69” 37.5” 31.5” 38.5” 34.5” 28.5” 1800 lbs
42” SEE-THROUGH 50” 28.5” 69” 37.5” 31.5” 44.5” 34.5” 28.5” 2050 lbs
48” SEE-THROUGH 56” 28.5” 78.25” 37.5” 40.75” 50.5” 34.5” 28.5” 2350 lbs
30” VENT FREE
/ST VENT FREE 38” 28.5” 40.5” 40.5” N/A 32.5” 33” 22.5” 1350 lbs
36” VENT FREE
/ST VENT FREE 44” 28.5” 40.5” 40.5” N/A 38.5” 33” 22.5” 1500 lbs
42” VENT FREE
/ST VENT FREE 50” 28.5” 40.5” 40.5” N/A 44.5” 33” 22.5” 1650 lbs
48” VENT FREE
/ST VENT FREE 56” 28.5” 40.5” 40.5” N/A 50.5” 33” 22.5” 1800 lbs
30” VENT FREE LITE 38” 24” 38” 38” N/A 32.5” 32” 19” 800 lbs
36” VENT FREE LITE 44” 24” 38” 38” N/A 38.5” 32” 19” 850 lbs
42” VENT FREE LITE 50” 24” 38” 38” N/A 44.5” 32” 19” 925 lbs
48” VENT FREE LITE 56” 24” 38” 38” N/A 50.5” 32” 19” 1000 lbs
30” OUTDOOR 38” 28.5” 75.25” 28.875” 22.375” 32.5” 25.625” 22.5” 1550 lbs
36” OUTDOOR 44” 28.5” 83.875” 37.5” 22.375” 38.5” 33.75” 22.5” 1850 lbs
42” OUTDOOR 50” 28.5” 105” 37.5” 31.5” 44.5” 33.75” 22.5” 2400 lbs
30” ARCHED OUTDOOR 38” 28.5” 83.875” 37.5” 22.375” 32.5” 29.75” 22.5” 1650 lbs
36” ARCHED OUTDOOR 44” 28.5” 83.875” 37.5” 22.375” 38.5” 29.75” 22.5” 1950 lbs
42” ARCHED OUTDOOR 50” 28.5” 105” 37.5” 31.5” 44.5” 29.75” 22.5” 2350 lbs
FIREPLACE DIMENSIONS
• Measurements exclude firebrick
• LiteRock risers (8 in height) allow fireboxes to be installed directly on combustible floor (metal pipe only) and can be used on
the following units: 30” 36” 42” Conventional, 30” 36” 42” See-Through, 30” 36” 42” Rumford. See above for dimensions.
• B-Vent chimney systems require gas log set sized to the firebox and uses the Conventional model up to 48”. See above for dimensions.

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FIREPLACE DIMENSIONS
Correlate the framing dimensions on the previous page with the diagram above.