Hearth and Home Technologies Essential Safety Guidelines for Compliance with 10.0.052 in Gas Log Hearth Kits

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1 Listing and Code Approvals

A. Appliance Certification

The Gas Log Hearth Kits have been tested and listed in the U.S. in accordance with ANSI Z21.84‑2003 (Gas Log Set). They have been listed by OMNI Test Labs for installation and operation in the United States and Canada as described in these Installation and Operating Instructions. All components are UL, OMNI or CSA safety certified.

Check with your local building code agency prior to installing this appliance to ensure compliance with local codes, including the need for permits and follow-up inspections. In the absence of local codes, comply with the National Fuel Gas Code, ANSI Z223.1-Latest Edition in the U.S. If any assistance is required during installation, please contact your local dealer or call the Technical Services Department at 1-888-427-3973 or 1-800-927-6841.

B. Table 1

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to the owner’s information manual provided with this appliance. For assistance or additional information consult a qualified installer, service agency or the gas supplier.

WARNING

Fire Risk

Exhaust Fumes Risk

Do NOT use this appliance as a “vent-free heater.

The flue must be permanently open. Refer to Table 1.

Product

 

MHK18NG

MHK24NG

STMHK18NG

STMHK24NG

 

 

 

 

 

 

Inlet BTU / KW /HR

Nat.

74,000 / 21.7

84,000 / 24.6

65,000 / 19

75,000 / 22

Max. Inlet Pressure

Nat.

10.0 / .052

10 / .052

10.0 / .052

10.0 / .052

IN. WC / KPa

 

 

 

 

 

Min. Inlet Pressure IN.

Nat.

3.5 / .018

3.5 / .018

3.5 / .018

3.5 / .018

WC / KPa

 

 

 

 

 

Orifice Size

Nat.

(#26) .147

(#20) .161

(#30) .128

(#28) .141

In. / mm

 

 

 

 

 

Minimum Fireplace

Front

28 / 71.1

34 / 86.4

28 / 71.1

34 / 86.4

Rear

16 / 40.6

18 / 45.7

-

-

Opening Size

Depth

14 / 35.6

16 / 40.6

16 / 40.6

16 / 40.6

In. / cm

Height

16 / 40.6

18 / 45.7

18 / 45.7

18 / 45.7

 

Min. Vent Opening in

 

39 / 251.6

48 / 309.7

39 / 251.6

48 / 309.7

Square In. / cm

 

 

 

 

 

 

 

 

 

 

 

Hearth & Home Technologies • Fireside Burner/Hearth Kits • 4004-304 Rev C • 08/2010

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Contents What to do if you smell gas Commonwealth of MassachusettsHomeowner Reference Information Listing Label Information/LocationTable of Contents Listing and Code Approvals Appliance CertificationGetting Started Size of FireboxNegative Pressure Tools and Supplies NeededComponents of the Gas Hearth Kit Shock Risk Fire RiskGas Supply Connection Appliance PreparationConvert to Left Side Gas Piping Fire Risk Explosion Risk Asphyxiation Risk Gas PressureHigh Altitude Derate Installation Instructions Install the Damper StopInstall the Burner/Pan Assembly Install the GrateAdjust the Burner Flame Install the LogsInspect the Venting System Operating Instructions Lighting InstructionsFire Risk High Temperatures Important SafeguardsGlass Doors Cleaning Your Appliance TroubleshootingMaintaining and Servicing the Appliance Servicing Your Appliance Annual InspectionMHK Hearth Kit Assembly Replacement PartsReference Materials Description of Part QtySTMHK-NG STMHK18NG STMHK24NG Page Page Dido C O a T R D

MHK18NG, STMHK24NG, MTMHK18NG, MHK24NG specifications

Hearth and Home Technologies has consistently delivered innovative heating solutions, and their line of gas fireplaces is no exception. The MHK24NG, MTMHK18NG, STMHK24NG, and MHK18NG models exemplify the brand's commitment to quality, efficiency, and style.

The MHK24NG is a powerful natural gas fireplace that boasts a heat output of up to 29,000 BTUs. Its clean lines and contemporary design make it a perfect addition to modern spaces, while the impressive heat output ensures warmth in larger rooms. An included hand-held remote control adds convenience, allowing users to adjust settings without leaving their seats.

Similarly, the MTMHK18NG offers versatility with a slightly smaller footprint, providing up to 20,000 BTUs. Designed for easy installation, this model features an adjustable flame and a variety of decorative media options, allowing homeowners to customize the look of their fireplace. The MTMHK18NG's compact size makes it an excellent choice for smaller rooms or apartments, where space is at a premium.

The STMHK24NG combines traditional aesthetics with modern technology. It provides a remarkable 32,000 BTUs and includes advanced safety features, such as a built-in oxygen depletion sensor, which automatically shuts off the gas supply if it detects low oxygen levels. This model also provides an array of interchangeable front options, ensuring that it can complement any home decor or personal style.

The MHK18NG rounds out the lineup with its unique balance of efficiency and design. With a heat output of 18,000 BTUs, this fireplace is ideal for those seeking a cozy atmosphere without excessive energy consumption. It is equipped with an easy-to-use remote control and features such as adjustable flame height and temperature control, making it a user-friendly option for all home styles.

All four models are designed with energy efficiency in mind, meeting rigorous Environmental Protection Agency standards. They contribute to reduced energy consumption while providing ample warmth. The use of advanced gas technology in these fireplaces ensures consistent performance and reliable operation throughout their lifespan.

In summary, Hearth and Home Technologies’ MHK24NG, MTMHK18NG, STMHK24NG, and MHK18NG gas fireplaces showcase the perfect blend of style, technology, and performance. Whether enhancing the comfort of a contemporary home or adding warmth to a more traditional space, these models offer a range of features designed to meet diverse needs and preferences. With safety and efficiency at the forefront, these gas fireplaces are a superior choice for anyone looking to enhance their living space with both aesthetics and functionality.