Hearth and Home Technologies MTMHK18NG, STMHK24NG installation instructions Table of Contents

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Table of Contents

1 Listing and Code Approvals

A. Appliance Certification. . . . . . . . . . . . . 4 B. Table 1. . . . . . . . . . . . . . . . . . . 4

2Getting Started

A.Size of Firebox. . . . . . . . . . . . . . . . 5

B.Negative Pressure. . . . . . . . . . . . . . . 5

C.Tools and Supplies Needed. . . . . . . . . . . 5

D.Inspect the Appliance and Components . . . . . . 5

E.Components of the Gas Hearth Kit . . . . . . . . 6

3Appliance Preparation

A.Gas Supply Connection. . . . . . . . . . . . . 7

B.Convert to Left Side Gas Piping. . . . . . . . . . . . . . . . . . 7

C. Gas Pressure. . . . . . . . . . . . . . . . . 8

4Installation Instructions

A.Install the Damper Stop. . . . . . . . . . . . . 9

B.Install the Burner/Pan Assembly. . . . . . . . . 9

C.Install the Grate. . . . . . . . . . . . . . . . 9

D.Place Sand and Rockwool. . . . . . . . . . . . 9

E.Install the Logs. . . . . . . . . . . . . . . . 10

F.Adjust the Burner Flame . . . . . . . . . . . . 10

G.Inspect the Venting System. . . . . . . . . . . 10

5Operating Instructions

A.Lighting Instructions. . . . . . . . . . . . . . 11

B.Glass Doors. . . . . . . . . . . . . . . . . 12

C.Important Safeguards . . . . . . . . . . . . . 12

6Maintaining and Servicing the Appliance

A.Servicing Your Appliance. . . . . . . . . . . . 13

B.Cleaning Your Appliance. . . . . . . . . . . . 13

C.Annual Inspection . . . . . . . . . . . . . . 13

D.Troubleshooting. . . . . . . . . . . . . . . 13

7Reference Materials

A.Replacement Parts . . . . . . . . . . . . 14-17

B.Warranty . . . . . . . . . . . . . . . . 18-19

C.Contact Information. . . . . . . . . . . . . . 20

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

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Contents Commonwealth of Massachusetts What to do if you smell gasListing Label Information/Location Homeowner Reference InformationTable of Contents Appliance Certification Listing and Code ApprovalsTools and Supplies Needed Getting StartedSize of Firebox Negative PressureShock Risk Fire Risk Components of the Gas Hearth KitAppliance Preparation Gas Supply ConnectionConvert to Left Side Gas Piping Gas Pressure Fire Risk Explosion Risk Asphyxiation RiskHigh Altitude Derate Install the Grate Installation InstructionsInstall the Damper Stop Install the Burner/Pan AssemblyInstall the Logs Adjust the Burner FlameInspect the Venting System Lighting Instructions Operating InstructionsImportant Safeguards Fire Risk High TemperaturesGlass Doors Servicing Your Appliance Annual Inspection Cleaning Your ApplianceTroubleshooting Maintaining and Servicing the ApplianceReplacement Parts MHK Hearth Kit AssemblyReference Materials Qty Description of PartSTMHK-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.
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