Hearth and Home Technologies MHK24NG, MHK18NG Getting Started, Size of Firebox, Negative Pressure

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2 Getting Started

A. Size of Firebox

See Table 1 in Section 1.B.

B. Negative Pressure

Negative pressure results from the imbalance of air avail- able for the fireplace to operate properly. Causes for this imbalance include:

•Exhaust fans (kitchen, bath, etc.).

•Range hoods.

•Combustion air requirements for furnaces, water heaters and other combustion appliances.

•Clothes dryers.

•Location of return-air vents to furnace or air conditioning.

•Imbalances of the HVAC air handling system.

•Upper level air leaks: recessed lighting, attic hatch opening, duct leaks.

C. Tools and Supplies Needed

Tools and supplies normally required for installation: Pliers

Phillips screwdriver Tape measure Crescent wrenches Gas shutoff valve

Non-corrosive leak check solution 3/4 in. wrench, 7/16 in. wrench

CAUTION

Sharp Edges

•Wear protective gloves and safety glasses during installation.

WARNING

Asphyxiation Risk

This appliance produces carbon monoxide (CO).

•The free opening areas (in square inches) of the chimney damper as shown in the tables must be met.

•User must make sure damper is locked open.

•The installer is responsible to ensure proper ventilation of flue gases before appliance is used.

Fire needs to draft properly for safe operation.

D. Inspect the Appliance and Components

•Remove the contents from the carton. Attached to the burner are tags identifying the manufacturer name, serial number, model number (including gas log size), BTU ratings, gas type, etc.

•Review the attached tags before proceeding. Ensure that all minimum fireplace dimension requirements are achieved using Table 1 in Section 1.B. See Figure 2.1. Ensure the gas type provided in the fireplace coincide with the gas type marked on the tag.

WARNING

Hearth & Home Technologies disclaims any responsibility for, and the warranty will be voided by, the following actions:

•Installation and use of any damaged appliance or vent system component.

•Modification of the appliance or vent system.

•Installation other than as instructed by Hearth & Home Technologies.

•Improper positioning of the gas logs or the glass door.

•Installation and/or use of any component part not approved by Hearth & Home Technologies.

Any such action may cause a fire hazard.

Figure 2.1 Measure Firebox

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 ApprovalsSize of Firebox Getting StartedNegative Pressure Tools and Supplies NeededShock Risk Fire Risk Components of the Gas Hearth KitConvert to Left Side Gas Piping Appliance PreparationGas Supply Connection High Altitude Derate Gas PressureFire Risk Explosion Risk Asphyxiation Risk Install the Damper Stop Installation InstructionsInstall the Burner/Pan Assembly Install the GrateInspect the Venting System Install the LogsAdjust the Burner Flame Lighting Instructions Operating InstructionsGlass Doors Important SafeguardsFire Risk High Temperatures Troubleshooting Cleaning Your ApplianceMaintaining and Servicing the Appliance Servicing Your Appliance Annual InspectionReference Materials Replacement PartsMHK Hearth Kit Assembly 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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