AIR for Combustion Ventilation | FMI FMH26TN instruction

NATURAL GAS VENT-FREE FIREPLACE SYSTEM

AIR FOR

COMBUSTION AND

VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR FIREPLACE LOCATION

Determining if You Have a Confined or Unconfined Space

Use this worksheet to determine if you have a confined or unconfined space.

Space: Includes the room in which you will install fireplace plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.

1.Determine the volume of the space (length x width x height).

Length x Width x Height = _________________ cu. ft. (volume of space)

Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

_____________________ (volume of space) x 20 = (Maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)

3.Add the Btu/Hr of all fuel burning appliances in the space.

Vent-free fireplace		__________________ Btu/Hr	Example:
Gas water heater*		__________________ Btu/Hr	Example:
Gas furnace		__________________ Btu/Hr	Gas water heater		30,000	Btu/Hr
Vented gas heater		__________________ Btu/Hr	Vent-free fireplace	+	26,000	Btu/Hr
Gas fireplace logs	+	__________________ Btu/Hr	Total	=	56,000	Btu/Hr
Other gas appliances*		__________________ Btu/Hr	Total	=	56,000	Btu/Hr
Other gas appliances*		__________________ Btu/Hr
Total	=	__________________ Btu/Hr

*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

4.Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.

_________________ Btu/Hr (maximum the space can support)

_________________ Btu/Hr (actual amount of Btu/Hr used)

Example: 51,200 Btu/Hr (maximum the space can support) 56,000 Btu/Hr (actual amount of Btu/Hr used)

The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:

A.Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin- ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.

C.Install a lower Btu/Hr fireplace, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3 or applicable local codes.

107105

FMH26TN specifications

The FMI FMH26TN is a cutting-edge heating and cooling solution that has garnered attention for its innovative design and advanced features. This model exemplifies the fusion of efficiency and functionality, aiming to provide optimal comfort for both residential and commercial spaces.

One of the standout characteristics of the FMI FMH26TN is its powerful heating performance. It utilizes a high-efficiency burner system that enables it to produce an impressive output of 26,000 BTUs, making it suitable for medium to large-sized rooms. The unit employs an advanced heat exchanger that maximizes heat transfer while minimizing gas consumption, aligning with modern energy efficiency standards.

In addition to its robust heating capabilities, the FMH26TN also integrates a variety of technological advancements. It features an electronic ignition system that guarantees reliable startup with minimal energy waste. Moreover, the unit comes equipped with a multi-speed blower motor that not only enhances airflow but also allows users to adjust the heating intensity according to their preferences. This flexibility is especially beneficial during the transitional seasons when heating needs can vary significantly.

Another key component of the FMI FMH26TN is its state-of-the-art control system. The model supports programmable thermostats, enabling a tailored heating schedule that can adapt to any lifestyle. Users can easily set timers and temperature preferences, ensuring maximum comfort while enhancing energy savings.

The design of the FMI FMH26TN is also a notable feature. It boasts a sleek and modern aesthetic that can blend seamlessly into various interior styles. The unit is constructed with high-quality materials that ensure durability, which is indispensable for long-term use. Additionally, it includes a minimalistic control panel, making it user-friendly and accessible for anyone to operate.

Safety is another paramount concern addressed by the FMH26TN. The unit includes features such as an automatic shut-off system in case of overheating, ensuring peace of mind for users.

In summary, the FMI FMH26TN stands out for its powerful heating output, energy efficiency, modern design, and user-friendly technology. With its combination of advanced features, this model is poised to meet the diverse heating needs of contemporary living spaces while emphasizing reliability and comfort.