Mr. Heater Plaque HSVFR10LP Operations Instructions download pdf (Page 5)

Installation Instructions and Owner’s Manual

Unvented Natural Gas Fired Room Heater

attics* and crawl spaces. Follow the National Fuel Gas

Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for Com-

bustion and Ventilation for required size of ventilation

grills or ducts.

*IMPORTANT: Do not provide openings for inlet or

outlet into attic. If attic has a thermostat-controlled

power vent, heated air entering the attic will activate

the power vent.

IMPORTANT: Vent-free heaters add moisture to

the air. Although this is benecial, installing heater

in rooms without enough ventilation air may cause

mildew to form from too much moisture. See Fresh

Air for Combustion and Ventilation, pages 4

through 6.

INSTALLATION

NOTICE: This heater is intended for the use as supple-

mental heat. Use this heater along with your primary

heating system. Do not install this heater as your pri-

mary heat source. If you have a central heating system,

you may run system’s circulating blower while using

heater. This will help circulate the heat throughout the

house. In the event of a power outage, you can use this

heater as your primary heat source for the duration of

the outage.

heater, Gas furnace, Vented gas heater, Gas re-

place logs, and Other gas appliances*

*Do not include direct-vent gas appliances. Direct-

vent draws combustion air from the outdoors and

vents to the outdoors.

Example:

Gas water heater 40,000 Btu/hr

Vent Free Heater + 20,000 Btu/hr

Total =60,000 Btu/hr

4. Compare the maximum Btu/hr the space can support

with the actual amount of Btu/hr used.

Example: 51,800 Btu/hr (maximum Btu/hr the

space can support)

60,000 Btu/hr (Actual amount of Btu/hr used)

The space in the above example is a conned

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, and the space of an adjoining

room. If the extra space provides an unconned

space, remove door to adjoining room or add venti-

lation grills between the rooms. See Ventilation Air

From Inside Building (Fig. 2)

B. Vent room directly to the outdoors. See Ventilation

Air From Outdoors (Fig. 3).

C. Install a lower Btu/hr heater if lower Btu/hr size

makes room unconned.

If actual Btu/hr used is less than the maximum Btu/

hr the space can support, the space is an uncon-

ned space. You will need no additional fresh air

ventilation.

VENTILATION AIR

Ventilation from Inside Building

This fresh air would come from an adjoining unconned

space. When ventilation to an adjoining unconned

space, you must provide two permanent openings: one

within 12” of the ceiling and one within 12” of the oor

on the wall connecting the two spaces (see options 1

& 2 of gure 2). You can also remove door into adjoin-

ing room (see option3, g 2). Follow the National Fuel

Gas Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for

Combustion and Ventilation for required size of ventila-

tion grills or ducts.

WARNING: Rework worksheet, adding the space

of the adjoining unconned space. The combined

space must have enough fresh air to supply all ap-

pliance in both spaces.

Ventilation from Outdoors

If necessary provide extra fresh air by using ventila-

tion grills or ducts. Connect these items directly to the

outdoors or spaces open to the outdoors. These include

Ventilation

Gills into

Adjoining

Room - Op-

tion 1

Ventilation Gills into Ad-

joining Room - Option 2

12”

Or remove

door into

Adjoining

Room -

Option 3

INLET

AIR

OUTLET

AIR

VENTILATION CRAWL SPACE

TO CRAWL

SPACE

TO ATTIC

VENTILATION AIR

VENTILATED

ATTIC

OUTLET AIR

Figure 2

Figure 3.

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Mr. Heater Plaque HSVFR10LP Operations Instructions Page 5

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