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126700-01C

8

AIR FOR COMBUSTION AND VENTILATION

Unusually  tight  construction  is  defined  as 

construction where:

a.  walls and ceilings exposed to the outside 

atmosphere have a continuous water 

vapor retarder with a rating of one perm 

(6 x 10

-11

 kg per pa-sec-m

2

) or less with 

openings gasketed or sealed and

b.  weather stripping has been added on 

openable windows and doors and

c.  caulking or sealants are applied to areas 

such as joints around window and door 

frames, between sole plates and floors, 

between wall-ceiling joints, between 

wall panels, at penetrations for plumb-

ing, electrical and gas lines and at other 

openings.

If your home meets all of the three criteria 

above, you must provide additional fresh air. 

See 

Ventilation Air From Outdoors

Page 10

If your home does not meet all of the three 

criteria above, proceed to 

Determining Fresh-

Air Flow For Firebox Location

.

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/ 

NFPA54 

allows  two  methods  for  determining 

whether the space in which the heater is being 

installed is confined or unconfined space. The 

standard method

 

defines a confined space as a 

space whose volume is less than 50 cubic feet 

per 1,000 Btu per hour (4.8 m

3

 per kw) of the ag

-

gregate input rating of all appliances installed in 

that space and an unconfined space as a space 

whose volume is not less than 50 cubic feet per 

1,000 Btu per hour (4.8 m

3

 per kw) of the ag

-

gregate input rating of all appliances installed in 

that space. Rooms communicating directly with 

the space in which the appliances are installed*, 

through openings not furnished with doors, are 

considered a part of the unconfined space.
Where the air infiltration rate of a structure is 

known, the Known Air Infiltration Rate Method 

may  be  used.  Follow The  National  Fuel  Gas 

Code, ANSI Z223.1/NFPA 54 to use this 

method  to  determine  if  the  space  is  confined 

or unconfined.

* Adjoining rooms are communicating only if 

there are doorless passageways or ventilation 

grills between them.

DETERMINING FRESH-AIR FLOW FOR 

HEATER LOCATION

Determining if You Have a Confined or 

Unconfined Space Using the Standard 

Method

Today’s homes are built more energy efficient 

than ever. New materials, increased insulation 

and new construction methods help reduce heat 

loss in homes. Homeowners apply weather strip 

and caulk around windows and doors to keep 

the cold air out and the warm air in. During heat

-

ing months, homeowners want their homes as 

airtight as possible.
While it is good to make your home energy 

efficient,  your  home  needs  to  breathe.  Fresh 

air must enter your home. All fuel-burning ap-

pliances need fresh air for proper combustion 

and ventilation.

Exhaust  fans,  some  fireplaces,  clothes  dryers 

and some fuel-burning appliances draw air from 

the house to operate. You must provide adequate 

fresh air for these appliances. This will ensure 

proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATE VENTILATION

The following are excerpts from 

National Fuel 

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

bustion and Ventilation

.

All spaces in homes fall into one of the three 

following ventilation classifications:
1.  Unusually Tight Construction
2.  Unconfined Space
3.  Confined Space

The information on 

Pages 8 through 10

 will help 

you classify your space and provide adequate 

ventilation.

Unusually Tight Construction

The air that leaks around doors and windows 

may provide enough fresh air for combustion and 

ventilation. However, in buildings of unusually 

tight construction, you must provide additional 

fresh air.

 WARNING: This heater shall not 

be installed in a room or space un-

less the required volume of indoor 

combustion air is provided by the 

method described in the 

National 

Fuel Gas Code, ANSI Z223.1/NFPA 

54,

 the 

International Fuel Gas 

Code,

 or applicable local codes. 

Read the following instructions 

to ensure proper fresh air for this 

and other fuel-burning appliances 

in your home.

Summary of Contents for VRT4536WH

Page 1: ...ury death or property damage Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appli...

Page 2: ...ANSI Z21 11 2 decorative type un vented room heater WARNING Anychangetothisfire box or its controls can be dangerous DANGER Carbon monoxide poi soning may lead to death WARNING Do not use a blower ins...

Page 3: ...te clearances around air openings 11 Use only the provided hood See Parts Page 19 Due to high temperatures the ap pliance should be located out of traffic and away from furniture and draperies Do not...

Page 4: ...Fuel Gas Code ANSI Z223 1 NFPA 54 National Fuel Gas Code latest edition Firebox must be electrically grounded in accordance with the National Electrical Code ANSI NFPA 70 latest edition COMMONWEALTH...

Page 5: ...T SPECIFICATIONS 36 MODELS Figure 1 36 Models VRT4536WS and VRT4536WH Picture may vary from actual fireplace 30 1 2 29 30 11 1 8 54 3 4 7 7 8 7 36 45 1 4 33 8 91 2 50 1 8 363 8 7 3 8 111 8 3 3 4 4 7 8...

Page 6: ...FICATIONS Continued 42 MODELS Figure 2 42 Models VRT4542WS and VRT4542WH Picture may vary from actual fireplace 4 7 8 54 3 4 7 7 8 7 36 3 8 50 1 8 42 51 1 4 32 3 8 3 3 4 30 3 8 8 3 4 13 3 3 8 9 1 2 30...

Page 7: ...CIFICATIONS Continued 50 MODELS Figure 3 50 Models VRT4550WS and VRT4550WH Picture may vary from actual fireplace 363 8 50 1 8 8 3 4 13 33 8 91 2 59 1 4 50 7 7 8 7 30 54 3 4 11 1 8 32 3 8 3 3 4 38 3 8...

Page 8: ...termine if the space is confined or unconfined Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them DETERMINING FRESH AIR FLOW FOR HEATER LOCATIO...

Page 9: ...u 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 63 360 Btu Hr maximum the space can...

Page 10: ...d ser vice person must install firebox Follow all local codes CAUTION Log heaters in stalled in this firebox create warmaircurrents Thesecurrents move heat to wall surfaces next to firebox Installing...

Page 11: ...eplace cabinet see Figure 4 B Clearances from the top of the firebox opening to the ceiling should not be less than 42 C When firebox is installed on carpeting tile other than ceramic or other combust...

Page 12: ...s in Figure 9 for rough opening 2 Install gas piping to firebox location See Gas Line Installation on Page 16 and Con necting to Gas Supply in log set owner s manual WARNING Do not allow any combustib...

Page 13: ...t mantel against a wall in your home The firebox and cabinet mantel can be installed directly on the floor Mantels may be avail able from your retailer or custom built for your home 1 Assemble cabinet...

Page 14: ...NEL PANEL RIGHT BRICK REAR BRICK PANEL BOTTOM BRICK PANEL ASH PANEL UPPER CORNER BRACKET 2x 3 Install rear refractory panel This panel has a top and bottom To determine which is which match up the pat...

Page 15: ...of fireplace and pull out insula tion from gas line conduit sleeve Save insulation for reuse Replace screws 3 Run a 1 2 black iron gas line into fireplace through the rear at gas line conduit sleeve...

Page 16: ...If you wish to install an unvented vent free gas log set only unvented gas log sets which have been found to comply with the standard for unvented room heaters ANSI Z21 11 2 are to be installed in thi...

Page 17: ...Outside Air Kit Collar Hood 3 Flex for Floor Venting Cat No F1094 Model AK4B 50 piece Bulk Outside Air Kit Collar Only Kit OPTIONAL OUTSIDE AIR KIT FOR SIDEWALL INSTALLATION Cat No F1091 Model AK4 4 A...

Page 18: ...10 11 13 14 15 16 14 3 22 20 21 20 1 19 5 14 15 16 13 12 11 9 7 6 8 17 2 12 18 4 Cat No Model Interior F0277 VRT4536WS White Stack F0278 VRT4536WH White Herr F0279 VRT4542WS White Stack F0280 VRT4542...

Page 19: ...irebox Top 1 20 J4342 Screen 36 2 J4341 Screen 42 2 J4340 Screen 50 2 F3235 Screen 36 Stainless 2 F3236 Screen 42 Stainless 2 F3237 Screen 50 Stainless 2 21 J6928 Screen Rod 36 2 J4391 Screen Rod 42 2...

Page 20: ...vary from actual 1 2 5 3 4 6 6 1 2 3 4 5 6 7 7 WARNING REFRACTORY PANELS LIFTING HAZARD SINGLE PERSON LIFT COULD CAUSE INJURY USE ASSISTANCE WHEN MOVING OR LIFTING IMPORTANT Installation of refractor...

Page 21: ...tural White 1 Right Stacked 42 Natural White 1 Right Herringbone 42 Natural White 1 Right Stacked 50 Natural White 1 Right Herringbone 50 Natural White 1 4 Left Stacked 36 Natural White 1 Left Herring...

Page 22: ..._________________________________________________ ______________________________________________________ ______________________________________________________ ________________________________________...

Page 23: ...ural or propane gas only Burning conventional fuels such as wood coal or any other solid fuel will cause damage to the Product will produce excessive temperatures and could result in a fire hazard c d...

Page 24: ...istributor for fireplace code information Printed in U S A 2021 Innovative Hearth Products P N 126700 01 Rev C 06 2021 1769 East Lawrence Street Russellville AL 35654 SuperiorFireplaces us com Record...

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