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VSW20 Wood Stove

14

20300059

INSTAllATION

3.  If the overall R-value of the system is greater than the 

R-value of the specified floor protector, the alternate is 
acceptable.

EXAMplE:

 The specified floor protector should be 3/4-inch 

thick material with k-factor of 0.84. The proposed alternate 
is 4” brick with an r-factor of 0.2 over 1/8” mineral board 
with a k-factor of 0.29
Step a: Use formula above to convert specification to R-

value:

Step b: Calculate R of proposed system. 
  4” brick of r = 0.2, therefore:
   R

brick

 = 0.2 x 4 = 0.8

  1/8” mineral board of k = 0.29, therefore
   R

mineralboard

 =         x 0.125 = 0.431 

   R

total

 = R

brick

 + R

mineralboard

 = 0.8 + 0.431 = 1.231

Step c: Compare proposed system Rtotal of 1.231 to 

specified R of 1.19. Since proposed system Rtotal is 
greater than required, the system is acceptable.

Definitions

FlOOR  pROTECTION  FOR  FIREplACE  IN-
STAllATIONS 

Do not assume your fireplace hearth is completely non-
combustible.  
Many fireplace hearths do not satisfy the “completely non-
combustible” requirement because the brick or concrete in 
front of the fireplace opening is supported by heavy wood 
framing as in 

Figure 11

. Because heat passes through brick 

or concrete readily, it can easily  pass through to the wood. 
As a result, such fireplace hearths can be a fire hazard and 
are considered a combustible floor.  
Keep in mind that many raised hearths will extend less than 
the required clearance from the front of the heater when 
it is installed. In such cases, sufficient floor protection as 
described above must be added in front of the hearth to 
satisfy the minimum floor protector requirement from the 
front of the stove: 18” (460 mm) from the front in Canada. 
Fireplace hearths must also offer the required protection 
of 8” (203 mm) on either side. 
Optional 3” (76 mm) short legs may be used only on  such 
hearths that meet the width and depth requirements out-
lined previously under “floor protection.”
Hearth rugs do not satisfy the requirements for floor pro-
tection.  

Fireplace installations also have special clearance require-
ments to the side walls, side decorative trim, and fireplace 
mantle. Refer to the information on  fireplace and mantel 
trim shields in this section.

ST1098
floor install

Wood framing 
requires protection 
from radiant heat

ST1098

Figure 11 - 
Supporting timbers under fireplace hearth 
are considered to be combustible

kEEp ThE STOVE ANd CONNECTOR A 
SAFE dISTANCE FROM SuRROuNdINg MA-
TERIAlS

Both a stove and its chimney connector radiate heat in all 
directions  when  operating,  and  dangerous  overheating 
of nearby combustible materials can occur if they are too 
close to the heat.  A safe installation requires that adequate 
clearance  be maintained between the hot stove and its 
connector and nearby combustibles.
Clearance  is  the  distance  between  either  your  stove 
(measured from the back edge of the stove’s top plate) or 
chimney connector, and nearby walls, floors, the ceiling, 
and any other fixed combustible surface.  Your stove has 
special clearance requirements that have been established 
after careful research and testing to UL and ULC standards.  
These clearance requirements must be strictly observed.
In addition, furnishings and other combustible  materials 
must be kept away from the stove as well.  In general, a 
distance of 48” (1220 mm) must be maintained between 
the stove and moveable combustible items such as dry-
ing clothes, furniture, newspapers, firewood, etc. Keeping 
those clearance areas empty assures that nearby surfaces 
and objects will not overheat.

 

r =                   = 

(ft

2

)(hr)(°F)

(Btu)(in)

1

k

(Btu)(ft)

(ft

2

)(hr)(°F)

 

K =                

 

k =                   = K x 12

(Btu)(in)

(ft

2

)(hr)(°F)

 

R = 

(ft

2

)(hr)(°F)

Btu

Summary of Contents for VSW20

Page 1: ...perly installed a house fire may result To reduce the risk of fire follow the installation instructions Failure to follow instructions may result in property damage bodily injury or even death Contact...

Page 2: ...e and proper care it will provide you with many years of service This manual contains valuable instructions on the installation and operation of your Vermont Castings stove You will also find useful i...

Page 3: ...such fuels contain chemicals known to the State of California to cause cancer birth defects and other reproductive harm California Health and Safety Code Sec 25249 6 WARNING HOT GLASS WILL CAUSE BURN...

Page 4: ...wood fuel The stove is intended for operation only with the door fully closed Do not install any products not specified for use with this stove SAFETY INFORMATION BEFORE INSTALLATION OF YOUR APPLI AN...

Page 5: ...aft is obtained operate only with doors closed and open slowly when re fueling This will reduce or eliminate smoke from entering the room Attempts to achieve higher output rates that exceed heater des...

Page 6: ...pending on how the stove is operated type and moisture content of fuel and other factors Maximum burn times are achieved under different operating conditions than are maximum heat outputs 2 These valu...

Page 7: ...r combustion because of insufficient air infiltration into the building Such air enters a home through unsealed cracks and openings Kitchen or bath exhaust fans can compete with the stove for availabl...

Page 8: ...h a chimney can take quite a while to warm up and the stove performance will likely be disappointing The best solution to an oversize flue problem is the installation of an insulated steel chimney lin...

Page 9: ...te is a flammable and when ignited make an extremely hot fire within the flue system which can damage the chimney and overheat adjacent combustible material To reduce the amount of creosote that may f...

Page 10: ...connector sections Consult your local dealer about these special pieces ST242 Chimney connector 12 13 99 djt Secure the Single wall Connector to a Prefabricated Chimney For prefabricated chimneys fol...

Page 11: ...ctor Flue Collar Flue Flue Liner Thimble ST1094 Figure 5 Freestanding Installation Chimney Connection ST1095 chimney connector above fireplace Chimney Connector Shields Check These Clearances Mantel S...

Page 12: ...is separated from combustibles by 6 150 mm of fiberglass insulating material Placing a section of chimney connector inside a section of 9 230 mm diameter solid insulated factory built chimney with 2...

Page 13: ...east 16 from the front of the stove and at least 8 from the sides and rear Figure 10 In Canada a noncombustible floor protector is required under the heater also The floor protector must extend 18 457...

Page 14: ...offer the required protection of 8 203 mm on either side Optional 3 76 mm short legs may be used only on such hearths that meet the width and depth requirements out lined previously under floor prote...

Page 15: ...8 SSW40 clearances 10 08 Top Vent out the Back Wall with Minimum 2 Vertical Figure 12 Clearances to Combustibles ST1008 Clearance to Combustibles UL 1482 and ULC s627 Minimum clearance to combustible...

Page 16: ...a chimney fire All of the installation characteristics that adversely affect chimney draft also promote creosote condensation Consequently you can minimize creosote accumulation with an effective chim...

Page 17: ...ideal coal bed of 1 25 mm to 2 51 mm should be established to achieve optimum performance 6 This unit is designed to function most effectively when air is allowed to circulate to all areas of the fir...

Page 18: ...ith the use of a readily available oven cleaner 5 Never put substances which can ignite explosively in the unit since even small explosions in confined areas can blow out the glass 6 This unit has an...

Page 19: ...ems 3 BURN ONLY SEASONED WOOD Avoid burning wet or green wood Seasoned wood has been dried for at least one year 4 A small hot fire is preferable to a large smoldering one that can deposit creosote wi...

Page 20: ...013 8 Secondary Air Tube Middle 1 63D1012 9 Secondary Air Tube Back 1 63D1011 10 C Cast Combo VSW20 1 63D1007 11 C Cast top VSW20 1 63D1009 12 Shield Rear Adjustable Air 1 63D1039 13 Shield Rear Outsi...

Page 21: ...fficient space in the firebox Adjust the air control setting to desired setting Page 17 i Note The lower the air control setting the longer the burn time of your firewood 2 What type of wood is best t...

Page 22: ...r or not there is sufficient air in your home for your stove curtail from using those appliances known to consume the air where possible or open a window or door to allow air to enter the home b Envir...

Page 23: ...e Warranty will also be void if the appliance is not operated and maintained according to the operating instructions supplied with the appliance and does not extend to 1 firebox burner assembly damage...

Page 24: ...VSW20 Wood Stove 24 20300059 MHSC 149 Cleveland Drive Paris Kentucky 40361 www mhsc com...

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