Procom QL300RYLA User Manual

The  following  are excerpts from

, 

, 

.

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 5 through 6
will  help  you classify   your  space and
provide  adequate  ventilation.

 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  aggregate

input  rating  of all appliances installed
in  that  space and an  unconfining
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

aggregate 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.

This  heater  shall  not  be  installed   in
a  confined  space  or  unusually   tight
construction  unless  provisions  are
provided   for  adequate  combustion
and  ventilation air.

*  Adjoining  rooms  are  communicating
only  if  there  are  doorless  passage-
ways  or   ventilation  grills   between
them.

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

   Includes  the room in which  you  will  install  heater  plus any  adjoining  rooms with doorless  passageways

or  ventilation  grills  between  the  rooms.
1.   Determine  the  volume  of  the space (length

×

width

×

height).

       Length

×

Width

×

Height=                  cu.ft. (volume of space)

      

  Space  size  20ft. (length)

×

16ft.(width)

×

8ft.  (ceiling  height)=2560cu. 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.   Divide  the  space  volume  by  50  cubic  feet  to  determine  the  maximum  Btu/Hr  the  space  can  support.
                          (volume of space)

÷

50 cu. ft.=(Maximum Btu/Hr the space can support)

      

  2560 cu. ft. (volume of space)

÷

50 cu.ft.=51.2 or 51,200(maximum Btu/Hr  the space can support)

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.
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

×

10

-11

kg

per pa-sec-m

2

) or less with

openings gasketed or sealed 

b)    weather  stripping  has  been  added

on openable windows and doors

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 plumbing,
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 

.

If your home does not meet all of the
three criteria above, proceed to