Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,916   Posts: 1,584,715   Online: 819
      
Page 3 of 5 FirstFirst 12345 LastLast
Results 21 to 30 of 42
  1. #21
    Steve Smith's Avatar
    Join Date
    May 2006
    Location
    Ryde, Isle of Wight
    Shooter
    Medium Format
    Posts
    8,711
    Images
    122
    Quote Originally Posted by laser View Post
    Don't forget that the flames in heating units also emit light.
    As do luminous watches... apparently!


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  2. #22

    Join Date
    Sep 2010
    Location
    Castle Rock, CO, USA
    Shooter
    Multi Format
    Posts
    1,491
    Images
    66
    It would be a very good idea to use positive ventilation - knock a hole in an internal wall and install a fan to push the air into the room instead of pulling it out. This is better for dust too because you can filter the air going into the room from the rest of the house.
    “You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live.” - John Galt

  3. #23
    AgX
    AgX is offline

    Join Date
    Apr 2007
    Location
    Germany
    Shooter
    Multi Format
    Posts
    9,083
    What would be the disadvantages of positive pressure ventilation?
    One could be that lab air is pressed into other rooms. Any more?

  4. #24

    Join Date
    Feb 2008
    Location
    Winnipeg, Canada
    Shooter
    Multi Format
    Posts
    1,301
    Without it, the flue gases from the existing hot water tank would be drawn into the room by the exhaust fan instead of going up the chimney. All that is needed is a fan of the same cfm rating as the exhaust fan, and they both should be on the same power switch.
    Bob

  5. #25
    Steve Smith's Avatar
    Join Date
    May 2006
    Location
    Ryde, Isle of Wight
    Shooter
    Medium Format
    Posts
    8,711
    Images
    122
    Quote Originally Posted by Bob-D659 View Post
    Without it, the flue gases from the existing hot water tank would be drawn into the room by the exhaust fan instead of going up the chimney.
    we need to know if the burner is sealed to the room or if it draws its air from the room in order to make a statement to that effect.


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  6. #26

    Join Date
    Nov 2005
    Location
    San Clemente, California
    Shooter
    Multi Format
    Posts
    1,130
    Quote Originally Posted by Bob-D659 View Post
    Without it, the flue gases from the existing hot water tank would be drawn into the room by the exhaust fan instead of going up the chimney...
    Quote Originally Posted by Steve Smith View Post
    we need to know if the burner is sealed to the room or if it draws its air from the room in order to make a statement to that effect...
    Look at photo three in post #18. The hot water heater is an atmospheric gas-fired type that draws combustion air from the room in which it's installed and vents its exhaust via convection through a galvanized steel stove-pipe chimney. As opposed to the space heating furnace, which is a sealed-combustion condensing type, drawing outside air through one PVC pipe and venting its exhaust through a second PVC pipe.

    Balanced ventilation of the space is definitely necessary to avoid problems with water heater exhaust gas. I still wouldn't do this without installing a fast-acting, low-level carbon monoxide detector. Better yet, partition off the furnace and water heater as suggested in post #9. I'd rather see you go digital than die in a darkroom.

  7. #27

    Join Date
    Sep 2010
    Location
    Castle Rock, CO, USA
    Shooter
    Multi Format
    Posts
    1,491
    Images
    66
    Quote Originally Posted by Bob-D659 View Post
    Without it, the flue gases from the existing hot water tank would be drawn into the room by the exhaust fan instead of going up the chimney. All that is needed is a fan of the same cfm rating as the exhaust fan, and they both should be on the same power switch.
    Oooh. Good solution.
    “You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live.” - John Galt

  8. #28

    Join Date
    Feb 2008
    Location
    Winnipeg, Canada
    Shooter
    Multi Format
    Posts
    1,301
    Steve, that style of hot water tank has been the norm in the US and Canada for decades. Easily identifiable from the photo as Sal wrote.

    Even if the tank and furnace are partitioned off, there has to be a good sized vent grill to the open area of the basement/house.
    Bob

  9. #29
    Steve Smith's Avatar
    Join Date
    May 2006
    Location
    Ryde, Isle of Wight
    Shooter
    Medium Format
    Posts
    8,711
    Images
    122
    Quote Originally Posted by Bob-D659 View Post
    Steve, that style of hot water tank has been the norm in the US and Canada for decades.
    It is the type which was banned here decades ago - and for good reason.


    Steve,
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  10. #30

    Join Date
    Nov 2005
    Location
    San Clemente, California
    Shooter
    Multi Format
    Posts
    1,130
    Quote Originally Posted by Bob-D659 View Post
    ...Even if the tank and furnace are partitioned off, there has to be a good sized vent grill to the open area of the basement/house.
    Yes, and even that relies on the house being leaky enough so outside air can enter. A space that's sealed from the rest of the house but communicates directly with the outside would be better. Heating appliance manufacturers specify the free vent area in their Installation and Operation manuals.

    It's unfortunate that so much of this continent heats with "scorched air." If the OP's house used a sealed combustion boiler and hot water space heating, his comfort level would be higher and an indirect tank could be installed for domestic hot water too. Then there would be no need to consider these venting matters when planning his darkroom.

Page 3 of 5 FirstFirst 12345 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin