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ventilation

Passive ventilation is the process of supplying air to and removing air from an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of pressure differences arising from natural forces.
There are two types of natural ventilation occurring in buildings: wind driven ventilation and buoyancy-driven ventilation. Wind driven ventilation arises from the different pressures created by wind around a building or structure, and openings being formed on the perimeter which then permit flow through the building. Buoyancy-driven ventilation occurs as a result of the directional buoyancy force that results from temperature differences between the interior and exterior.Since the internal heat gains which create temperature differences between the interior and exterior are created by natural processes, including the heat from people, and wind effects are variable, naturally ventilated buildings are sometimes called "breathing buildings".

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  1. M

    Bosch Worcester Greenstar i System Boiler Ventillation requirements

    Hi all, Looking for advice on the ventillation of the Bosch Greenstar i System Boilers. I've had one fitted into a new home I've purchased and the developer missed a course of bricks out so the ceiling is too low to install a vent to the outside. The boiler is in a small room (2m x 1x1.8m x...
    • Meeko
    • Thread
    • boiler bosch ceiling ducting extractor greenstar oil requirements system system boiler ventilation worcester
    • Replies: 15
    • Forum: Plumbing Jobs | The Job-board
  2. A

    ventilation for gas fires

    Hey all just wanted to get your thoughts,ive always been under the impression that a fire under 7kw doesn't need ventilation,after talking to a colleague who needed some advise on a fire another colleague over heard and said that all fuel effect fires need 100cm2. In my viper book there is a...
  3. D

    Ventilation

    Air vents used to go outside on the side of the house but customer has effectively turned it into a shed although it's not air tight what are your opinions? I think a new vent should be put in, as where they are located now they are likely to become blocked easily and it's not technically...
  4. U

    apprenticeship

    Hi my name is Wayne and I am fully qualified up to level 2 in heating.and ventilation! I am looking for.an apprenticeship to gain level 3. I live in Flintshire, North Wales. If anyone can help me in would be extremely grateful. Thanks in advance.
  5. N

    Noise travelling through ventilation pipes from one room to another

    I have a problem with noise travelling through the extraction system in a house, going from one room and travelling along the pipework into another room. Not ideal as you can hear people on the other room including in the bathroom too! Is there any way I can insulate against this at all?
  6. H

    Ventilation and meter housing

    Hello First post - found this forum via a google search and a similarish question 3 years ago. I am not a professional and am not attempting diy - just wondering if guidance re cavities and meter housing could be cleared up a bit more for me. Situation is we moved into new home, discover...
  7. S

    Soil Stack Ventilation Pipe

    Could someone please tell me if it is usual to have a 50mm waste pipe used as a soil stack ventilation pipe. The pipe ventilates a WC bath and sink. Thank you.
    • sally123
    • Thread
    • house oil pipe soil soil stack stack system thank ventilation waste
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  8. C

    cooker ventilation question

    went to fit a cooker in a council property today and it didn't have a openable door or window to outside due to a conservatory being fitted. no extractor either. So i didnt install the cooker and advised to the customer to contact the council about getting vent or or extractor fan fitted. she...
  9. D

    calculating ventilation

    hi all i just past my first stage to become a gas installer at work my stage 2 is i got to do a presentation on how to calculate the ventilation requirement for 1 / open flued domestic central heating boiler with a 27kw net 2/ ONE room sealed appliance in a compartment vented to a room...
  10. T

    Ventilation question

    Okay I am fitting a LPG/electric oven free standing cooker tomorrow, And the customer informs me theres an existing ancient solid fuel rayburn in situ. Where does the ground lie with regards ventilation for the hob? Ive had a flick through my books but they are pretty vague. cheers guys
  11. A

    Flueing and Ventilation Situation Classification - Commercial Boiler Room

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  12. W

    Ventilation for multiple appliances in the same room?

    Hi there, Im about to take my ACS and need something clearing up. I was taught that if you have 2 or more appliances of the same category in a room (e.g. Open flued boiler & a radiant gas fire) then adventitious air is not taken into account. However, reading other books and online literature...
  13. W

    Ventilation for ILFE?

    Hi there, I have an ILFE gas fire. It is under 7kw. It's old, possibly 25years. There is no additional ventilation and there is nothing about ventilation in the MI's. Do ILFE's follow the same ventilation rules as DFE's? Thanks in advance :-)
  14. D

    Gas cooker ventilation requirements

    Hello Forum, My kitchen has a gas cooker, about 10rs ago we had a conservatory installed the full width of the back kitchen such that any openable windows open into the conservatory. Now that I need to replace the cooker I am told that I need ventilation direct to the outside. Could this be...
    • Deleted member 15730
    • Thread
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    • Replies: 26
    • Forum: Plumbing Jobs | The Job-board
  15. S

    C&G Heating & Ventilation Level 2 Apprentice [LOOKING FOR WEEKEND WORK]

    Hi all, I am a C&G Heating & Ventilation Apprentice looking to gain extra experience/knowledge within the industry. I am currently employed by a company working commercially throughout the week, however want to spend my time over the weekends and assist another plumber/pipe-fitter to gain an...
  16. A

    BS5871 Part 1

    Please can anyone give me some advice on BS5871 Part 1? I have a 5.5kw gas fire installed approx 18 months ago in a 100 year old, property....do I need to have a vent/air brick to be compliant?
  17. AlexGas

    Ventilation paradox…

    Here’s a question: Gas pipework located within unventilated duct or voids is AR. How come having a gas pipe between timber joists in floors is not an issue? :confused5:
  18. M

    Required ventilation?

    Am I right in thinking that a gas fire which is less than 7kw does not need any other ventilation other than adventitious air???
  19. S

    Ventilation

    Hey guys, I'm sure this comes up a lot but I was hoping someone could help me out. I recently bought a new house with a Baxi Bermuda 401 back boiler in the lounge and an old gas fire over the front of it. I was surprised to find that the ventilation was located in the kitchen with no vents...
  20. S

    Always good to see ventilation.

    Caried out Llgsi today on a fire and was pleased to see the appropriate ventilation Wait........ hold on a minute....... whats going on here then. Crafty so on so's have fitted a vent blocking force field almost invisible to the eye. Always pays to check.
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