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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What does ventilation do? |
Helps with..... 1- Combustion 2- Correct operation of flues 3 - Cooling dispute heat and condenstion |
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Bad ventilation or air supply to the burner can cause... |
VITIATION |
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Incomplete Combustion causes what? |
carbon monoxide |
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What is adventitious air? |
Is the standard calculated amount or air flow with in a building or room Equivalent to 7kw or 35square cm? |
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What's the difference between Net and Gross? |
Nett is the actual usable heat. |
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How do you convert Gross to Nett? |
Divide by 1.11 see the worked example in hints. |
27kw gross boiler 27 divided by 1.11 = 24.32kw |
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DFE fires require what ventilation if instructions don't specify? |
100cm' to the outside. |
DFEs in excess of 20kw need a vent sized at 50% of the chimney throat. |
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An open Flued appliance not exceeding 7kw needs how much ventilation? |
None as this is covered under the adventitious air allowance |
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What is the ventilation requirements for an open Flued appliance of 21kw nett |
70 cm' |
21-7=14 14 * 5 = 70 |
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What is the ventilation requirements for an appliance of 21kw gross |
59.5 cm' |
21 / 1.11 =18.9 18.9 - 7 = 11.9 11.9 * 5 = 59.5 |
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Can a ventilation path go through a bathroom or shower room? |
Not allowed. |
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Can a ventilation path go through a bedroom? |
Not permitted if the appliance is over 14kw gross (12.7kw nett) or not fitted with a oxygen depletion device. |
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To help stop the spread of smoke from a fire at what height should a vent be from the floor? |
450mm |
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An oven in a room between 5 to 10 cube Mts, with door to outside requires what size free vent |
None But must have openable or equivalent to outside. |
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An oven in a room 5 to 10 cube Mts without a door to the outside. Vent required? |
50 square cm and an operable window |
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Instantaneous water heater max 12kw gross in a room of less than 5 cube Mts requires how much ventilation |
Not permitted. 5 to10mts needs 100cm' + window 10 to 20 Mts needs 50cm' + window Over 20mts cubed only a window |
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