Ventilation Questions – Flashcards
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| Ventilation for a flueless gas hob or cooker is dependant on ? |
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| The room volume, and openable window or similar |
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| ventilation provision for a flueless water heater is dependant on..? |
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| The appliance gas consumption and heat input along with the room volume and an openable window or similar |
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| You attend a property where there is a small kitchen with openable window and door directly to outside. The room is 9M3, what size vent is required? |
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| None Required |
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| Purpose provided ventilation for a flueless appliance must communicate directly with the outside air, whether directly or via a duct. |
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| True |
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| In the event that more than one gas appliance is installed in the same room area, the method for calculating this multi appliance ventillation would be to (BS 5440) |
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| provide ventilation for the appliance/flue category, that is likely to be operating and generating the greatest demand. |
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| What are the flueless ventilation requirements for an 8kW nett over sink Instantaneous water heater installed in the kitchen measuring 3 metres long, 3 metres wide and 2 metres from floor to ceiling? |
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| 50cm2 |
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| A 7kW (Gross) Natural Gas (G20) flueless space heater permanently fixed in the hallway providing at max setting up to 70W/M3 Of space heating will require a permanent fixed vent direct to the outside of. |
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| 125cm2 |
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| A flueless gas cooker is found in a room 18m3 which has no direct ventilation to outside The floor area of this room is 9M2. It has an openable window and door which open into a conservatory with a floor area of 12M2. The conservatory then opens into the garden. The following is true |
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| A permanent vent of at least 80cm2 from the kitchen to the conservatory and a further 80cm2 vent from the conservatory to outside is required. (this could be a vent above the openings) The door between the Kitchen and Conservatory, and then conservatory to outside would each have to provide a free area of over 1.05M2 in their open position. |
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| Under what category of unsafe classification would you place a flueless gas cooker installed in a kitchen 7M3 with an openable window no openable door to outside and no additional ventilation provision. |
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| AR |
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| 2 x DFE's of rated het input 6.6kw nett are installed in a through lounge diner. Without manufacturer's instructions the total ventillation requirement will be |
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| Nil |
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| 2 x DFE's 6.5 kw nett each are installed in a Through lounge diner, one in the dining area, the other in the lounge. The manufacturer's instructions state that where the appliance passes its flue flow and spillage test no additional ventilation will be required. On testing both appliances pass their flue performance tests. How much if any ventillation will be required |
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| 235cm2 |
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| Apart from DFE?s, an open flued gas appliance ventilation consideration will allow for the first 7kW of rated heat input of each appliance without a need for additional ventilation except when |
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| The Appliance is installed in a compartment and vented direct to outside ( ) There is more than one open flued appliance in a room area |
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| When Calculating the combustion and compartment ventilation requirements of an open flued appliance within a cupboard which is vented either direct to outside or into a room which has a suitable vent to outside is it permissible to deduct the first 7kw in terms of adventitious air when calculating the combustion and compartment ventilation requirements? |
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| No |
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| An open flued gas Boiler is installed in the Kitchen with a volume of 18M3. It has a Gross rated Maximum Heat Input of 16.5kW. What size permanent ventilation provision is required for combustion? |
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| 40.0 Cm2 |
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| What is the purpose of having both High and Low levels vents installed in a compartment |
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| For Keeping the Compartment or cupboard cool |
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| In the case of an open flued appliance why is it so important that all the vents are communicating and taking air from the same source/room? |
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| To prevent Cross Ventilation |
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| An open flued appliance of net heat input 12 kW in a room ventilated directly to the outside would require how much (mm2) permanent ventilation. |
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| 2500mm2 |
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| . Where an extraction fan is sited in the same room as a gas open flued appliance, generally the addition of a further ?????. Cm2 Ventilation would combat this. |
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| 5000mm2 |
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| What effective ventilation area is adventitious air? said to equal in cm2 |
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| 35cm2 |
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| A kitchen of 12 m3 contains a flueless water heater of 8 kW net..? |
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| 50 cm2 permanent vent and an openable window are required. |
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| A room of 9 m3 without a door to outside contains a flueless cooker |
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| A 50 cm2 permanent vent and an openable window are required. |
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| . A flueless water heater of heat input 12 kW net is in a kitchen of 40 m3 |
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| the water heater is over the 11 kW limit for flueless water heaters and is therefore not permitted. This should be treated as an At Risk situation. |
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| Ventilation of rooms containing more than one appliance? |
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| Where there is more than one open flue or flueless gas appliance in a room, the overall ventilation requirement is the largest of either: ? the total ventilation requirement of all open flue space heaters, or ? the total ventilation requirement of all flueless space heaters, or ? any other individual ventilation requirement |
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| A kitchen of 18 m3 in an un renovated 1990s house contains: a) a flueless water heater of heat input 8.5 kW net b) an open flue central heating boiler of heat input 28 kW net c) an open flue gas fire of heat input 5 kW net |
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| appliance a) requires 50 cm2 and an openable window. Appliance b) requires 28 x 5 = 140 cm2 Appliance c) requires 5 x 5 = 25 cm2 Appliances b) and c) are both open flue space heaters, so add them: 140 + 25 = 165 cm2 Adventitious air is available: 165 – 35 cm2 = 130 cm2 The largest requirement is for b) + c), so the room requires a 130 cm2 air vent. An openable window is needed because there is a flueless appliance in the room. |
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| A kitchen of 20 m3 in an un renovated 1950s house contains: a) a flueless cooker b) an open flue boiler of heat input 26 kW net c) a flueless water heater of heat input 10 kW net d) an open flue gas fire of heat input 6 kW net |
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| a) does not require purpose-provided ventilation but it does require an openable window. Appliance b) requires 26 x 5 = 130 cm2 appliance c) requires 50 cm2 and an openable window. Appliance d) requires 6 x 5 = 30 cm2 Appliances b) and d) are both open flue space heaters, so add them: 130 + 30 = 160 cm2 Adventitious air is available, so 160 – 35 = 125 cm2 The largest requirement is for b) + d), so the room needs a 125 cm2 air vent. An openable window is needed because there are flueless appliances in the room. |
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| Ventilation of rooms containing more than one appliance.... |
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| the overall ventilation requirement is the largest of either: ? the total ventilation requirement of all open flue space heaters, or ? the total ventilation requirement of all flueless space heaters, or ? any other individual ventilation requirement |
