Module 18 Domestic Space Heaters Flashcards

1
Q

Name the four common types of gas heaters

A
  1. Radiant
  2. Live Fuel Effect (LFE)
  3. Decorative Fuel Effect (DFE)
  4. Flueless
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2
Q

For a radiant gas fire what flue size and ventilation requirements are typically required?

A

Flue – >125mm across
Vent - <7kW usually 0
>7kw – 5cm2 per kW

Don’t forget to factor in adventitious air!

Plus some are R/S

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3
Q

For a LFE gas fire what flue size and ventilation requirements are typically required?

A

Flue – >125mm across
Vent - <7kW usually 0
>7kw – 5cm2 per kW

Don’t forget to factor in adventitious air!

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4
Q

For a DFE gas fire what flue size and ventilation requirements are typically required?

A

Flue - >175mm across
Vent - >100cm2

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5
Q

For a flueless gas fire what flue size and ventilation requirements are typically required?

A

For a flueless gas fire what flue size and ventilation requirements are typically required?

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6
Q

What is the difference between a simplex and a duplex burner?

A

Simplex – single injector, Simplex tap
Duplex – two injectors, Duplex tap (more flexibility)

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7
Q

In modern gas fires the permanent pilot has often been replaced with what sort of ignition mechanism?

A

Piezo ignition

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8
Q

For gas fires, other than DFEs, how long can FSDs take to shut down?

A

180 seconds

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9
Q

On modern gas fires what is the most common type of FSD?

A

Thermo-electric valve
(electro-magnetic unit connected via thermocouple to pilot burner assembly)

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10
Q

What does an atmospheric sensing device (ASD) do?

A

If oxygen levels fall the flame lifts from the thermocouple unit and the unit shuts down

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11
Q

What type of gas fire does the image depicit?

M18/p12

A

Room sealed radiant convector fire

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12
Q

Flueless gas fires – how to they avoid poisoning people?

A

Catalytic convertor on the flue

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13
Q

What type of gas fires can be installed in Bath/shower rooms?

A

Room sealed – restricted locations

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14
Q

Can an O/F gas fire be installed in a bathroom?

A

No

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15
Q

What type of gas fires can be installed in private garages?

a) Flueless
b) O/F
c) R/S
d) b + c
e) None of the above

A

d) b+c

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16
Q

If you install a gas fire and boiler in a bedroom do you factor in the combined kW or just each kW when choosing between an O/F and a R/S

A

It is the combined value. >14kW Gross then it must be R/S

17
Q

If there is a gas fire in the bedroom what are the rules?

a) None
b) >14kW gross – R/S
c) <14kW gross – O/F
d) <14kW gross – O/F + ASD
e) b+d

A

e) b+d

18
Q

A room containing a flueless space heater – should there be an opening window or not?

A

Yes there should or an equivalent e.g. fixed air vent

19
Q

If a greenhouse heating exceeds 2.7kW (net) is additional ventilation required?

A

Yes - one high, one low, 39cm2 per kW in excess of 2.7!

20
Q

Name two key issues when installing a gas fire in a conservatory on a brick wall and concrete floor.

A

Condensation
Carbon monoxide alarm

21
Q

What is the usual ventilation requirement for a DFE up to 20kW in a room?

A

100cm2

22
Q

What are the usual ventilation requirements for two DFEs, up to 20kW in a room?

A

235cm2 (100+100+35 adventitious air for the 2nd DFE)

23
Q

What are the usual ventilation requirements for a DFE and other types of appliances in a room

A

100cm2 for the DFE + the greatest of:

1) All O/F space heaters – 5cms/kW(net)
2) Total flueless space heating requirement e.g. hall convector heater
3) Largest O/F non space heater 5cm2/kW(net) e.g. water heater

24
Q

What are the usual ventilation requirements for a DFE and other types of appliances in a through room with two flues

A

100cm2 for the DFE + the greatest of:

1) All O/F space heaters >7kW = 5cms/kW(net)
2) Total flueless space heating requirement e.g. hall convector heater
3) Individual flueless “other” appliances
4) Largest O/F non space heater >7kW =5cm2/kW(net) e.g. water heater

25
Q

What are the usual ventilation requirements for two DFE and other types of appliances in a through room with two flues

A

235cm2 for the DFEs + the greatest of:

1) All O/F space heaters 5cms/kW(net)
2) Total flueless space heating requirement e.g. hall convector heater
3) Individual flueless “other” appliances
4) Largest O/F non space heater 5cm2/kW(net) e.g. water heater