Bathroom Heater

[Power Ball]

HI Guys I have a customer who wants some Low voltage lights putting in his bathroom all out side the zone so no problem with them. He also want a bathroom heater on the ceiling if possible or above the door as you walk in (but not one of those round element jobs), I have googled it but can't see anything that might do. Have you got any ideas or ones you have used in the past.

Thanks

Chas

 

[wozz]

KITCHENS AND BATHROOMS - DOWNFLOW FAN HEATERS

any good?

 

[SPECIAL LOCATION]

Buy Dimplex Winterwarm WWDF20 2kW White Downflow Bathroom Heater at Argos.co.uk - Your Online Shop for Utility heaters.

From Argos

 

[Technician]

From previous threads downlighters in bathrooms should exceed

IPX4 even outside zones to prevent moisture leaving the space.

IPX55 may be more suitable unless manufacturer can give a

guarantee that they will not allow moisture to pass.

If not, some form of mechanical ventilation may be needed.

 

[Doc Hudson]

From previous threads downlighters in bathrooms should exceedIPX4 even outside zones to prevent moisture leaving the space.

IPX55 may be more suitable unless manufacturer can give a

guarantee that they will not allow moisture to pass.

If not, some form of mechanical ventilation may be needed.

I think your statement re outside zones is an individuals personal opinion not a regulation. The wiring regulations suggest IPX7 in zone 0, IPX4 in zones 1 & 2, it only refers to IPX5 where water jets are likely, eg cleaning by hoses. Building regulations do not specify any particular IP rating to my knowledge. Remember IPX4 is protection against splashing water from any direction. IPX5 would be protection against water jets from any direction such as hose pipes. I'm not convinced these are everyday occurrences in most domestic bathrooms. I did presume you meant IPX5 as IPX55? does not exist. the ratings read IP[first numeral][second numeral][additional letter][supplementary letter]. 'X' is used where that particular rating is not important. Also as building regulations require ventilation by either open window or mechanical extraction any room with a bath or shower should not be an enclosed space without any form of ventilation anyway.

Doc H.

 

[Technician]

Doc; Point taken; yes they may be other opinions on other

posts and IPX55 was an error. Some retailers I know state

that some form of ventilation may be required in some cases.

 

[wozz]

Part C Moisture protection

New building materials and associated construction methods

are altering the way in which new properties are manufactured.

There is a move towards breathable membranes for roofs;

these replace traditional bitumen coated roofi ng felt and negate

the need to provide ventilated eaves to roofs.

This material allows water vapour to permeate from the

roof area out to the surrounding environment but remains

impervious to external moisture. The material is much lighter

and allows a roof to be completed at ground level and lifted

into position on the dwelling creating a water tight environment

under which construction can continue. There is no longer a

need to provide ventilated eaves.

For this reason, the amount of moisture that can enter a

cold roof void must be controlled; therefore anything which

punctures the seal between the cold roof area and dwelling

area must be considered. Light fi ttings and loft hatches are

good examples of intrusions into the roof area that can facilitate

the passage of moisture. BS5250 which is referenced in Part

C stipulates the permitted air fl ow per luminaire (0.06m3/Hr/

m2 at a pressure of 2 pascals) for which Part L defi nes the

testing criteria and total building envelope performance. The

requirements are very demanding and care is needed to ensure

compliance.

Fireguard downlights have been designed with special seals to

inhibit the fl ow of air & moisture through the fi tting as required

by Part C of the building regulations. This has been widely

enforced since the 1st of July 2005.

 

[Doc Hudson]

This raises the question of to what extent do we apply these regulations retrospectively. Clearly new build properties should comply with all current regulations when built. But older properties do not use these building materials and do not have building inspectors or pressure testing everytime you refurbish your bathroom. I think that the relevant quote from Approved document C is this one I have copied below. (Approved documents are available from our downloads section, or free from other internet sources) All Regulations (Building, EAW89, ESQC Regs etc) - Downloads - Talk.electricianforum.co.uk... a forum with a difference.

Roofs (resistance to

damage from interstitial

condensation )

6.10 A roof will meet the requirement if it is

designed and constructed in accordance with

Clause 8.4 of BS 5250:2002141 and BS EN ISO

13788:2002142. Further guidance is given in the

BRE Report BR 262143.

6.11 The requirement will be met by the

ventilation of cold deck roofs, i.e. those roofs

where the moisture from the building can permeate

the insulation. For the purposes of health and

safety it may not always be necessary to provide

ventilation to small roofs such as those over

porches and bay windows. Although a part of

a roof which has a pitch of 70