Fitting electric heater NOT storage.

[superthornt]

Hello,

So as a newly qualified domestic installer, I have been given a job that means getting rid of a domestic central heating system and replacing with electric heaters. Noe first thing Im going to do is upgrade the fuse board, here is the rad sizes by kw

Downstairs
1 x 2.5 kw
1 x 1.75 kw
1 x 1.0 kw
Upstairs
2 x 1.0 kw
3 x 0.5 kw

Basically, Im asking for anyones advice how they would go about running this in. Do i need to run 1 x 4mm radial to upstairs rads and 1 x 4mm for downstairs???

 

[Brightspark2]

Sounds like a plan.

Now you need to plan the rest of the circuit.

 

[i=p/u]

well depending on distance and vd and earthing sytem and installation methods your slightly out i. maybe

 

[Guest123]

Seems like an expensive to run method of heating a property.

Personally, I would be splitting them up over more than just 2 circuits to allow some to remain in use should the OCPD or RCD operate for any reason.

 

[Guitarist]

Radial to each heater imo opinion. That way, when they realise how expensive it is to heat it that way, it will be all in place to convert to eco 7.
Does your new install comply with "an efficient way of providing heating"?

 

[superthornt]

Problem is they got an oil boiler heating system but dont want it anymore. they wana have eco electric heaters which is beyond me. My guess is they cant afford the oil.

 

[DNS1]

If they've been fooled into those "eco" electric heaters tell them to steer well clear. Was an article in the paper the other day about a council who had installed a load of them a couple of years ago and are how having to rip them out and install central heating.

 

[drew35]

8.75kw of electric heaters, they had better get an LCD meter installed or a new bearing in the old meter. Why would they not use storage heaters?

 

[needasparks]

May be an idea as others have said to keep the old system in place for when they get the leccy bill as the oil would have been cheaper.

 

[peterb2428]

Because there crap also storage heaters that is- gas all the way

 

[superthornt]

Sound advice gentleman, appreciate the help.

 

[oldtimer]

Because there crap also storage heaters that is- gas all the way

Think you are missing the point Peter there is a suttle move on to get us off gas that why all these electric heaters are starting to pop up

 

[sythai]

If they've been fooled into those "eco" electric heaters tell them to steer well clear. Was an article in the paper the other day about a council who had installed a load of them a couple of years ago and are how having to rip them out and install central heating.

Any idea why....? Recently installed a load, work well, cheap to run and customer is happy

 

[needasparks]

I think it was to do with stated running power was loads more than the advertised rating, the company got fined quite a bit i think by trade descriptions

 

[sythai]

I think it was to do with stated running power was loads more than the advertised rating, the company got fined quite a bit i think by trade descriptions

I see thank you for that :icon14:

 

[Fin170]

Wood burner full of old pallets is cheaper to run than both

 

[chris murphy]

Hello,

So as a newly qualified domestic installer, I have been given a job that means getting rid of a domestic central heating system and replacing with electric heaters. Noe first thing Im going to do is upgrade the fuse board, here is the rad sizes by kw

Downstairs
1 x 2.5 kw
1 x 1.75 kw
1 x 1.0 kw
Upstairs
2 x 1.0 kw
3 x 0.5 kw

Basically, Im asking for anyones advice how they would go about running this in. Do i need to run 1 x 4mm radial to upstairs rads and 1 x 4mm for downstairs???

"Hello superthornt",

The Heat Output of these Heaters / Rads may NOT be a concern for You if you are just installing someone else`s requirements - But:


From a Heating Engineers point of view the Upstairs Heaters / `Rads` outputs seem VERY Low - I assume that one of the 0.5 KW Heaters / Rads is for a Bathroom ? - is another for a Hallway ? - with 2 X 1 KW and 1 X 0.5 KW Heaters / Rads for the Bedrooms - ?

Unless these are VERY small Rooms with just ONE Outside Wall I feel that these Calculations have been either done using the Heat Loss figures for a VERY Well Constructed and Insulated Home - to New Build Specifications - OR They have been Miscalculated.

Can I take it that the Home is NOT a `New Build Property` - regarding your mention of the existing Heating System being removed ?


As a Heating Engineer I know about Heat Loss and the Heat that needs to be produced to Heat a Room taking into consideration the losses - the Heat Outputs that You have quoted for the `Heaters` that are to be installed in some of the Rooms / areas seem VERY Low to Me.


There are various location factors to consider as well as the Room sizes / number of outside walls etc. when calculating Heat Losses for Heating a Home - or anywhere else - and that is why I would carry out a Site Survey to get the details when calculating for a Heating System - so I don`t really want to be calculating those for You on here - but I would be very sceptical of at least the Bedroom Heaters / Rads Outputs.


Although this may not be anything to do with You - the People living in the Home will probably be very cold when the Weather / Temperature changes.


I am not trying to be `funny` with You - far from it I have written this to try and be helpful.

Obviously in conjunction with the comments of the other Members on here.

Regards,

Chris - Heating Engineer

 

[Guitarist]

"Hello superthornt",

The Heat Output of these Heaters / Rads may NOT be a concern for You if you are just installing someone else`s requirements - But:


From a Heating Engineers point of view the Upstairs Heaters / `Rads` outputs seem VERY Low - I assume that one of the 0.5 KW Heaters / Rads is for a Bathroom ? - is another for a Hallway ? - with 2 X 1 KW and 1 X 0.5 KW Heaters / Rads for the Bedrooms - ?

Unless these are VERY small Rooms with just ONE Outside Wall I feel that these Calculations have been either done using the Heat Loss figures for a VERY Well Constructed and Insulated Home - to New Build Specifications - OR They have been Miscalculated.

Can I take it that the Home is NOT a `New Build Property` - regarding your mention of the existing Heating System being removed ?


As a Heating Engineer I know about Heat Loss and the Heat that needs to be produced to Heat a Room taking into consideration the losses - the Heat Outputs that You have quoted for the `Heaters` that are to be installed in some of the Rooms / areas seem VERY Low to Me.


There are various location factors to consider as well as the Room sizes / number of outside walls etc. when calculating Heat Losses for Heating a Home - or anywhere else - and that is why I would carry out a Site Survey to get the details when calculating for a Heating System - so I don`t really want to be calculating those for You on here - but I would be very sceptical of at least the Bedroom Heaters / Rads Outputs.


Although this may not be anything to do with You - the People living in the Home will probably be very cold when the Weather / Temperature changes.


I am not trying to be `funny` with You - far from it I have written this to try and be helpful.

Obviously in conjunction with the comments of the other Members on here.

Regards,

Chris - Heating Engineer

Maybe the house in in Spain

 

[superthornt]

A company called Bright Heating had done a survey for the rooms and came back with the sizes of rads needed to warm each room but quoted just under 8 grand to supply, fit and remove old rads, and change consumer board, Im working from their stats.
It is an old house, unknown cavity, and each bedroom has 2 outside walls. prob 3mx3m size room with high ceilings. The house detached.
7

 

[needasparks]

From what you say i would strongly recommend getting the heat values re-done for this job as Chris says the values you gave do sound well under what you would expect for a older house