On Wed, 6 Dec 2017 02:43:32 -0800 (PST), whisky-dave
wrote:

snip

I'm keeping it simple for you

How kind. ;-)

After talking to my studetns yesterday I now understand that I need to make things much clearer, so nwo you're getting multi-choice questions just lioke we do here when things get complicated.

How kind ... but hey, if it helps *you* understand then I'm up for
anything. ;-)



as there are 3 labs,

Are they one airspace or separated. If the latter we only need the
information from one (as a starter).

No idea what do you mean by airspace seprated.

Really? Are the labs open plan or are they separated by a barrier of
some sort?

I have posted videos of the lab how comes you can't work it out from those.

Because I'm not your wet nurse mate.

and my office was teh only place I tested the heaters.

That's of no use re calculating the heat loss from the labs. IDGAF how
cold you are.

Yes I know, so how do the professionals calculate what to use or how to heat an aera. ?

Using the tools you have been given many times now.

A professional is someone that is paid to make these calculations and can understand both theory and practice.

But it doesn't require 'a professional', just someone with more than
one brain cell.


2) A clue as to the size of any windows and the construction of all
the (especially external) surfaces.

Large triple glazed windows

'Large' as in your mouth or ego or something different? ;-)

Large as in the inverse square of your brain capacity.

So, you don't know how to use a rule either now? Or maybe you are
physically disabled so can't reach the windows from your wheelchair?

snip

Or calculate it as from 3 weeks ago when we had NO windows.

I'm pretty sure your power supply wouldn't be up to that.

We do not have a power supply for that, we never had.

I know as the one in the lab is poor.

The heatting was suplied from a differtn building NOT in this building.

What sort of power supply would you suggest as the requirement for running labs in that the temperture should be a minuim of 16C as stated in the factories act of 1992 section 7.

A standard domestic UK spec one would be fine, where you have access
to the full voltage even under a reasonable load.

How many 2KW heaters would be needed ?
or would you prefer to quote for 1300W heaters ?

Impossible to determine until you have done the thermal calculations.

Q1
If it was caluclated that you'd need 20 2KW heaters to heat a lab to the required temperature and replaced them with 1300W heaters would you need .

A More 1300W heaters than 20

Depends on the effective output of each.

B exaclty the same number of heaters

Depends on the effective output of each.

C Less 1300W heaters

Depends on the effective output of each.

D We have no idea because we don't know if they are one airspace or separated

Or what the thermal requirements for the space is.


You have been given lists of the sorts of materials and their u values
so you could help yourself a bit.

Get it through you're thick skull I am not gas registared so can't do those things.

Where TF have I said or suggested you have to deal with the *heating*
(especially gas). All you are supposed to be doing so far is working
out the heat loss.

that was the link that was posted, did you not check that link ?

The link I posted? If yes then yes, of course, that's why I posted it!
So, what you have done is taken a selected word or sentence from that,
determined that you have to be Gas Safe registered (or somesuch) and
discarded the bit that was very pertinent.

Cheers, T i m