The body may be a complex biological system but thermoregulation and
factors associated with it still depend on principles of physics in
order to operate.
Of course in your case this may be different, since you are able to
travel through time etc.
I can't (yes, I suppose I can actually) believe yu wrote that.
What pray, is physics all about of not such things as the rate of cooling?
I know you have no education, but shouldn't that make you keep your big
mouth shut rather than jumping in and getting both feet stuck up your arse?
You have to larf really. He despies education because he has none. He
talks about things as if he understood them, when he doesn't. He even
believes in Nu Laber drivel.
He is the perfect model of a modern political society.
Sort of teh brash self confidence of teh Thatcher generation with teh
ideoligical propaganda of Nu Laber all in one pakage.
A Little Englander to the core.
He has a Bachelor of Science in mechanical engineering and majored in
HVAC. Your qualifications are what exactly?
If you think it is inaccurate please explain how the surfaces in a
room can have a temperature greater than the air temperature with a
blown air system.
To never more than the air temperature and for exterior walls usually
I don't think you really understand it at all. How does insulation
I can certainly see that.
I agree, it does matter quite a lot doesn't it.
I see, you have no idea if you will be returning to the house at all,
if it will be at 10:00, 13:00, 17:00, 20:00. Each day is totally new
- some you are in all day - others out day and night. I suppose
being an emergency plumber does have its down side.
Do the sums. The difference is not terrible great.
That doesn't leave much else to make a living with.
If I understood what you were trying to say I might be able to
Only in catalogue land. The great advantage of slow reaction systems
is the controls can be really simple _if_ the design is right in the
first place. If on the other hand the designer doesn't believe in
physics then I agree more complex controls will compensate to some
extent for the basic design errors they will make.
I have never had to add to the heating but have certainly had one or
two days in the year where we have opened a window or two. It
doesn't detract from the overall comfort of the system for the
remaining 363 days of the year.
It s been a "fad" for the last 15 years at least. (actually the last
2000 odd to be more precise)
And you have experienced ?
An assortment of far better qualified people than you including
engineers (not fitters) from the manufacturers have said it is well
designed and installed.
I was suggesting a more appropriate heating system for people who
cannot add 3 to another number and come up with the correct answer.
"Peter Parry" wrote
| >I needed heat ASAP when I walked in, not having the heating system
| >needlessly on just in case. That is wasteful.
| I see, you have no idea if you will be returning to the house at all,
| if it will be at 10:00, 13:00, 17:00, 20:00. Each day is totally new
| - some you are in all day - others out day and night. I suppose
| being an emergency plumber does have its down side.
But an emergency plumber could afford to run the heating all day, the rates
So you agree that with blown air systems the surface temperature of
interior surfaces will always be equal to or below air temperature?
Mean radiant temperature is simply the area weighted mean
temperature of all the objects surrounding the body. It will be
positive when surrounding objects are warmer than the average skin
temperature and negative when they are colder. It follows that hot
air systems, which cannot produce surface temperatures higher than
the air temperature will therefore require higher, not lower,
temperatures than radiant systems to achieve similar levels of
comfort. Radiant heat has a high MRT. Hot air has a lower MRT, it is
It is simply basic physics and physiology, nothing magic or
complicated about it.
no - which is why fancy controls are not usually needed.
If he doesn't understand the physics of heat loss and gain how then
does he design it?
Of course - because developers want the cheapest quickest and
simplest systems they can stuff in their little boxes. Quality is
not an issue.
Most of my houses were not army houses.
and never lived with the consequences of any, like most plumbers.
If you care to let us know your qualifications and experience I'll
compare them for you. I'm interested to know you consider yourself
to be better experienced and qualified in these matters than the
manufacturers senior designer is.
wrote in message> >> >> With blown air systems the radiant temperature of all surfaces must
That is obvious. Once warmed up, equal to.
Not quite right. Some surfaces reflect radiant heat and may not be warm at
all. This is where MRT is confusing. It is merely not just surface
temperatures of objects.
< snip misunderstanding of MRT and forced air.
It is not totally complete and reliable.
You haven't a clue soldier boy.
Oh my God. Stop reading those How Things Work books.
So you said/implied.
If UFH sells they will put it in.
Not a plumber soldier boy.
No thanks soldier boy. You don't know enough.
Balls!! It was not!!!
Checked by AVG anti-virus system (http://www.grisoft.com ).
Version: 6.0.507 / Virus Database: 304 - Release Date: 04/08/2003
Lets see If I've got this right, you of indeterminate, indeed if any,
education training or experience wish us to believe that you know
more than the senior designer from the manufacturers of the equipment
installed and a number of qualified experienced heating engineers
(two of whom were M Eng Chartered Building Services Engineers, both
FCIBSE). These people spent a considerable amount of time working on
the installation yet you, who have never seen it, know more about it
than they do ?
This seems a bit improbable wouldn't you agree?
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