Dimplex LPP050 Instrucciones de operaciones descargar pdf (Pagina 10)

Dimplex Heatbook

A guide to heating

What is heat? The human body

as a walking heat machine

Ever felt ‘under the weather’?

It’s a fact that weather has short

and long term effects on our bodies.

We’re very good at losing heat but

not quite so efﬁcient at retaining it.

We all react differently to weather

and temperature variations, and very

young, fragile or older people will be

more susceptible than most, with

women generally having a higher

level of sensitivity than men.

Cold weather and winter affects

the death rate – during the winter,

there are typically 25,000 more

deaths in the UK than at other

times in the year, directly attributed

to low temperatures.

The most serious risk, particularly for

older people and vulnerable groups,

is hypothermia, that can just as easily

happen in a poorly heated home as it

can to polar explorers. Even mildly cool

indoor temperatures of 15.5°C can trigger

hypothermia in older people which

manifests as confusion, slurred speech,

loss of complex motor skills and if the

body core temperature drops below 34°C,

the effects become life threatening.

Many older people and/or those in fuel

poverty may also be anxious about using

heating to keep themselves warm during

the winter, which is why it’s important to

ensure entitlements such as winter fuel

payments are claimed, insulation

measures have been adopted, and that

the heating system is as controllable

and energy efﬁcient as possible.

What is the difference between direct

acting and storage/off-peak heating?

There are two types of electric heating

appliances. A direct acting appliance

provides almost ‘instant’ heat, rapidly

heating up and cooling down.

Panel heaters, convector heaters,

fan heaters and radiant heaters all

fall into this category – providing heat

only for the period during which

they are energised.

Storage heaters are designed to take

advantage of the off-peak electricity

tariffs under which electricity is supplied

at a lower price for a selected number

of hours in a 24 hour period, thereby

charging the product with heat which

is stored for slow release over a far

longer period.

Radiant heat generally gives the greatest feeling of

comfort. It’s like the warmth from the sun or the warmth

when you hold your hands in front of a ﬁre or radiator in

the winter. The air itself is not heated directly and the rays

of energy travel in straight lines, only converting to heat

when the rays strike and are absorbed by the receiving

body. If you cannot see the radiant heat source, you

cannot feel it, but it needs no medium to carry it.

Convected heat is carried around the room in the form

of heated air. When air is heated it expands, becoming

dense. The heavier, cooler air around the heater, under the

force of gravity, displaces the lighter air upwards. As the

heated air rises, it diffuses some of its heat, thus warming

up air which is at some distance from the heat source.

The hotter the initial heat source, the further the convection

current will ﬂow before diffusing into the surrounding air.

Conducted heat travels through solid objects – heat a bar of iron at one end

and gradually the other end will become hot. Even using the best materials

for conduction, it is still a relatively slow method of transmitting heat and plays

only a small part in the practical provision of warmth.

How do different types of heating affect us?

While we all produce our own heat of about 120W per hour (equivalent to two 60W light bulbs), we need some extra help!

After 60 our ability to produce heat declines, and this is why older people are more vulnerable to cold.

Heat is transmitted in three ways: conduction, convection and radiation. The optimum mix for human comfort is a blend

of 80% convected and 20% radiant from a heating appliance.

CONVECTOR HEATER

RPX RADIANT PANEL HEATER

CONDUCTION HEAT

CONVECTOR HEATER

RPX RADIANT PANEL HEATER

CONDUCTION HEAT

CONVECTOR HEATER

RPX RADIANT PANEL HEATER

CONDUCTION HEAT

A guide to heating

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 103 104

Comentarios a estos manuales

Sin comentarios

Dimplex LPP050 Instrucciones de operaciones Pagina 10

Comentarios a estos manuales

Relacionado con productos y manuales para Calentadores espaciales Dimplex LPP050