On 29/11/2017 19:30, Steve Walker wrote:
On 29/11/2017 19:13, wrote:
On 28/11/2017 23:36, Steve Walker wrote:
On 27/11/2017 18:24, wrote:
On 27/11/2017 18:14, Iggy wrote:
replying to David, Iggy wrote:
Well, I can't disagree AT ALL with heating AND
wonderful-marvelous-is-the-bees-knees cooling. However, for a nice,
cheap,
never needs a Technician heating solution of somewhat small spaces,
is a
Halogen light bulb heater. You can do like this "Low watt space
heater EASY
BUILD" https://www.youtube.com/watch?v=OWD56H4v6yM or you can just
screw bulbs
into a bunch of sockets on a board and make it your top central
lighting.
You'd just put a tiny fan next to the bulb-field to circulate the
shed's air
for a very reasonable 500 to 600-watts. In other words, turn the
shed into a
giant Easy Bake Oven.


I must be missing something. A regular resistance heater converts
all the energy into heat, this converts the energy into heat and
light. Unless you need the light, how is a heater based on light
bulbs better than a regular resistance heater?

A conventional heater has to heat the air and heat is continuously
being lost to the environment. Spotlights (or better, the equivalent,
purely infra-red heaters) give you radiant heat directly onto your
skin. You can feel warm with them in a much cooler room and so save
energy. They are often used in factories, loading bays, etc.

SteveW

Hmm, I'd not thought of that :-( I can see the merit of I-R for
heating one side of a person but it's not much good for heating an area.

That's the point really in the places they are used. They keep the
personnel comfortable, without having to heat the whole building.

The type that work really well are the long wavelength gas fired tubes
you see in some shops / warehouses - usually high in the roof space,
they look like a thick black pipe with a reflector behind them. Being
above and far away they tend to bath you in IR rather like being out in
the the sun.

For domestic use you are usually stuck with the more traditional IR
radiant style element. Nice for directional heat like you get form a
fire, but not that good at making a space comfortable quickly. There are
also a bunch of halogen style heaters that give off quite a bit of
light. These don't really work that well IME, and are rather bright to
have in your eye line. They do heat a space slowly by convection.



--
Cheers,

John.

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