This is a matter of personal choice and what one hopes to achieve.
LIGHT, VIEWS, AND VISABILITY
WARMTH
If there are radiators under the blinds, attention may need to be paid to their position in relation to hot air flows from the heating units. Downward slanting may channel hot air out from the room and into the window area, whereas upward slanting will retain more of the warm air circulation within the room.
APPEARANCE
Of course, if the venetian blinds have just one attractive surface, many would tilt the blinds so that the attractive surface is innermost to some degree. In most cases this would mean tilting them downwards, with the upper surfaces facing the room.
SAFETY/SECURITY/PRIVACY
If you have windows that are on the bottom floor or have windows that can be seen by neighbors... tilt the blinds so that anyone who may try to peak in will only see the ceiling. This direction is very useful for any time of the year anyway.
The correct way is to tilt the slats down, however the slats can be tilt either way provide adequate filtering of light.
Close the blinds (with the slats in an up position) as tightly as possible. This will both reflect light and heat away from your house and create a pocket of air between your window and blinds that will serve as an excellent insulator.
The origins of Venetian blinds goes back to ancient times. The early Egyptians attached reeds in columns and hung them over their windows, and the Chinese used bamboos in a similar way. Eventually, such window accessories were in wide use in the Middle and Far East.
lightly vacuum and then pass slightly damp cloth towel with a little bit of pinesol.
Venetian Way
The best way to clean window blinds depends on which type of blinds one has and how much buildup they have. If the buildup is minimal, simply dusting them or taking a lightly damp cloth to them will do. For fabric or vinyl blinds, one could use a dry sponge. For wood blinds a small amount of water may be used. If the blinds are metal, remove them and clean them outside.
Wood is normally not hypoallergenic. If you are looking for blinds that are then faux wood blinds would not be the way to go. Try poly vinyl shutters.
It's the new modern way to decorate blinds for your home. You can customize your blinds instead of buying the traditional ones that everyone else has.
Because the earth is on a tilt, when it's summer, your side of the earth is on a tilt towards the sun. When it's winter, the earth is on the other side of the sun, but it's still tilting the same way, so your side of the earth is tilting away.
Because the earth is on a tilt, when it's summer, your side of the earth is on a tilt towards the sun. When it's winter, the earth is on the other side of the sun, but it's still tilting the same way, so your side of the earth is tilting away.
Assume your in the northern hemisphereThe earths rotational axis remains parallel throughout the year, winter is when the top of the axis is at full tilt away from the sun, summer is full tilt towards( half a year later)
You can trim your vinyl blinds, provied you do not spoil the mechanism. Also important to note that it is one way action and can not be reversed.