window ideas, window placing ideas, window size ideas

Introduction:

Window is a essential part of construction element. In this article, we are going to discuss about window. There are so many articles available about types, uses etc. But Here I am trying to explain about that where window could be placed? And What would be its size?

What is window:

Window plays a major role in construction and it serve as a filter to allow ventilation, aeration and light from external to internal living and conducting inner heat from inner to outer. Nowadays, Window acts as a decorating part also.

Window serves As filter

What would be the window size?

over sized window will conduct over lighting and resulting over hot. 

over light create hot and over intensity

over light create hot and over intensity

Small sized window will affect the light and air and causes health issue. So correct size of the window should be calculated and followed.

small size window create poor lighting

small size window create poor lighting

How to calculate Area of window?

Correct size of Window should be followed to transmit the correct amount of ventilation and air circulation.

Normally, Window Area should be 8% to 10% of the floor Area of that particular room.(it may living, bed, kitchen) for nominal 10’0’’ height. The range would be double if Ceiling height is double. For Example 16% to 20% for 20’0’’ high ceiling.

correct size of window makes sufficient light

correct size of window makes sufficient light

How to calculate window size?

Normally, in practice we follow 2’6’’ to 3’0’’ as sill level and 7’0’’ as lintel level.

So, height of window would be 4’0’’ tp 4’6’’( 4’0’’ as common)

sill level 3'0'', lintel level 7'0'', window height 4'0''

Suppose, If Size of living room is 20’0’’ X 20’0’’ and area will be 400 sq.ft. As per our early calculation take window area as 10% of floor area and resulting will be 40 sq.ft. We have Already height of window as 4’0’’ standard. So length of window will be (Area/height) 40 sft.

So, the size of window may be 10’0’’ X 4’0’’ or 5’0’’ X 4’0’’- 2 numbers, 2’6’’ X 4’0’’ – 4 numbers.

The following table is to describe the size of window for some common size of room

Sl.no	Size of Room	Area of Room	Area of window as 10%	Size of window	Standard size
1	10 ft X 10 ft	100 sft	10 sft	2’6’’X 4’0’’	3’0’’x4’0’’
2	10 ft X 20 ft	200 sft	20 sft	5’0’’x4’0’’	5’0’’x4’0’’
3	10ft X 16ft	160 sft	16 sft	4’0’’X4’0’’	4’0’’X4’0’’
4	11 ft X 11ft	121 sft	12.1 sft	3’0’’x4’0’’	3’0’’x4’0’’
5	20ft X 20ft	400 sft	40 sft	5’0’’X4’0’’- 2 nos	5’0’’X4’0’’- 2 nos

Where window should be fixed?

Window Should be at wall towards outer. Then only, air and light will come in. No doubt about that. But my point is that in which wall out of 4 walls of a particular room?. I mean that even though each room have 4 walls, out of which what is first choice of wall to fix a window?

First of all, please go through the following floor drawing of a small home.

home without window

Now. Time to decide that where the window should be fixed out of 4 walls of each room, kitchen, bed, living etc

window at north✔️

window at west  X

What is wrong in 1^st picture? And What is right in 2^nd picture?. Still confused?

Watch the following 3d image. You can notice some points.

sun Travel arc:

There are two sun travel arc.namely, summer arc at summer season and winter arc at winter season.
Always, sun travels from East to West. In morning from 6 am to 11.30 am East wall faces direct sun. From 11.30 pm to 12.30pm,  open terrace will receive the Direct sun light. From 12.30 pm to 6 pm West side wall only receive the direct Sunlight. you can understand by referring the below image.

sun travel arc 

At the time of 7 AM:

sun position at 7 AM

You can notice that, East side window always will get over lighting  during forenoon. At the same time, west side window gets poor lighting.

direct sun rays in home at 7 AM

If you watch the above image,in the inner side of the house east wall receive the light and west side wall get dark. Direct sun rays also entered in interior of the home.

At the time of 12 PM:

sun position at 12 PM

sun position at 12 PM

At the time of 12 pm top roof only receives the direct sun rays.

At the time of 4 PM:

sun position at 4 pm

sun position at 4 pm

West side wall always will receive over lighting during afternoon. Direct sun rays obtained in interior of the home.At that time, East side window remains dark.

North and south side window :

window at south wall

North and south side window always receives uniform lighting from 6 am to 6 pm. Because, they always not facing the sun directly. but receives the light at uniform amount.

conclusion:

Sometimes, East side window may be permitted if there is no chances. But, west side window strictly  not allowed. Because, last position of sun at that particular day always at west wall and hot remains at west wall and continues during night.

My  recommendation  to fix a window are:

•  1^st choice is North and south wall
• 2^nd choice is east wall
• There is no choice for west wall to fix a window.