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Homes / Domestic Sector

  • New Buildings
  • Existing Buildings

       1)     New buildings

              While constructing new building follow the basic criterion as under. These building structures will provide your building will overall electricity savings of around 15 to 20 per cent as compared to the existing home structures. Adopt these easy to go measures while planning your house and glow with health without compromising your comforts kill your electricity bills.

   Structure:

  • Cool roofing techniques should be adopted by using high reflecting coatings/materials or by terrace garden and clay pots. This can lead to 60% Energy savings.
  • Buffer spaces like storerooms, staircases should be located on eastern or western facades.
  • Keeping in view the windows there must be provision of maximum openings in order to bring more light. This will result in saving your bills of electricity caused due to lighting.
  • The design should be such that direct heat gain and glare is minimum while daylight penetration is maximized.
  • There should be more no. of windows on north and south face of the house to reduce insolation (heat & glare).
  • Size of the window plays an important role in reducing insolation, large window causes glare while small causes dark space, therefore optimize designing to create balance between solar gain and daylighting. Maintain 1:3 ratio of windows and walls.
  • For building envelop, on the external wall section use the construction material with lower overall heat gain in order to reduce energy consumption by HVAC systems.
  • Maintain an optimum building occupancy, house should be built keeping in view the no. of occupants of the house, so that overcrowding is avoided. Normal  occupancy of a building is specified by 50-60 sq ft area per person.
  • Use energy efficient appliances, install BEE star labeled ACs, fans (more than 4 star), geysers. This can further decrease your electricity bills by 15 to 20 %.
  • Use renewable energy on site such as solar water heating systems for requirement of hot water.
  • Rain water harvesting should be adopted for meeting daily water demands. It also helps increase the ground water table levels. Further the entire waste water, grey and black water generated in the building is to be treated by natural biological system i.e. use of plants with proven remediation abilities such as water hyacinth and sedimentation techniques. This treated water is used for landscaping, and flushing. This can lead to 40% savings in potable water usage.
  •  Water efficient fixtures should be used for low flow flushing purposes.

        Overall benefits you can achieve

 

LOWER MAINTENANCE COSTS -13%

LESS ENERGY USAGE 26%-50%

27% HIGER OCCUPANT SATISFACTION

LESS WATER USAGE 40%

       2)     Existing Buildings

                 Existing buildings can also be modified to conserve energy and make them green but for that we must be able to detect the problem areas which should be improved. This not only decreases your electricity bills by 20 percent but also enhance a healthy lifestyle.
These are as under:-

  • In every house storage tanks, pipelines, hot water system has to be insulated, otherwise 5 % energy goes as loss.
  • Air leakage problems should be plugged for increasing the efficiency of the HVAC systems. Avoiding this problem can increase the load over AC upto 2%.
  • If possible electric geysers should be replaced by solar water heaters, this helps in decreasing your electricity bills upto 10%
  • Hire a certified energy auditor for upgrading your home to be energy efficient
  • Use energy efficient appliances, install BEE star labeled ACs, fans (more than 4 star), geysers. This can further decrease your electricity bills by 15 to 20 %.

More than 50% Air Conditioned                                            
Built-up Area

EPI
(kwh / sqm / year)

Star Label

190-165

1 Star

 165-140

2 Star

140-115

3 Star

115-90

4 Star

Below 90

5 Star

Less than 50% Air Conditioned
Built-up Area

EPI
(kwh / sqm / year)

Star Label

80-70

1 Star

70-60

2 Star

60-50

3 Star

50-40

4 Star

Below 40

5 Star

  • Replace incandescent and other ineffective lamps with LEDs and save upto 80% electricity.
  • Reuse traditional materials like bricks and wood and avoid aluminum and vinyl fittings for renovating the house as bricks and wood have more thermal insulation i.e. do not get heated up early.
  • Plant more trees which provide shade & cooling effects. This will help to keep the building more health friendly and reduces load on our electric cooling systems.
  • Use light colored paints on the exterior walls of the home to reflect the sunlight.

(A)   Energy saving in kitchen can be done by following few measures:-

  • Keep all materials required for cooking within reach before lighting the stove.

    Avoid an idle flame by keeping all materials required for cooking within reach, before lighting the stove.

  • Use optimum quantity of water.

    The quantity of water used differs for various dishes. And even for the same dish, different housewives use varying quantities of water. Since water is extensively used in cooking, one should remember that surplus water wastes fuel.
  • Reduce the flame when boiling starts.

    When a vessel’s contents reach boiling point, a low flame is enough to keep it boiling. Addition of more heat at the boiling stage causes further evaporation of the liquid without serving any useful purpose. Hence, when water or any other liquid is boiling, reduction in the flame will reduce wastage.
  • Soak ingredients before cooking.

    Experiments have shown that soaking ingredients such as dal and rice for various intervals of time before cooking saves fuel. 250 gm of kabuli chana (chick peas) when soaked overnight in water consumed 22% less fuel as compared to the fuel required for the same quantity of unsoaked kabuli chana.
  • Shallow wide vessels save fuel.

    A visible flame touching the sides of vessel wastes fuel since it gives out heat to the surroundings. But if you cover the flame as much as possible by using a broad vessel, you will save fuel.
  • Always put a lid to prevent heat losses.

    It is a good practice to cover cooking vessels and pans with a lid, as an open vessel loses heat to the atmosphere which means a waste of fuel. A vessel of 100 sq.cm. opening, containing not water at 96°C would waste 7.2 GMs Of gas per hour.

  • Use of small burner in a LPG stove saves fuel.

    A cooking gas stove has a big burner and a small burner. The small burner consumes 6% to 10% less gas than the big burner! An experiment on cooking 250 GMs Of potatoes revealed that the small burner consumed 6.5% less gas but took 7 minutes more than the big burner.
  • Clean the burners regularly.

    It is important to/clean the burner of your gas stove regular maintenance of your stove helps you to save fuel.
  • Allow frozen food to reach room temperature before cooking.

    Cold milk, frozen meal or any other cold food-stuff from the refrigerator should not be taken straight to the cooking pot. Keep it out of the refrigerator should not be taken straight to the cooking pot. Keep it out of the refrigerator for some time before putting if on the stove. Very cold food consumes a larger amount of fuel.
  • For additional savings use ISI marked kerosene and LPG stoves.

(B) Energy saving for electrical appliances can be done by following few         measures:-

  • Close doors and windows while running the air conditioning.
  • The temperature of the air conditioner should be kept at 26°± C while 5 to 8 % savings can further be achieved with 1°C decrease in temperature.
  • Don't spend more time taking inventory every time the fridge is opened.
  • Switch off light when not required.
  • Use a table lamp instead of an overhead light when reading at a desk.
  • Replace 40W tube light by equivalent light output 36W (Slim) tube lights.
  • Use Electronic ballasts in place of conventional electromagnetic ballasts Tube Lights.
  • Replace filament lamps with compact fluorescent lamps (CFL/LED)
  • Use electronic regulators for the fans.
  • Switch off electrical appliances when not required.
  • Use Light Weight/Energy efficient fans.
  • Adopt large scale ironing. Avoid ironing one or two cloths daily.
  • Clean & Lubricate grinder parts periodically.
  • Use energy efficient motor for the grinder,
  • Use grinder to its full capacity.
  • Use Washing Machine to its full capacity.
  • Avoid using dryer in washing machines whenever possible.
  • When immersion rods are used, switch off when water is heated to the required level.
  • Switch off directional vanes provided in the air-Conditioner when not required.
  • Avoid leakage of water in taps/joints.
  • Use energy efficient water pumps.
  • Use correct size PVC Piping System, in water lines.
  • Use capacitors for water pumps, to improve power factor.
  • Avoid frequent closing and opening of refrigerator door.
  • Keep refrigerator away from the wall by atleast 200mm.
  • Use Non-Conventional Energy Sources liked Biogas, Solar water Heaters /Cookers
  • Periodical inspection of wiring may be done to defect leakage if any. Use Earth leakage circuit breakers.
  • Use correct size wires, preferably copper wires.
  • Use solar water heaters instead of electric geysers.
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