7 Climate-Smart Design Moves for Homes in Haryana

How hot does Hisar get, and when?

Design starts with the weather the house will actually face. Hisar's year has three distinct seasons, and each asks something different of the building.

1. Which side of the house should get the big windows?

The cheapest cooling decision is made on day one: put the large glass on the north and east, keep the west wall short and closed, and give the south measured openings with deep shade. A badly oriented home spends its whole life paying interest on that first mistake.

The reason is the sun's path. Morning sun on the east arrives while the air is still cool and is welcome in winter. Evening sun on the west arrives after the house has absorbed a full day of heat, and so low that no overhang stops it. The high midday sun on the south is easy to cut with a chajja, while the low winter sun still slips underneath, and north light stays even all year. It is the same orientation that Vastu favours.

2. Does a courtyard really cool a house?

The courtyard is not nostalgia; it is a machine. A shaded central court pulls hot air up and out, gives every room a second source of light, and creates a private outdoor room the family actually uses from October to March. On plots as small as 200 sq yd, even a 10×12 ft court transforms the section of the house.

It works only when it is shaded. A tall, narrow court keeps most of its floor in shadow; a wide, open one becomes a sun trap that warms every room around it. A pergola, a tree or a screen over the court, with planting or water at its base, keeps it comfortable through the afternoon.

3. How deep should a verandah or chajja be?

A metre-deep verandah in front of a wall keeps direct sun off the masonry for most of the day. The old civil-lines bungalows of Haryana got this exactly right. Thin projecting balconies do almost nothing; depth is what shades.

Depth works in proportion to height. The 2018 edition of India's residential energy code, Eco-Niwas Samhita, rated a shade by its projection factor: the depth of the overhang divided by the height it has to cover. A tall window needs a deeper chajja than a short one, and on east and west faces, where the sun comes in low, vertical fins or a jaali do the work an overhang cannot.

4. Why does the roof matter most?

Thick brick walls and roof insulation flatten the day-night temperature swing, so the house stays behind the weather instead of tracking it. A terrace with proper insulation and a reflective finish can drop the room below it by several degrees. In our experience the roof is the single highest-return surface in the entire budget.

The 2018 edition of Eco-Niwas Samhita capped the roof's thermal transmittance at 1.2 W/m²K and asked for any reflective finish, such as a light coating or broken china mosaic, to sit on top of an insulated roof rather than replace the insulation. Earth fill under a roof garden counts toward that insulation too. Plan the solar frame at the same time: Haryana has made rooftop solar compulsory on new homes above a plot-size threshold, so confirm with your sanctioning authority whether your plot is covered. Panels on a raised frame also shade the slab. At The Holiday Home, the roof hides its services entirely, with the solar panels integrated flush within insulated puff panels.

5. Where does a jaali help most?

A brick or stone jaali on the west or the street side filters harsh light into patterned shade, keeps air moving, and gives privacy without curtains. It is one of the few elements that is at once structural tradition and contemporary aesthetic.

Moving air indoors matters as much as shade. The ventilation guidance in the 2018 energy code favours openings on two walls for cross-ventilation; where a room has only one outside wall, two windows set far apart, with a ventilator high above them, move more air than a single large opening.

6. How does planting cool the plot?

A line of native trees, such as neem, jamun and amaltas, on the western boundary is a permanent, self-repairing sunscreen. Landscape drawn on the plan on day one costs almost nothing; retrofitted shade takes a decade to grow.

The ground matters too. Paving left in the sun stores heat and gives it back to the house at night, while grass, shrubs and permeable paving stay cooler and let monsoon rain soak in instead of running off.

7. How should the house work in winter and the monsoon?

Haryana punishes in June and rewards from October to March. Terraces you can dine on, courts that hold winter sun, verandahs facing the morning: a climate-smart house is not a bunker against summer, it is a calendar of places for every season.

Winter nights fall close to freezing, so bedrooms want sun on their south faces and well-sealed windows elsewhere. In the monsoon, the chajjas that shade the windows also keep rain off them; add drip edges, generous roof outlets and a plinth high enough to stay dry, and the house comes through the wettest months without stains or seepage.

Is there an energy code for homes in India?

Yes. The Bureau of Energy Efficiency launched Eco-Niwas Samhita, the energy conservation building code for residential buildings, in December 2018. Its 2018 edition limits heat gain through walls and windows to a residential envelope transmittance value of 15 W/m² in every climate zone except the cold one, caps roof transmittance at 1.2 W/m²K, and sets a minimum openable window area of 12.5 per cent of floor area in the composite climate.

The 2018 edition covered residential buildings on plots of 500 sq m or more, and BEE has since published a revised edition, ENS 2024. Either applies only where a state or city adopts it into its bye-laws, so ask your sanctioning authority which version, if any, covers your plot. The logic holds for every house whatever the rule: shaded glass, an insulated roof and windows that open. For the approvals and budget around it, see our guide to building a house in Hisar.