Skip to content

8 simple tricks for keeping cool in summer

Kerrin Auld
  • Kerrin Auld
  • Consultant

In short

When summer turns into a scorcher, there are plenty of no-cost and low-cost ways to keep you and your home cooler. Closing curtains and blinds, staying hydrated and low, using fans wisely, opening windows strategically and a few glass treatments all help. For a longer-term fix, double-glazing and good design make a real difference year round.

Sheer cream curtains diffusing light in a living room with garden views.

Table of contents

Close curtains and blinds

Something like 30% of unwanted heat comes in your windows so keeping curtains and blinds closed will help, especially during peak sunlight hours and on windows that face the sun. Some roller blinds are designed to let you see out while still blocking those rays. Having them thermal lined is also very effective. If you’re on a budget consider only thermal lining the rooms with direct sun.

White or light coloured curtains and blinds are better at reflecting heat and light away from your home. If you have thick, dark curtains, closing them will only trap heat in the room.

Stay hydrated

Water regulates the body’s internal cooling system. Drinking a nice, cool glass of water will keep you hydrated and therefore cooler. You may have heard the old wives tale that hot drinks cool you down better. In reality all that happens is you heat up and sweat, the sweat evaporates and that’s how you cool down.

Stay low

Basic science – heat rises. If you have a multi story home it will be hotter upstairs than down.

White sheer curtains in a minimalist dining area with wooden furniture and plants.

Fans and air con

Fans don’t actually cool the air, but they create circulation that helps us feel cooler. Believe it or not, ceiling fans need to be adjusted seasonally. During summer, set it counter-clockwise and run it at high speed to blow air straight down.

Try this amazing electric fan hack for really hot days - grab a bag of ice from the petrol station and pile it up in a big bowl. Position it at an angle in front of a fan. As the ice melts the fan whips the chilled water off the top creating a delightfully cool misty spray.

To save on energy, try using the fan or dehumidifier functions on your heat pump and save the air con for only the very hottest days.

Glass treatments

There are reflective films you can put on the outside of the glass to bounce the heat away. The cooling effect is further helped along by not allowing big furniture to absorb the heat and then act as radiators.

Turn off appliances and lights

When you can of course. Obviously the fridge has to stay on, but as this generates a lot of heat you could open a window nearby to try and counter it.

BBQ as much as possible. Cooking inside only creates more heat.

Cream pleated curtains filtering morning light in a living room with a grey sofa.

Open windows

This is the obvious thing to do, of course. But you can be strategic about which windows you open for best effect. Open them on opposite sides of the house for a good through-draught.

Double-glazing

This doesn’t really fall under the ‘low-cost’ category but it’s such a good investment with benefits year round. In summer, an un-shaded single-pane window can let in a large share of a home’s accumulated heat. Double-glazing cuts down the solar heat gain coming through your windows, and you can go further again with glass that has improved thermal properties or a tint.

As the saying goes - prevention is always better than a cure. The best way to deal with solar gain in summer is to stop it in the first place. If you’re in the position of renovating or building new you can factor things into your plans that will keep you cool in summer. Like high windows to create a draught that pulls warm air out of the top of the room, good insulation, a light coloured exterior, roof overhangs, external shutters, window screens, pergolas and awnings in spots likely to get a lot of sun exposure.

Ready to find the right window furnishings for your home? Request a free in-home consultation and one of our local consultants will bring the samples to you, measure up, and give you a no-obligation quote.

Found this helpful? Share it with others…

Frequently asked questions

Do closed curtains actually keep a room cooler?

Yes — around 30% of unwanted heat comes in through windows, so keeping curtains and blinds closed during peak sun helps, especially on sun-facing windows. White or light-coloured furnishings reflect heat best; thick dark curtains, however, can trap heat in the room.

Which way should a ceiling fan turn in summer?

Counter-clockwise, run at high speed, so it blows air straight down. Fans don’t cool the air itself — they create circulation that helps you feel cooler. Ceiling fans should be adjusted seasonally.

How should I open windows to cool the house?

Be strategic — open windows on opposite sides of the house for a good through-draught, ideally in the early morning or evening when the outside air is cooler.

Is double-glazing worth it for keeping cool in summer?

It’s a bigger investment, but it pays off year round. Double-glazing reduces the solar heat gain coming through your windows, and glass with improved thermal properties or a tint reduces it further again.

Expert advice at home

We come to you, anywhere in New Zealand. Because your place is the best place to choose curtains and blinds.