Thermometer in sand at the beach.
Research report
18 February 2020

4 ways to cool your home in summer

Rising temperatures got you into a sweat? We explore four cool-down options for effectiveness and cost-efficiency.

Member comments

Get access to comment

Megan C.
24 Mar 2020
Consumer, you can do better!

I'm looking at Consumer for information on fans. This article is the only thing I've founds far and it is useful, but it would be improved with a link to Consumer's assessment of fans or any comment that tests have not been done.

Loraine H.
17 Jul 2020
A bewildering array

Help. Me Too. We're installing fans in our new build and I've studied every article I can on sizes, motors, shapes, construction, speed, etc., and visited lighting shops where you can't really tell which are the quietest as they're hanging from a shop ceiling not in a home environment. It would be sooooooo helpful to read reviews and see brand recommendations.

Chris O.
22 Feb 2020
Roof colour

Not for nothing are traditional Mediterranean houses white; they reflect the heat. On a nice hot day the sun hits your roof with energy of about 1000 watts per square meter. A white roof will reflect most of it, a dark or black roof with absorb most of it. In other words a black roof on a typical 150 sq meter house absorbs about 150 Kw, or 200 horsepower. This is a HUGE amount of energy; some is re-radiated, but a lot is able to make it's way thru the insulation to the inside of the house. The insulation only slows it down; it does not stop all of it. So the first step to a cooler house is to paint your roof with a high reflectivity (very light coloured or white) paint. It can also have a helpful additive that reflects Infra-red rays to keep even cooler. Try putting your hand on various coloured cars on a hot day and you will quickly see what I mean! Cheers! Chris

Robert L.
22 Feb 2020
Exhaust fans really work.

We installed a fan in our attic access hatch which blows up into the attic. Our roof is concrete tiles so not totally airtight. In the evening we turn on the fan and close all of the windows except for the one over our bed. The fan draws the cooler outside air in over our bed and also forces the hot air out of the attic. (Too many New Zealand attic spaces are almost airtight and so the heat built up during the day keeps the house too warm at night.)