Do Thermal Curtains Really Work?
Curtains, particularly thermal lined ones, can reduce heat loss by as much as 60%, depending on the type of windows your home is fitted with. The key to ensuring you get the most out of your curtains is in understanding exactly how heat is lost, and how the use of thermal lined curtains can prevent this.
Understanding the physics: You know the old saying that hot air rises? Well, during cold weather that is exactly what happens, and something called the reverse chimney effect comes into play.
It is widely accepted that cold air is denser, and therefore heavier, than warm air. When it’s cold outside the air close to the window is cooled and sinks down (due to its density increasing with the temperature change). When the cooled air sinks it’s replaced by warmer air from other parts of the room.
As you can imagine, this then creates a circulating current, taking all of your warm air and replacing it with cool air. And just like that, you have lost most of your heat, not just near the window, but in the entire room.
If your curtains are not fitted correctly they form a channel between the window and the curtain, creating a space for the cooled air to sit and increasing the effect of the reverse chimney. The most important aspect to note is that it is the power of each factor combined, which decreases heat loss. No single factor works in isolation.
Keep reading: www.curtainclean.co.nz...
Brain Teaser of the Day 🧠✨ Can You Solve It? 🤔💬
Make a hearty dish. Take just half a minute. Add four parts of kestrel. Then just add one. What have you made?
(Trev from Silverdale kindly provided this head-scratcher ... thanks, Trev!)
Do you think you know the answer? Simply 'Like' this post and we'll post the answer in the comments below at 2pm on the day!
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Have you got New Zealand's best shed? Show us and win!
Once again, Resene and NZ Gardener are on the hunt for New Zealand’s best shed! Send in the photos and the stories behind your man caves, she sheds, clever upcycled spaces, potty potting sheds and colourful chicken coops. The Resene Shed of the Year 2026 winner receives $1000 Resene ColorShop voucher, a $908 large Vegepod Starter Pack and a one-year subscription to NZ Gardener. To enter, tell us in writing (no more than 500 words) why your garden shed is New Zealand’s best, and send up to five high-quality photos by email to mailbox@nzgardener.co.nz. Entries close February 23, 2026.
Poll: Are you a Te Huia fan?
All three Hamilton MPs appear to be united behind the retention of the Te Huia passenger rail service between Hamilton and Auckland, as well as potentially expanding it to Tauranga.
But whether Hamilton East’s Ryan Hamilton, Hamilton West’s Tama Potaka and soon-to-be Labour list MP Georgie Dansey have the combined power to shunt transport minister Chris Bishop and Prime Minister Christopher Luxon onto their line of thinking remains to be seen.
Are you a Te Huia fan? Tell us more in the comments (adding NFP if you don't want your words used in print).
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80.7% Yes
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19.3% No
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