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Homes & Gardens
Homes & Gardens
Punteha van Terheyden

The 66°F Heating Standard Is Out: HVAC Pro Reveals the Optimal, Planet-Friendly Temperature Setting for Your Home

Josh Mitchell Amazon
An open plan kitchen diner, with just a corner of a kitchen cabinet in view with green subway splashback tiling. Front and center is a patterned upholstered armchair in blue and cream, with bobbin wood feature. In the background there is a black radiator visible, as well as a mid-century five-drawer cabinet.

For many years, the expert advice has been to keep your home at 66°F (19°C) but the trouble is that nowadays, many modern homes are not built for that.

It’s a number that’s been repeated from decades-old advice focused on energy savings, our HVAC pro reveals. And in 2025, it no longer holds up when you consider how modern housing and construction materials behave, how we use our home, and how HVAC systems are sized and controlled.

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