Noctua pitches its PC fans as home heating boosters — active fans beat natural convection
Home décor aficionados might frown upon the fans and colors.

Noctua appears to be attempting to break out of its PC DIY niche with a recently penned blog post about efficient home heating. In an article dubbed What is active radiator ventilation and why you should consider it? the Austrian thermal specialist claims that dotting its fans around your home (mostly on or around heat sources) is "a win-win for you and the environment." As it isn't April 1, the idea is worth a closer look, but the images it shares in the blog make us pine for the long-delayed chromax.white fan series.
Heating a home through winter is expensive. Moreover, much of Europe got used to cheap Russian gas in the years leading up to the Ukraine war. The onset of that war would have fast yet significant impacts on fossil fuel pricing, particularly gas used to heat homes and fire power stations. Fuel price pain has meant homeowners are turning down the thermostat a little more and/or seeking heating efficiencies from tech like heat pumps, better insulation, and other measures.
Noctua thinks that with the increase in popularity of heat pumps, which deliver water at generally lower temperatures, active convection has a more prominent role to play. It explains that radiators running at cooler temperatures can warm up a room more quickly with the help of active ventilation (like fans). The heat source powering your radiators will also "work less to maintain desired temperatures, cycling less frequently or at lower intensity," it says.
Active fans are a solution to common problems in modern, well-insulated homes. Fans pushing air can help minimize areas with poor airflow, which might be prone to cold spots, stagnant air, moisture buildup, or mold growth. Conversely, active ventilation is touted in old homes as a compensator for heat loss through windows and poorly insulated walls.
Naturally, Noctua touts its fans as a high-quality, quiet solution to your home heating efficiency problems. "For a typical radiator setup using 2-3 fans, the cost ranges from €50 to €105, depending on the model," it says. Adding gaskets, fan controllers, cabling, and power could up the cost per radiator to nearly €200 ($208), though, it admits.
To convince readers to invest in Noctua fans and accessories, the firm touts "an estimated 5-10% reduction in heating costs" from adding active fans to home heaters. Depending on the scale of your current heating bill, this could mean a pretty quick payback of the initial investment—if Noctua's figures are accurate.
As mentioned in the intro, though, Noctua's difficulties in developing white fans to which it is willing to put its name may hinder its acceptance throughout the home. Even if they blended into the décor a bit more, some would consider brown or black PC fans dotted around the house to look like electronic clutter, incongruous, or messy.
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This home heating efficiency post from Noctua appears to have been inspired by a scientific research paper on forced convection published last year.
Mark Tyson is a news editor at Tom's Hardware. He enjoys covering the full breadth of PC tech; from business and semiconductor design to products approaching the edge of reason.
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das_stig idea, as most radiators seem to be near windows, have a small controller with an internal battery capable of driving a couple of fans for 12 hours and recharge from a solar panel attached to window or even from the buildings own light source?Reply
(C) Me All Rights And Trademarks Reserved :sneaky: -
kyzarvs Just get a heat-driven fan like the ones people have used on their wood-burners for centuries?Reply -
Jabberwocky79 While the idea is grounded in reality, this is just stupid marketing. C'mon Noctua, what are you doing? :ROFLMAO:Reply -
Amdlova Got four akasa piranha fan 5$ un.Reply
Made a desk fan using the motherboard header (24w per channel).
Noctua want a kidney for a fan -
Sangheili112
Because a computer can heat up the room, mine does playing games with heavy graphics demandskyzarvs said:Just get a heat-driven fan like the ones people have used on their wood-burners for centuries? -
why_wolf ugh, this looks bad for Noctua. like, "we're desperate over here", bad. Considering the blow up in the custom waterloop market last year that would seem like the most obvious path for them to muscle in on. It fits perfectly with their high end market position as well.Reply
You would need the fans placed anywhere, but where the radiator is, to have any real benefit. Actively pushing the heat up and away from the radiator does nothing that convection isn't doing already. Setting up some box fans to get the whole room to circulate is what you'd want to do.
Of course that pales in comparison to fixing your insulation and air leaks. Literally hanging a sheet of plastic over your windows will help more than this. Stops air leaks and adds a poor man's 2nd or 3rd pane of window insulation. -
Catrik
Those would not work, because the temperature difference between the radiator and ambiet air is too small. It would also be very difficult to install properly because if you put the base against the radiator, the fan is not facing between the plates.kyzarvs said:Just get a heat-driven fan like the ones people have used on their wood-burners for centuries?