Exhaust fans are basically just large holes in your ceiling. Most homes have exhaust fans; probably in the bathroom, en-suite, toilets, laundry and kitchen. If those exhaust fans are in the conditioned space (the heated and cooled area) of the home they need to be attended to. Left untreated, all your cosy warmed air will be sucked out through your exhaust fans in winter. And in summer, all that extreme summer heat building up in your attic space will come straight down through your exhaust fans into your home.
Some estimates indicate that up to 30% of your heating/cooling can be leaving your home via these energy thieves!
How to Draught Seal an Exhaust Fan
The simplest way to treat exhaust fans is to fit a Draftstoppa over them. A Draft Stoppa is an Australian designed and manufactured device with balanced blades that sit over the top of your exhaust fan. Under normal circumstances, gravity holds the blades shut. When the fan is switched on, the airflow tips the blades up, allowing the steam and odours to be extracted from your home by the fan. When the fan is switched off, the blades just naturally close on their own. So what that means is, with a DraftStoppa installed above your exhaust fan, the winter heating (and summer cooling) in your home is going to stay in there much much longer than before.
In most cases, this is the best treatment for regular exhaust fans fitted into a ceiling where you have access to the attic space.
How DraftSoppa Work in Summer and Winter
How to Draught Seal a 3-in-1 Exhaust Fan
Until July 2026, there was a method of treating a 3-in-1 fan with an adapter plate and adding a DraftStoppa on top of that.
Due to a change in the input material that manufactures Draftstoppa, this option is no longer available.
At the moment, the only option is to replace the fan if you wish to draught proof it. 🙁 yes, that makes us sad too!However, if you are interested in draught proofing a 3-in-1 heat / lamp / fan and not replacing it, please contact us at www.ecoMasterStore.com.au using the CHAT button. We are running a register of people interested in a 3-in-1 solution and will respond as soon as there is resupply or an alternative solution.
What’s Next?
We hope this article has helped you learn how to use simple ways to save on your utility bill. This in turn will help you on your energy and thermal efficiency retrofit journey to make your home more comfortable all year round, and reduce your costs and carbon emissions.
Next, explore other projects on how to save energy
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