What Is It? | Plastic Fan with Coils Ask This Old House host Kevin O’Connor shows a large, plastic fan with interior coils, but what is it? By Kevin O'Connor, Host Share this story Share this on Facebook Share this on Twitter Share All sharing options Share All sharing options for: What Is It? | Plastic Fan with Coils Pinterest Email Pocket Flipboard Resources: The Solar Infra Systems Solar Air Heater is available online. Sign up for the Newsletter Get the latest This Old House news, trusted tips, tricks, and DIY Smarts projects from our experts–straight to your inbox. Thanks for signing up! Check your inbox for a welcome email. Email (required) Oops. Something went wrong. Please enter a valid email and try again. By submitting your email, you agree to our Terms and Privacy Notice. You can opt out at any time. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Subscribe