This review is focused on the Hayward H400FDN H-Series pool heater but since all the H-Series heaters are identical this review also applies to the Hayward H150FDN and Hayward H250FDN. There’s a lot of useful information in this article to help you choose the right H-Series heater for your pool, spa or hot tub — and I’ve included some videos that show you how to install and troubleshoot your Hayward H400FDN.
I know that this will probably one of the most expensive things you’ll buy online but you’ll actually save a lot of money this way. If you buy it from your local pool dealer it will be far more expensive. Amazon makes purchasing the Hayward H400FDN easy and affordable.