# 800 watt unit vs 900 watt unit **URL:** \ **Category:** Anova Support\ **Created:** [May 24, 2018, 11:02pm UTC](https://community.anovaculinary.com/t/800-watt-unit-vs-900-watt-unit/14731 "2018-05-24T23:02:21Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![michihenning](https://sea2.discourse-cdn.com/flex016/user_avatar/community.anovaculinary.com/michihenning/32/1655_2.png) [@michihenning](https://community.anovaculinary.com/u/michihenning)\ **Post date:** [May 25, 2018, 1:01pm UTC](https://community.anovaculinary.com/t/800-watt-unit-vs-900-watt-unit/14731/4 "2018-05-25T13:01:41Z")
> [@zqushair](#): > > Eitherway, I strongly recommend that you buy a cooler box, put a hole through the lid and use that as an insulated container. With long cooks, it will save you a lot of electricity. Not really, the electricity savings are minimal: > [@Sous Vide Koozie - anyone tried it?](https://community.anovaculinary.com/t/sous-vide-koozie-anyone-tried-it/9739/4): > > It looks nice, and neoprene is a good insulator. I’m not sure that the return on investment stacks up though. The Anova consumes 800 or 900 W when it’s heating. To keep water for the average recipe warm, I’ve seen it switch on (on average) about 20% of the time (measured by looking at my consumption meter). The actual figure will vary greatly with season and location. Let’s be ultra-pessimistic and assume that the Anova has its heater turned on 50% of the time to keep the water at the target tem… --- _[View the full topic](https://community.anovaculinary.com/t/800-watt-unit-vs-900-watt-unit/14731)._