-- e.g. it lights up and warms the water only as you need it. A small investment to stop you using gas 24/7. How do you save money on your bills? Ever had a huge utility bill? Tell us how you cut the cost back on it below. Leave a comment Follow this conversation You will be emailed when any additional comments are approved by the moderator. You are only subscribing to comments made to this article. You may unsubscribe via the link provided on notification emails.