Is there a lag time when I turn the tap on for hot water to flow through?

Is there a lag time when I turn the tap on for hot water to flow through?

In any system there will be a lag time, especially in winter when the hot water pipes are cold.
Long lengths of pipe also cause a lag time for hot water to reach the tap.
Hot water systems have two designs – storage and continuous flow (also called instantaneous). Storage hot water systems heat and maintain warm water in their tank until it’s used. Hot water is instant but limited to the tank’s storage capacity. Continuous systems quickly heat unlimited water when you need it. It takes a little while to heat but it doesn’t use energy keeping water hot when it is not being used. 

    • Related Articles

    • It takes a while for hot water to flow through the taps, is there something wrong with my HWHP? What should I do?

      This is often an issue with plumbing rather than your hot water system.  Every hot water system has some lag time for hot water to reach the taps. This will be longer for longer pipes, i.e. the distance from the tank to the tap. Also the lag will be ...
    • Other ways of saving hot water?

      1. Take Showers Instead of Baths - An 8-10 minute shower uses 75-150 litres less than the average bath. 2. Upgrade to a Water-Efficient Showerhead - On average, showering and bathing account for 60% of a household’s water bill. So, upgrading to a ...
    • Solar hot water vs Solar PV + HWHP vs Solar PV + Electric storage or instantaneous

      Solar hot Water & Solar PV: A solar PV panel system generates electricity directly from sunlight.  Solar thermal systems (solar hot water) consist of 3 types:  1. The traditional solar panel contains copper tubes in which water is heated in sunlight ...
    • What's the most efficient hot water system?

      Choose a high-efficiency hot water heat pump or solar hot water model. It will provide the same heating with at least 60% less energy — possibly more. For running costs see also ...
    • Solar hot water or heat pump?

      Both heat pumps and solar hot water systems have low running costs. But if you’re looking for a hot water system, we recommend installing a heat pump for a number of reasons: Better use of your roof space - Solar hot water systems use up valuable ...