The recovery time of a water heater, which is how long it takes for water to heat up after it has been exhausted from electric water heaters, is something we get a lot of questions about.

We have demonstrated 3 of the most common wattage types of water heater, and included heating recovery times for capacities from 5L up to 120L for each. The temperature rise used in our table is 50°C, for example from 10°C to 60°C.

These times do not allow for heat loss during the heating process. Any external factors like insulation and ambient temperature should be taken into account when using this table because they also affect the recovery time.
Recovery time for water heaters

For example, if you were to use one of our smallest water heaters, the Hyco Handyflow, you can use the table to work out how long it would take to fill up completely. The wattage of the heater is 2kW, and the capacity is 5L, which by using some maths (and the table) you get the answer of 9 minutes as the recovery time.

If you were using a larger model like the Heatrae Sadia Premier Plus PP120E 120L Direct Cylinder, you almost certainly wouldn't need to know how long it would take to recover all of the water in one use. A good length shower roughly uses 35L of water, leaving the PP120E with 85L left. Knowing that the PP120E has 6kW of power, you can expect the water heater to have a recovery time of around the 20 minute mark.

If you still have unanswered questions about water heaters regarding their recovery time or any other, please give us a call on 01934 253600 and we will be happy to help!