April 2021

The Elnur HHR doesn’t use or have a boost element like other manufacturers HHR. Instead the Elnur HHR uses what we call a balancing element. The reason for this is to further save energy and running costs. In fact we can save up to a further 10% on energy usage over other HHR that just use stored overnight energy.

All HHR storage heaters are required to have at least 45% of their store remaining, when the heater has not been used during the day after a full charge. All the new types of HHR storage heaters will adjust their overnight charge according to their settings and how much is still left in their core. The Elnur HHR go a little further by also calculating how much store has been used and how long the balancing element has been on for. The Heater then decides if it’s better/cheaper to store more or less energy via the off peak charge or allow the balancing element to run for longer, while still maintaining the set temperatures.

Let me explain further….

Say the heater stored 40% of off peak and used the balancing element for 25 minutes one day. The next day it reduces the store to 30% and then using 45 minutes of balancing element. At first glance you would say this is crazy it’s storing less using off peak and using more on peak electric.

Let’s work out then how much has this actually cost, and let’s use the biggest HHR40 heater as an example. HHR40 has 3.4Kw elements off peak and 1.1Kw balancing element on peak. If the HHR40 took 100% charge then it would use 3.4(Kw) x 7 (7 hours of off peak charging) = 23.8Kwh, so 40% would be approx 9.52Kwh, 30% would be approx 7.14Kwh. Using 60 minutes (1Hr) of on peak balancing element would be 1.1Kwh, so 25 minutes would be approx 0.458Kwh, 45 minutes would be approx 0.824Kwh.

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.15 = £0.07 (rounded up), total of £0.83 for the day. Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.15 = £0.12, total of £0.69 for the day.

As you can see it is more efficient to use the Elnur HHR storage heaters with the balancing element and let the heater adjust itself.

If you’re still not convinced then let’s add 10% to the off peak and have no on peak balancing element like the other HHR.

11.9Kwh(50%) off peak x £0.08 = total of £0.95 for the day.

You can try different on peak rates if you want. Even if you’re on peak tariff is more than £0.40 per Kwh you’ll still be better off using the Elnur HHR over other HHRs.

You can try different on peak rates if you want. Even if you’re on peak tariff is more than £0.40 per Kwh you’ll still be better off using the Elnur HHR over other HHRs.

Typical other HHR usage (off peak only) 11.9Kwh(50%) off peak x £0.08 = total of £0.95 for the day.

At £0.15 per Kwh on peak

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.15 = £0.07 (rounded up), total of £0.83 for the day. Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.15 = £0.12, total of £0.69 for the day.

At £0.20 per Kwh on peak

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.20 = £0.09 (rounded up), total of £0.85 for the day. Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.20 = £0.16, total of £0.73 for the day.

At £0.25 per Kwh on peak

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.25 = £0.11 (rounded up), total of £0.87 for the day. Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.25 = £0.21, total of £0.78 for the day.

At £0.30 per Kwh on peak

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.30 = £0.14 (rounded up), total of £0.90 for the day. Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.30 = £0.25, total of £0.82 for the day.

At £0.35 per Kwh on peak

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.35 = £0.16 (rounded up), total of £0.92 for the day. Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.35 = £0.29, total of £0.86 for the day.

At £0.40 per Kwh on peak

First day = 9.52Kwh off peak x £0.08 = £0.76 plus 0.458Kwh on peak x £0.40 = £0.18 (rounded up), total of £0.94 for the day.

Second day = 7.14Kwh off peak x £0.08 = £0.57 plus 0.824Kwh on peak x £0.40 = £0.33, total of £0.90 for the day.