Stories & Insights

How much energy can you recover?

Let's put that into numbers. At 8 litres per minute, a shower uses: 480 litres per hour. With water entering at 10°C and wastewater at 38°C, the available thermal energy...

How much energy can you recover?

Let's put that into numbers. At 8 litres per minute, a shower uses: 480 litres per hour. With water entering at 10°C and wastewater at 38°C, the available thermal energy...

Why is shower wastewater such a valuable heat s...

Shower wastewater contains a lot of thermal energy because it is still warm when it leaves the shower. Consider a typical example: Shower flow: 8 litres per minute Incoming cold...

Why is shower wastewater such a valuable heat s...

Shower wastewater contains a lot of thermal energy because it is still warm when it leaves the shower. Consider a typical example: Shower flow: 8 litres per minute Incoming cold...

Why showering uses more energy than you might think, and how shower heat recovery can almost halve it.

Why showering uses more energy than you might t...

When people think about saving energy at home, solar panels, insulation and heat pumps are often the first solutions that come to mind. But there is another significant source of...

Why showering uses more energy than you might t...

When people think about saving energy at home, solar panels, insulation and heat pumps are often the first solutions that come to mind. But there is another significant source of...

How efficient is shower heat recovery?

The performance of a shower heat exchanger is normally expressed as a heat recovery efficiency. The Hamwells Blue 21XE, for example, has a stated heat recovery efficiency of 70.6% at...

How efficient is shower heat recovery?

The performance of a shower heat exchanger is normally expressed as a heat recovery efficiency. The Hamwells Blue 21XE, for example, has a stated heat recovery efficiency of 70.6% at...

Recovered heat is not the same as energy-bill s...

There is an important distinction here. A heat recovery efficiency of 70.6% does not mean that your household energy bill will automatically be 70.6% lower. The heat exchanger recovers thermal energy....

Recovered heat is not the same as energy-bill s...

There is an important distinction here. A heat recovery efficiency of 70.6% does not mean that your household energy bill will automatically be 70.6% lower. The heat exchanger recovers thermal energy....

GROHE unveils Rapido Heat Recovery Shower System at ISH Frankfurt 2025

GROHE unveils Rapido Heat Recovery Shower Syste...

GROHE unveils Rapido Heat Recovery Shower System at ISH Frankfurt 2025 Innovative co-creation: GROHE uses latest sustainable shower technology developed by Hamwells for state of the art shower system Game-changing energy efficiency:...

GROHE unveils Rapido Heat Recovery Shower Syste...

GROHE unveils Rapido Heat Recovery Shower System at ISH Frankfurt 2025 Innovative co-creation: GROHE uses latest sustainable shower technology developed by Hamwells for state of the art shower system Game-changing energy efficiency:...