When choosing a shower for your bathroom there are many things to consider, the 3 types of showers normally installed in bathrooms in Surrey are; Power showers, Electric shower and thermostatic mixer showers.
The term powershower normally refers to showers with inbuilt pumps which get water fed from a hot water cylinder and cold water tank directly to the shower and then pumped out of the shower head. Powershowers are a good idea when you don't have space to install a pump in your airing cupboard or don't have the correct cables accesable to install an electric shower of the cold water mains..Power showers are genurally more expensive to purchase than electric showers but normally cheaper to install as they don't need large cables like electric showers require.
Electric showers are genurally quite cheap to buy compared to powershowers but can cost considerably more. Electric showers normally require a cable which can take a 9.5kw load of electricity to heat the water adequately. This may mean you will need a new consumer unit or a new electrical cable from the consumer unit to your shower. The job turns from being a plumbing job into an electrical job as well which means you will need 2 seperate tradesman to complete the task which can push the total cost up considerably.
Thermostatic mixer showers can either be installed with a pump in the airing cupboard, gravity fed from the cold water tank or fed by mains pressure from a megaflow or combination boiler. If your existing system has a unvented cylinder (for example megaflow) or a combination boiler then it is not possible to connect a power shower as you are not allowed to pump water directly off the mains. Themostatic mixer showers are normally the best option in a modern bathroom as powershowers and electric type showers can look quite bulky and generally cant be recessed into the wall like mixer showers can.
Showers I would recommend include mira, aqualisa and also trevi, if your after a budget electric shower then triton have a large range at very good prices.
If you have any queries regarding choosing the correct shower for your property please dont hesitate to contact me.