ShowerPowerBoosters can be installed anywhere. Many showers are an extrad after a home was built so they will have pipes which run across a loft and down to the shower. The ShowerPowerBooster is an easy install because you have the option in all cases to fit the pumps in the loft or close to your hot water cylinder even when the pipes are in the loft.

You can fit the pumps next to the hot water cylinder even if the pipes run across the loft is your choice

If it is easier to fit a SP2B or a SP22S in the loft then fit the pumps in the loft.