from Saniflo website
The unit, which can be floor or wall mounted, will pump up to 5 metres vertically. It can pump up to 342 litres/hour and if pumping vertically to 4 metres will pump at 156 litres/hour.
Strewth!!! What sort of condensing boiler are they designing for? I doubt that even the largest (70kW) domestic condensing boiler could EVER produce more than 5 litres an hour!
How much does it cost? Are you paying for large capacity that is completely unnecessary? I've used low-voltage pumps for this purpose, which come with a 'wall-wart' power supply. Eliminates Part P issues!!!