We don't spam, we just send out one offer every month ;). Your new boiler is protected by a no quibble guarantee which you can extend to up to 10 years. Protects the boiler against frost damage when the temperature falls below three degrees celsius, the water automatically flows out of the boiler to the outside via a discharge nozzle. People not connected to a mains supply and looking for an alternative to oil boilers. Electricity, water.