It is possible to heat with pellets without having a large hopper store connected to a boiler. There are compact pellet boilers - sometimes referred to as pellet stoves with back boilers - which can be filled manually with bags of pellets.
This can be an advantage where there is no space for a hopper store, or where pellets can only be delivered in bags anyway (e.g. because there is no access for a pellet delivery truck).
You would still want to have bulk delivery of pellets to keep the cost down, so a small storage space would be needed.
The stoves will give off a certain level of noise when operating - see the video below for an example.
You can watch our case study video 'Judith's Pellet Boiler' to see such a system in action.