I considered a pellet burner but decided on a GSHP. The pellet burner was an attractive option which I eventually rejected because:
a) I wasn't sure how reliable the pellet delivery mechanism would be after a few years
b) I suspect pellet costs could rise significantly when there is a significant installed base
c) I would need a sizable storage area for the pellets. Pellets are light so a significant energy store would occupy a fair volume, and anyway to be viable I would need to have delivery by the lorry load
d) I understand there is a lot of dust involved in using pellets, particularly during deliveries
The GSHP was more expensive to buy but I think in the long term it was a better choice.
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