Cyfnod ad-dalu a adroddwyd ar gyfer y pympiau gwres hynny, ar y mwyaf

2 flynedd2024-26ffynhonnellhyder canolig

Y fferm, fel yr adroddwyd. ‘Llai na dwy flynedd’: terfyn uchaf, nid mesuriad.

The Guardian (from Canary Media), 'It bloody works': why the world's oldest cheddar-maker uses a 'milk-source' heat pump, 17 September 2026'the payback on its heat pumps is less than two years'