Gas heaters were replaced with 14kW Mitsubishi air source heat pumps and National Grid connections upgraded at all three sites.
Disodlwyd gwresogyddion nwy gyda phympiau gwres o’r aer Mitsubishi 14kW ac uwchraddiwyd y cysylltiadau â’r Grid Cenedlaethol ym mhob un o'r tri safle.