refrigerant - the refrigerant number installers in Letterkenny argue about.
Two bids can look similar while assuming different refrigerant values; the cheaper one often specs down. Ask for the figure in writing and check it against the manufacturer datasheet before you sign.
Oldtown, Letterkenny Cathedral Town and Ballyraine: Year-round emergency plumbing demand in Letterkenny. Serving Letterkenny and the wider County Donegal area. Quotes via the plumberletterkenny network.