Commercial heat pump installers UK (2 figures)

Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2).

3 of the 10 named sources that could be read published a usable figure; 7 published none and are recorded as not published, never filled in; 0 could not be read (blocked, dead or unreachable) and count nowhere.

The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in count (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 25 candidate sentence(s) were refused by a reviewer with the reason recorded.

The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): the join no register publishes: the MCS certified-installer roster (which stops at 45kWth, or 70kWth across multiple units) against the F-gas COMPANY registers, which is where the competence for larger commercial plant actually sits - so a count per region of firms certified for a domestic heat pump, firms certified to handle the refrigerant in commercial plant, and the firms in BOTH, which is the real supply of installers for this buyer.

Each firm's own commercial page is then read for the capacity band it states, giving coverage per region per capacity band and the change in that supply between reads

25 candidate sentences on these pages were refused by a reviewer; each refusal and its reason is recorded in the review ledger.