Test Set 2 Notes
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DHD20170217

 1) 15 different Loop meters were reporting in 2017/01.

    Approximately 8 or 9 of those also seem to have plausible amounts
    of OpenTRV data present from weekly monitoring notes
    (before detailed data examination).

 2) Property N has reported some use of secondary heating when very cold
    and may need to be excluded.

 3) Property S has only one valve fitted which would depress any savings ratio;
    note also that in any property where not all valves are OpenTRV
    the same effect (to reduce apparent efficacy) may be seen.

    Property S2 also has a single valve fitted.  It is also running RC2b code
    with slightly less good energy savings.

 4) Taking just the Loop (and HDD15.5) data from March 2016 to Jan 2017,
    17 homes (including N and S) pass the basic filtering to reach
    20_basicFilteredStatsOut.csv.

    Restricting the Loop data to be from October 2016 onwards yields
    9 homes (including N and S) that pass the same basic filtering.

    (This does not take account of availability of control/normal
    logging data from the OpenTRV valves.)