diff --git a/src/server/test/web/readingsBarGroupFlow.js b/src/server/test/web/readingsBarGroupFlow.js
index c87a8df87..2a9965740 100644
--- a/src/server/test/web/readingsBarGroupFlow.js
+++ b/src/server/test/web/readingsBarGroupFlow.js
@@ -112,8 +112,96 @@ mocha.describe('readings API', () => {
                     expectReadingToEqualExpected(res, expected, GROUP_ID);
                 });
 
-                // Add BG16 here
-
+                mocha.it('BG16: should have daily points for 15 + 20 minute reading intervals and flow units with +-inf start/end time & thing as thing where rate is 36', async () => {
+                    const unitDataThing = [
+                        {
+                            // u14
+                            name: "Thing_36",
+                            identifier: "",
+                            unitRepresent: Unit.unitRepresentType.FLOW,
+                            secInRate: 36,
+                            typeOfUnit: Unit.unitType.METER,
+                            suffix: "",
+                            displayable: Unit.displayableType.NONE,
+                            preferredDisplay: false,
+                            note: "special unit"
+                        },
+                        {
+                            // u15
+                            name: "thing unit",
+                            identifier: "",
+                            unitRepresent: Unit.unitRepresentType.FLOW,
+                            secInRate: 3600,
+                            typeOfUnit: Unit.unitType.UNIT,
+                            suffix: "",
+                            displayable: Unit.displayableType.ALL,
+                            preferredDisplay: false,
+                            note: "special unit"
+                         }
+                    ];
+                    const conversionDataThing = [
+                        {
+                            // c15
+                            sourceName: "Thing_36",
+                            destinationName: "thing unit",
+                            bidirectional: false,
+                            slope: 1,
+                            intercept: 0,
+                            note: "Thing_36 → thing unit"
+                         }
+                    ];
+                    const meterDataThingGroups = [
+                        {
+                            name: 'Thing_36 thing unit',
+                            unit: 'Thing_36',
+                            defaultGraphicUnit: 'thing unit',
+                            displayable: true,
+                            gps: undefined,
+                            note: 'special meter',
+                            file: 'test/web/readingsData/readings_ri_15_days_75.csv',
+                            deleteFile: false,
+                            readingFrequency: '15 minutes',
+                            id: METER_ID
+                        },
+                        {
+                            name: 'Thing_36 Other',
+                            unit: 'Thing_36',
+                            defaultGraphicUnit: 'thing unit',
+                            displayable: true, 
+                            gps: undefined,
+                            note: 'special meter',
+                            file: 'test/web/readingsData/readings_ri_20_days_75.csv',
+                            deleteFile: false,
+                            readingFrequency: '20 minutes',
+                            id: (METER_ID + 1)
+                        }
+                    ];
+                    const groupThing = [
+                        {
+                            id: GROUP_ID,
+                            name: 'Thing_36 thing unit + Thing_36 Other',
+                            displayable: true,
+                            note: 'special group',
+                            defaultGraphicUnit: 'thing unit',
+                            childMeters: ['Thing_36 thing unit', 'Thing_36 Other'],
+                            childGroups: [], 
+                        }
+                    ]
+                    //load data into database
+                    await prepareTest(unitDataThing, conversionDataThing, meterDataThingGroups, groupThing);
+                    //get unit ID since the DB could use any value.
+                    const unitId = await getUnitId('thing unit');
+                    // Load the expected response data from the corresponding csv file
+                    const expected = await parseExpectedCsv('src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_Thing36_gu_thing_st_-inf_et_inf_bd_13.csv');
+                    // Create a request to the API for unbounded reading times and save the response
+                    const res = await chai.request(app).get(`/api/unitReadings/bar/groups/${GROUP_ID}`)
+                        .query({ 
+                            timeInterval: ETERNITY.toString(), 
+                            barWidthDays: '13',
+                            graphicUnitId: unitId });
+                    // Check that the API reading is equal to what it is expected to equal
+                    expectReadingToEqualExpected(res, expected, GROUP_ID);
+                });
             });
         });
     });
diff --git a/src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_Thing36_gu_thing_st_-inf_et_inf_bd_13.csv b/src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_Thing36_gu_thing_st_-inf_et_inf_bd_13.csv
new file mode 100644
index 000000000..8ccc6c70a
--- /dev/null
+++ b/src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_Thing36_gu_thing_st_-inf_et_inf_bd_13.csv
@@ -0,0 +1,6 @@
+reading,start time,end time
+3098568.24778472,2022-08-28 00:00:00,2022-09-10 00:00:00
+3158442.06007844,2022-09-10 00:00:00,2022-09-23 00:00:00
+3078678.36050569,2022-09-23 00:00:00,2022-10-06 00:00:00
+3096487.3496156,2022-10-06 00:00:00,2022-10-19 00:00:00
+3121656.58075156,2022-10-19 00:00:00,2022-11-01 00:00:00
\ No newline at end of file