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ACU Fleet (29 units coated) — Unit by Unit Export Data M&V Library The Refinery
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NYT Printing Facility, Queens NY | AHU — Mammoth Tier 1
ACU-11 ACU-14 ACU-10 ACU-12

ACU-14 160T Live Monitoring

160-ton Mammoth AHU. Cross-season pre/post (Oct 2015 pre vs Jun 2016 post) — EER confounded by humidity. Best metric: compressor kW comparison at matched OAT bins.

Cross-Season Confound: Pre-treatment data was collected in a different season than post-treatment (2015-10-21 – 2015-10-28 vs 2016-06-07 – 2016-06-21). At the same outdoor temperature, summer air carries ~20% higher entering enthalpy than fall air, which inflates apparent EER improvement. The kW comparison below is the more honest metric.
Measured Performance Over Time
Pre-treatment Post-treatment Treatment date Outdoor temp (right axis)
EER Comparison (Cross-Season — Use With Caution)

EER Improvement by Outdoor-Temperature Bin CONFOUND WARNING

Mean EER computed within 5°F ambient bins. Caution: Pre and post data are from different seasons — humidity differences inflate the EER delta.

Bin (°F) EER pre EER post Δ% n pre / post
55-60 9.35 12.00
+28.3%
26 / 34
60-65 8.30 11.99
+44.5%
1,327 / 2,118
65-70 14.56 11.99
-17.6%
297 / 4,325
70-75 4.11 11.99
+191.7%
71 / 3,759
Layer 1: Power Comparison

Total kW by Outdoor-Temperature Bin

Mean total power consumption within temperature bins. Lower kW post-treatment = genuine efficiency gain.

Bin (°F) kW pre kW post Δ% n pre / post
55-60 45.8 61.8
+35.0%
26 / 34
60-65 53.4 71.5
+33.9%
1,394 / 2,120
65-70 58.0 79.2
+36.5%
297 / 4,325
70-75 67.5 85.4
+26.5%
71 / 3,761
Data Windows

Pre-Treatment

Readings
7,538
2015-10-21 → 2015-11-20
Avg EER7.57 Btu/Wh
Avg Power54.62 kW

Post-Treatment

Readings
19,463
2016-06-07 → 2016-06-20
Avg EER11.99 Btu/Wh
Avg Power85.52 kW
Persistence Analysis

2026 Monnit live (10-year)

Monnit CT measures compressor only (confirmed: max 67A ≈ historical comp FLA). Compared against 2015 pre-treatment comp-channel kW at matched OAT bins. Both are shoulder-season data (Apr vs Oct).

-53.2%
Weighted kW Δ
4
OAT Bins
44,697
Readings
Bin (°F) kW Baseline kW Persistence Δ% n base / pers
55-60 45.8 24.6
-46.4%
26 / 935
60-65 53.4 25.3
-52.6%
1,394 / 5,450
65-70 58.0 26.4
-54.5%
297 / 10,164
70-75 67.5 26.8
-60.3%
71 / 11,225
IPMVP Compliance
Borderline IPMVP Option B · Retrofit Isolation
4
OAT Bins (55–75°F)
7,538 / 19,463
Readings Pre / Post
29 / 13
Window (days)

Cross-season pre/post (Oct vs Jun) confounds EER. kW-vs-OAT is reliable metric. 10+ year persistence confirmed.

Measurement Details

Dataset Metadata

Resolution1 minute
TimezoneAmerica/New_York
Total Readings27,001
Pre-treatment Window2015-10-21 – 2015-10-28
Post-treatment Window2016-06-07 – 2016-06-21
CFM32,000
Tonnage160T

Measured Fields

FieldLabelUnit
oat Outdoor Temp °F
total_kw Total Power kW
ind_eer EER (independent) Btu/Wh
ind_tons Tons (independent) tons
Download pre CSV ↓ Download post CSV ↓