HVAC System Performance Record 

START HERE — REQUIRED SEQUENCE

1. HPR-BL (Baseline — Part A)

2. NIRET (Authorization Gate)

3. HPR-BL (Part B — ONLY if authorized)

4. Intervention

5. HPR-V (Post Verification)

DO NOT SKIP STEPS

DO NOT CHANGE ORDER

Violation = ALL RESULTS INVALID

If you touch the system before baseline:

You are no longer measuring reality.

You are altering it.

HVAC PERFORMANCE RECORD — BASELINE (HPR-BL)

--------------------------------------------------

PURPOSE

--------------------------------------------------

This record establishes system reality BEFORE any intervention.

It is a measurement-only document used to preserve the

original operating condition of the system.

DO NOT:

- Diagnose

- Assign fault

- Recommend repairs

- Interpret results

Record only what the system is doing.

This record becomes the foundation for:

HPR-BL → NIRET → INTERVENTION → HPR-V

If this baseline is incomplete, altered, or violated:

NO diagnostic determination is valid.

--------------------------------------------------

INITIALIZATION

--------------------------------------------------

Date: ___________________________

Start Time: _____________________

Technician Name: ________________

System Location: ________________

System Type: ____________________

Equipment ID / Model: ___________

--------------------------------------------------

STEP 0 — SYSTEM VALIDITY GATE (ALL MUST PASS)

--------------------------------------------------

☐ Cooling mode active  

☐ System ran ≥ 20 minutes (stabilized)  

☐ Outdoor temperature within operating range  

☐ Return air within normal range (~70–80°F)  

☐ No visible icing, oil leaks, or electrical faults  

☐ Airflow not restricted (filter, coil, vents checked)  

📸 System Running Photo: __________________

IF ANY ITEM IS UNCHECKED:

BASELINE INVALID — STOP

==================================================

PART A — NON-INVASIVE BASELINE (REQUIRED)

==================================================

--------------------------------------------------

STEP 1 — TEMPERATURE MEASUREMENTS

--------------------------------------------------

OAT: ______ °F  

RAT: ______ °F  

SAT: ______ °F  

SLT: ______ °F  

LLT: ______ °F  

📸 Temperature Readings: __________________  

📸 Probe Placement: _______________________

--------------------------------------------------

STEP 2 — DERIVED VALUES

--------------------------------------------------

Air-Side Split (RAT − SAT): ______ °F  

Liquid Line Approach (LLT − OAT): ______ °F  

Suction Depression (RAT − SLT): ______ °F  

--------------------------------------------------

STEP 3 — STABILITY VERIFICATION

--------------------------------------------------

T+0

OAT: ____ RAT: ____ SAT: ____  

SLT: ____ LLT: ____  

T+2

OAT: ____ RAT: ____ SAT: ____  

SLT: ____ LLT: ____  

T+5

OAT: ____ RAT: ____ SAT: ____  

SLT: ____ LLT: ____  

--------------------------------------------------

STABILITY CLASSIFICATION

--------------------------------------------------

☐ Stable  

☐ Minor Drift  

☐ Unstable  

IF UNSTABLE:

DATA INVALID — RESTART

--------------------------------------------------

MANDATORY TRANSITION

--------------------------------------------------

You MUST now perform NIRET.

DO NOT:

- Connect gauges

- Measure pressure

- Access refrigerant

Failure to perform NIRET:

INVALIDATES this record.

==================================================

PART B — REFRIGERANT SIDE (LOCKED)

==================================================

ONLY COMPLETE IF NIRET = GO

Suction Pressure: ______  

Head Pressure: ______  

Superheat: ______  

Subcooling: ______  

📸 Gauge Readings: __________________

--------------------------------------------------

INTEGRITY RULE

--------------------------------------------------

If Part B is completed without NIRET:

THIS RECORD IS INVALID

--------------------------------------------------

TECHNICIAN ATTESTATION

--------------------------------------------------

☐ Measured before intervention  

☐ No values estimated  

☐ Sequence followed  

Name: __________________  

Signature: _____________  

Date: _________________

SYSTEM GOVERNANCE RULE

This system does NOT produce opinions.

Only results supported by:

- Measured baseline

- Authorized intervention

- Verified performance

are valid.

Without all three:

NO determination exists