CSA-B52 Compliance Path Navigation Tool

CSA-B52 Compliance Path Navigation Tool

By Hemanshu Anand
Decision tree
Open interactive version →

Overview

Type
Decision tree
Entry
Q1
Questions
37
Outcomes
11
Author
Hemanshu Anand
Last updated
2026-07-24

Full decision path

Start: Q1

Q1 — This interactive tool will help you navigate the CSA-B52 code. By answering a series of yes/no questions, you will be able to identify sections and calculations from the code that are relevant to your application. This tool does not replace the code nor legally certify any compliance. Under no circumstances shall this tool or it's creator be liable for any direct or indirect damage or loss; physical, financial, or otherwise. Do you understand and accept these terms?

Q2 — Is the equipment accepted by a certification body (CSA or UL)?

Q2b — Is the ms <= 3kg (6.6lbs)?

Q2c — Is the ms <= 10kg (22lbs)?

Q3 — Is this a packaged system?

Q3b — Is the system installed in a public corridor or a lobby?

Q4 — Is the refrigerant Class A1 or B1 as per ASHRAE 34?

Q5 — Have you calculated the EDVC based on section 4.5.4.4?

Q4a — Have you calculated the Ms based on section 4.5.8.3 and the EDVC based on section 4.5.4.4?

Q6 — Is the ms <= EDVC?

Q8 — Is the ms <= EDVC and is the ms <= Ms, both?

Q9 — Is this a packaged system?

Q9b — Is the system installed in a commercial space (indoors) and not public corridor or a lobby?

Q9c — Is the equipment with this refrigeration system located outdoors?

Q10 — Is the equipment with this refrigeration system located in a lab with more than 9.3 sq. meters (100 sq. feet) per person?

Q10b — Is the refrigeration system located in an industrial occupancy or a refrigerated room?

Q11 — Is the refrigerant Class A1 or B1 as per ASHRAE 34?

Q11b — Is the system considered low-probability as per the B52 code?

Q11c — Is the refrigerant class B1 as per ASHRAE 34?

Q12 — Is the refrigerant Class A2L as per ASHRAE 34?

Q12b — Is the system considered low-probability as per the B52 code?

Q13 — Is the system used for human comfort?

Q13b — Is there continuous or detection-based ventilation in the system/equipment?

Q14 — Have you calculated the Ms based on section 4.5.6?

Q15 — Have you calculated the EDVC based on section 4.5.5.2?

Q16 — Have you calculated the EDVC based on section 4.5.5.3?

Q14b — Is there any indoor equipment with a capacity under 17kW (5T)?

Q15b — Is there any indoor equipment with a capacity under 17kW (5T)?

Q16b — Is there any indoor equipment with a capacity under 17kW (5T)?

Q17 — Is the ms <= EDVC (based on section 4.5.5)?

Q17b — Is the ms <= Ms (based on section 4.5.6)?

Q18 — Are there any release mitigation controls as per section 4.5.4.6?

Q18b — Are there any release mitigation controls as per section 4.5.4.6?

Q19 — Is the mrel <= EDVC (based on section 4.5.5)?

Q19b — Is the mrel <= EDVC (based on section 4.5.5)?

Q20 — Have you calculated the EDVC based on section 4.5.4.4?

Q20b — Is the ms <= EDVC (based on section 4.5.4.4)?

Outcomes

Goodbye. (GOODBYE)
Reached from Q1 (no).
Please use a certified equipment. (CERT_NEED)
Reached from Q2 (no).
System in compliance. No EDVC calculations needed. Proceed with OEM insrtructions. (OK_NO_EDVC)
Reached from Q3b (no), Q9b (yes), Q10 (yes).
System in compliance. No EDVC calculations needed. Check section 6.2.5.6 if you have any obstruction of airflow (walls, screens, etc). (OK_OUT)
Reached from Q9c (yes).
Calcuations needed in order to continue. (CALC_NEED)
Reached from Q5 (no), Q4a (no), Q14 (no), Q15 (no), Q16 (no), Q20 (no).
Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC or Ms value. (SYS_OK)
Reached from Q6 (yes), Q8 (yes), Q17 (yes), Q17b (yes), Q19 (yes), Q19b (yes).
System is not in compliance with the B52. You will need to increase your installation space or change refrigerant. (NOT_OK)
Reached from Q6 (no), Q8 (no), Q17 (no), Q17b (no), Q19 (no), Q19b (no), Q20b (no).
If all conditions of section 4.5.8.4 are met, the system will be in compliance. No EDVC calculations needed. (OK_INDST_REF)
Reached from Q10b (yes).
System is not in compliance with the B52. A high-probability, Class B1 system is only allowed in an industrial occupancy. (NOT_OK_INDST)
Reached from Q11c (yes).
Class A2, A3, B2L, B2, or B3 refrigerant noticed. (NOT_OK_B)
Reached from Q12 (no).
Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC. No mechanical room needed. (OK_NO_MEC)
Reached from Q20b (yes).

Machine-Readable JSON (Canonical Model)

View JSON
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      "id": "Q1",
      "text": "This interactive tool will help you navigate the CSA-B52 code. By answering a series of yes/no questions, you will be able to identify sections and calculations from the code that are relevant to your application. This tool does not replace the code nor legally certify any compliance. Under no circumstances shall this tool or it's creator be liable for any direct or indirect damage or loss; physical, financial, or otherwise. Do you understand and accept these terms?"
    },
    {
      "id": "Q2",
      "text": "Is the equipment accepted by a certification body (CSA or UL)?"
    },
    {
      "id": "Q2b",
      "text": "Is the ms <= 3kg (6.6lbs)?"
    },
    {
      "id": "Q2c",
      "text": "Is the ms <= 10kg (22lbs)?"
    },
    {
      "id": "Q3",
      "text": "Is this a packaged system?"
    },
    {
      "id": "Q3b",
      "text": "Is the system installed in a public corridor or a lobby?"
    },
    {
      "id": "Q4",
      "text": "Is the refrigerant Class A1 or B1 as per ASHRAE 34?"
    },
    {
      "id": "Q5",
      "text": "Have you calculated the EDVC based on section 4.5.4.4?"
    },
    {
      "id": "Q4a",
      "text": "Have you calculated the Ms based on section 4.5.8.3 and the EDVC based on section 4.5.4.4?"
    },
    {
      "id": "Q6",
      "text": "Is the ms <= EDVC?"
    },
    {
      "id": "Q8",
      "text": "Is the ms <= EDVC and is the ms <= Ms, both?"
    },
    {
      "id": "Q9",
      "text": "Is this a packaged system?"
    },
    {
      "id": "Q9b",
      "text": "Is the system installed in a commercial space (indoors) and not public corridor or a lobby?"
    },
    {
      "id": "Q9c",
      "text": "Is the equipment with this refrigeration system located outdoors?"
    },
    {
      "id": "Q10",
      "text": "Is the equipment with this refrigeration system located in a lab with more than 9.3 sq. meters (100 sq. feet) per person?"
    },
    {
      "id": "Q10b",
      "text": "Is the refrigeration system located in an industrial occupancy or a refrigerated room?"
    },
    {
      "id": "Q11",
      "text": "Is the refrigerant Class A1 or B1 as per ASHRAE 34?"
    },
    {
      "id": "Q11b",
      "text": "Is the system considered low-probability as per the B52 code?"
    },
    {
      "id": "Q11c",
      "text": "Is the refrigerant class B1 as per ASHRAE 34?"
    },
    {
      "id": "Q12",
      "text": "Is the refrigerant Class A2L as per ASHRAE 34?"
    },
    {
      "id": "Q12b",
      "text": "Is the system considered low-probability as per the B52 code?"
    },
    {
      "id": "Q13",
      "text": "Is the system used for human comfort?"
    },
    {
      "id": "Q13b",
      "text": "Is there continuous or detection-based ventilation in the system/equipment?"
    },
    {
      "id": "Q14",
      "text": "Have you calculated the Ms based on section 4.5.6?"
    },
    {
      "id": "Q15",
      "text": "Have you calculated the EDVC based on section 4.5.5.2?"
    },
    {
      "id": "Q16",
      "text": "Have you calculated the EDVC based on section 4.5.5.3?"
    },
    {
      "id": "Q14b",
      "text": "Is there any indoor equipment with a capacity under 17kW (5T)?"
    },
    {
      "id": "Q15b",
      "text": "Is there any indoor equipment with a capacity under 17kW (5T)?"
    },
    {
      "id": "Q16b",
      "text": "Is there any indoor equipment with a capacity under 17kW (5T)?"
    },
    {
      "id": "Q17",
      "text": "Is the ms <= EDVC (based on section 4.5.5)?"
    },
    {
      "id": "Q17b",
      "text": "Is the ms <= Ms (based on section 4.5.6)?"
    },
    {
      "id": "Q18",
      "text": "Are there any release mitigation controls as per section 4.5.4.6?"
    },
    {
      "id": "Q18b",
      "text": "Are there any release mitigation controls as per section 4.5.4.6?"
    },
    {
      "id": "Q19",
      "text": "Is the mrel <= EDVC (based on section 4.5.5)?"
    },
    {
      "id": "Q19b",
      "text": "Is the mrel <= EDVC (based on section 4.5.5)?"
    },
    {
      "id": "Q20",
      "text": "Have you calculated the EDVC based on section 4.5.4.4?"
    },
    {
      "id": "Q20b",
      "text": "Is the ms <= EDVC (based on section 4.5.4.4)?"
    }
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  "outcomes": [
    {
      "id": "GOODBYE",
      "label": "Goodbye."
    },
    {
      "id": "CERT_NEED",
      "label": "Please use a certified equipment."
    },
    {
      "id": "OK_NO_EDVC",
      "label": "System in compliance. No EDVC calculations needed. Proceed with OEM insrtructions."
    },
    {
      "id": "OK_OUT",
      "label": "System in compliance. No EDVC calculations needed. Check section 6.2.5.6 if you have any obstruction of airflow (walls, screens, etc)."
    },
    {
      "id": "CALC_NEED",
      "label": "Calcuations needed in order to continue."
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    {
      "id": "SYS_OK",
      "label": "Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC or Ms value."
    },
    {
      "id": "NOT_OK",
      "label": "System is not in compliance with the B52. You will need to increase your installation space or change refrigerant."
    },
    {
      "id": "OK_INDST_REF",
      "label": "If all conditions of section 4.5.8.4 are met, the system will be in compliance. No EDVC calculations needed."
    },
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      "id": "NOT_OK_INDST",
      "label": "System is not in compliance with the B52. A high-probability, Class B1 system is only allowed in an industrial occupancy."
    },
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      "label": "Class A2, A3, B2L, B2, or B3 refrigerant noticed."
    },
    {
      "id": "OK_NO_MEC",
      "label": "Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC. No mechanical room needed."
    }
  ],
  "dsl": "dag: CSA-B52 Compliance Path Navigation Tool\nentry: Q1\n\nQ1: This interactive tool will help you navigate the CSA-B52 code. By answering a series of yes/no questions, you will be able to identify sections and calculations from the code that are relevant to your application. This tool does not replace the code nor legally certify any compliance. Under no circumstances shall this tool or it's creator be liable for any direct or indirect damage or loss; physical, financial, or otherwise. Do you understand and accept these terms?\n  hint: You may contact your Account Manager for any necessary calculations.\n  yes -> Q2\n  no  -> [GOODBYE]\nQ2: Is the equipment accepted by a certification body (CSA or UL)?\n  yes -> Q2b\n  no  -> [CERT_NEED]\nQ2b: Is the ms <= 3kg (6.6lbs)?\n  hint: The ms is the circuit refrigerant charge, released in case of a leak.\n  yes -> Q3\n  no  -> Q2c\nQ2c: Is the ms <= 10kg (22lbs)?\n  hint: The ms is the circuit refrigerant charge, released in case of a leak.\n  yes -> Q9\n  no  -> Q9c\nQ3: Is this a packaged system?\n  hint: Not a split or a VRF system.\n  yes -> Q3b\n  no  -> Q9c\nQ3b: Is the system installed in a public corridor or a lobby?\n  yes -> Q4\n  no  -> [OK_NO_EDVC]\nQ4: Is the refrigerant Class A1 or B1 as per ASHRAE 34?\n  yes -> Q5\n  no  -> Q4a\nQ5: Have you calculated the EDVC based on section 4.5.4.4?\n  hint: EDVC calculation based off the RCL.\n  yes -> Q6\n  no  -> [CALC_NEED]\nQ4a: Have you calculated the Ms based on section 4.5.8.3 and the EDVC based on section 4.5.4.4?\n  hint: EDVC calculation based off the RCL; Ms calculation based off LFL.\n  yes -> Q8\n  no  -> [CALC_NEED]\nQ6: Is the ms <= EDVC?\n  yes -> [SYS_OK]\n  no  -> [NOT_OK]\nQ8: Is the ms <= EDVC and is the ms <= Ms, both?\n  yes -> [SYS_OK]\n  no  -> [NOT_OK]\nQ9: Is this a packaged system?\n  hint: Not a split or a VRF system.\n  yes -> Q9b\n  no  -> Q9c\nQ9b: Is the system installed in a commercial space (indoors) and not public corridor or a lobby?\n  hint: ie: shops, stores, markets, restaurants, offices, labs, etc.\n  yes -> [OK_NO_EDVC]\n  no  -> Q9c\nQ9c: Is the equipment with this refrigeration system located outdoors?\n  yes -> [OK_OUT]\n  no  -> Q10\nQ10: Is the equipment with this refrigeration system located in a lab with more than 9.3 sq. meters (100 sq. feet) per person?\n  yes -> [OK_NO_EDVC]\n  no  -> Q10b\nQ10b: Is the refrigeration system located in an industrial occupancy or a refrigerated room?\n  yes -> [OK_INDST_REF]\n  no  -> Q11\nQ11: Is the refrigerant Class A1 or B1 as per ASHRAE 34?\n  yes -> Q11b\n  no  -> Q12\nQ11b: Is the system considered low-probability as per the B52 code?\n  yes -> Q20\n  no  -> Q11c\nQ11c: Is the refrigerant class B1 as per ASHRAE 34?\n  yes -> [NOT_OK_INDST]\n  no  -> Q20\nQ12: Is the refrigerant Class A2L as per ASHRAE 34?\n  yes -> Q12b\n  no  -> [NOT_OK_B]\nQ12b: Is the system considered low-probability as per the B52 code?\n  yes -> Q20\n  no  -> Q13\nQ13: Is the system used for human comfort?\n  yes -> Q13b\n  no  -> Q14\nQ13b: Is there continuous or detection-based ventilation in the system/equipment?\n  yes -> Q15\n  no  -> Q16\nQ14: Have you calculated the Ms based on section 4.5.6?\n  hint: Ms calculation based off the LFL.\n  yes -> Q14b\n  no  -> [CALC_NEED]\nQ15: Have you calculated the EDVC based on section 4.5.5.2?\n  hint: EDVC calculation based off the LFL.\n  yes -> Q15b\n  no  -> [CALC_NEED]\nQ16: Have you calculated the EDVC based on section 4.5.5.3?\n  hint: EDVC calculation based off Mdef interpolation and LFL.\n  yes -> Q16b\n  no  -> [CALC_NEED]\nQ14b: Is there any indoor equipment with a capacity under 17kW (5T)?\n  hint: Such as in a split or a VRF system.\n  yes -> Q18b\n  no  -> Q17b\nQ15b: Is there any indoor equipment with a capacity under 17kW (5T)?\n  hint: Such as in a split or a VRF system.\n  yes -> Q18\n  no  -> Q17\nQ16b: Is there any indoor equipment with a capacity under 17kW (5T)?\n  hint: Such as in a split or a VRF system.\n  yes -> Q18\n  no  -> Q17\nQ17: Is the ms <= EDVC (based on section 4.5.5)?\n  yes -> [SYS_OK]\n  no  -> [NOT_OK]\nQ17b: Is the ms <= Ms (based on section 4.5.6)?\n  yes -> [SYS_OK]\n  no  -> [NOT_OK]\nQ18: Are there any release mitigation controls as per section 4.5.4.6?\n  hint: This gives a mrel value. Contact OEM if needed.\n  yes -> Q19\n  no  -> Q17\nQ18b: Are there any release mitigation controls as per section 4.5.4.6?\n  hint: This gives a mrel value, which replaces the ms value. Contact OEM if needed.\n  yes -> Q19b\n  no  -> Q17b\nQ19: Is the mrel <= EDVC (based on section 4.5.5)?\n  hint: The mrel value replaces the ms value. See section 4.5.4.6 and contact OEM if needed.\n  yes -> [SYS_OK]\n  no  -> [NOT_OK]\nQ19b: Is the mrel <= EDVC (based on section 4.5.5)?\n  hint: The mrel value replaces the ms value. See section 4.5.4.6 and contact OEM if needed.\n  yes -> [SYS_OK]\n  no  -> [NOT_OK]\nQ20: Have you calculated the EDVC based on section 4.5.4.4?\n  hint: EDVC calculation based off the RCL.\n  yes -> Q20b\n  no  -> [CALC_NEED]\nQ20b: Is the ms <= EDVC (based on section 4.5.4.4)?\n  yes -> [OK_NO_MEC]\n  no  -> [NOT_OK]\n\n[GOODBYE]:              Goodbye.\n  description: Please accept the terms before continuing.\n[CERT_NEED]:            Please use a certified equipment.\n[OK_NO_EDVC]:           System in compliance. No EDVC calculations needed. Proceed with OEM insrtructions.\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.\n[OK_OUT]:               System in compliance. No EDVC calculations needed. Check section 6.2.5.6 if you have any obstruction of airflow (walls, screens, etc).\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.\n[CALC_NEED]:            Calcuations needed in order to continue.\n  description: Contact your Account Manager for help.\n[SYS_OK]:               Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC or Ms value.\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.\n[NOT_OK]:               System is not in compliance with the B52. You will need to increase your installation space or change refrigerant.\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.\n[OK_INDST_REF]:         If all conditions of section 4.5.8.4 are met, the system will be in compliance. No EDVC calculations needed.\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.\n[NOT_OK_INDST]:         System is not in compliance with the B52. A high-probability, Class B1 system is only allowed in an industrial occupancy.\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.\n[NOT_OK_B]:             Class A2, A3, B2L, B2, or B3 refrigerant noticed.\n  description: Please contact you Account Manager for help.\n[OK_NO_MEC]:            Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC. No mechanical room needed.\n  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52."
}

DSL Representation

dag: CSA-B52 Compliance Path Navigation Tool
entry: Q1

Q1: This interactive tool will help you navigate the CSA-B52 code. By answering a series of yes/no questions, you will be able to identify sections and calculations from the code that are relevant to your application. This tool does not replace the code nor legally certify any compliance. Under no circumstances shall this tool or it's creator be liable for any direct or indirect damage or loss; physical, financial, or otherwise. Do you understand and accept these terms?
  hint: You may contact your Account Manager for any necessary calculations.
  yes -> Q2
  no  -> [GOODBYE]
Q2: Is the equipment accepted by a certification body (CSA or UL)?
  yes -> Q2b
  no  -> [CERT_NEED]
Q2b: Is the ms <= 3kg (6.6lbs)?
  hint: The ms is the circuit refrigerant charge, released in case of a leak.
  yes -> Q3
  no  -> Q2c
Q2c: Is the ms <= 10kg (22lbs)?
  hint: The ms is the circuit refrigerant charge, released in case of a leak.
  yes -> Q9
  no  -> Q9c
Q3: Is this a packaged system?
  hint: Not a split or a VRF system.
  yes -> Q3b
  no  -> Q9c
Q3b: Is the system installed in a public corridor or a lobby?
  yes -> Q4
  no  -> [OK_NO_EDVC]
Q4: Is the refrigerant Class A1 or B1 as per ASHRAE 34?
  yes -> Q5
  no  -> Q4a
Q5: Have you calculated the EDVC based on section 4.5.4.4?
  hint: EDVC calculation based off the RCL.
  yes -> Q6
  no  -> [CALC_NEED]
Q4a: Have you calculated the Ms based on section 4.5.8.3 and the EDVC based on section 4.5.4.4?
  hint: EDVC calculation based off the RCL; Ms calculation based off LFL.
  yes -> Q8
  no  -> [CALC_NEED]
Q6: Is the ms <= EDVC?
  yes -> [SYS_OK]
  no  -> [NOT_OK]
Q8: Is the ms <= EDVC and is the ms <= Ms, both?
  yes -> [SYS_OK]
  no  -> [NOT_OK]
Q9: Is this a packaged system?
  hint: Not a split or a VRF system.
  yes -> Q9b
  no  -> Q9c
Q9b: Is the system installed in a commercial space (indoors) and not public corridor or a lobby?
  hint: ie: shops, stores, markets, restaurants, offices, labs, etc.
  yes -> [OK_NO_EDVC]
  no  -> Q9c
Q9c: Is the equipment with this refrigeration system located outdoors?
  yes -> [OK_OUT]
  no  -> Q10
Q10: Is the equipment with this refrigeration system located in a lab with more than 9.3 sq. meters (100 sq. feet) per person?
  yes -> [OK_NO_EDVC]
  no  -> Q10b
Q10b: Is the refrigeration system located in an industrial occupancy or a refrigerated room?
  yes -> [OK_INDST_REF]
  no  -> Q11
Q11: Is the refrigerant Class A1 or B1 as per ASHRAE 34?
  yes -> Q11b
  no  -> Q12
Q11b: Is the system considered low-probability as per the B52 code?
  yes -> Q20
  no  -> Q11c
Q11c: Is the refrigerant class B1 as per ASHRAE 34?
  yes -> [NOT_OK_INDST]
  no  -> Q20
Q12: Is the refrigerant Class A2L as per ASHRAE 34?
  yes -> Q12b
  no  -> [NOT_OK_B]
Q12b: Is the system considered low-probability as per the B52 code?
  yes -> Q20
  no  -> Q13
Q13: Is the system used for human comfort?
  yes -> Q13b
  no  -> Q14
Q13b: Is there continuous or detection-based ventilation in the system/equipment?
  yes -> Q15
  no  -> Q16
Q14: Have you calculated the Ms based on section 4.5.6?
  hint: Ms calculation based off the LFL.
  yes -> Q14b
  no  -> [CALC_NEED]
Q15: Have you calculated the EDVC based on section 4.5.5.2?
  hint: EDVC calculation based off the LFL.
  yes -> Q15b
  no  -> [CALC_NEED]
Q16: Have you calculated the EDVC based on section 4.5.5.3?
  hint: EDVC calculation based off Mdef interpolation and LFL.
  yes -> Q16b
  no  -> [CALC_NEED]
Q14b: Is there any indoor equipment with a capacity under 17kW (5T)?
  hint: Such as in a split or a VRF system.
  yes -> Q18b
  no  -> Q17b
Q15b: Is there any indoor equipment with a capacity under 17kW (5T)?
  hint: Such as in a split or a VRF system.
  yes -> Q18
  no  -> Q17
Q16b: Is there any indoor equipment with a capacity under 17kW (5T)?
  hint: Such as in a split or a VRF system.
  yes -> Q18
  no  -> Q17
Q17: Is the ms <= EDVC (based on section 4.5.5)?
  yes -> [SYS_OK]
  no  -> [NOT_OK]
Q17b: Is the ms <= Ms (based on section 4.5.6)?
  yes -> [SYS_OK]
  no  -> [NOT_OK]
Q18: Are there any release mitigation controls as per section 4.5.4.6?
  hint: This gives a mrel value. Contact OEM if needed.
  yes -> Q19
  no  -> Q17
Q18b: Are there any release mitigation controls as per section 4.5.4.6?
  hint: This gives a mrel value, which replaces the ms value. Contact OEM if needed.
  yes -> Q19b
  no  -> Q17b
Q19: Is the mrel <= EDVC (based on section 4.5.5)?
  hint: The mrel value replaces the ms value. See section 4.5.4.6 and contact OEM if needed.
  yes -> [SYS_OK]
  no  -> [NOT_OK]
Q19b: Is the mrel <= EDVC (based on section 4.5.5)?
  hint: The mrel value replaces the ms value. See section 4.5.4.6 and contact OEM if needed.
  yes -> [SYS_OK]
  no  -> [NOT_OK]
Q20: Have you calculated the EDVC based on section 4.5.4.4?
  hint: EDVC calculation based off the RCL.
  yes -> Q20b
  no  -> [CALC_NEED]
Q20b: Is the ms <= EDVC (based on section 4.5.4.4)?
  yes -> [OK_NO_MEC]
  no  -> [NOT_OK]

[GOODBYE]:              Goodbye.
  description: Please accept the terms before continuing.
[CERT_NEED]:            Please use a certified equipment.
[OK_NO_EDVC]:           System in compliance. No EDVC calculations needed. Proceed with OEM insrtructions.
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.
[OK_OUT]:               System in compliance. No EDVC calculations needed. Check section 6.2.5.6 if you have any obstruction of airflow (walls, screens, etc).
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.
[CALC_NEED]:            Calcuations needed in order to continue.
  description: Contact your Account Manager for help.
[SYS_OK]:               Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC or Ms value.
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.
[NOT_OK]:               System is not in compliance with the B52. You will need to increase your installation space or change refrigerant.
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.
[OK_INDST_REF]:         If all conditions of section 4.5.8.4 are met, the system will be in compliance. No EDVC calculations needed.
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.
[NOT_OK_INDST]:         System is not in compliance with the B52. A high-probability, Class B1 system is only allowed in an industrial occupancy.
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.
[NOT_OK_B]:             Class A2, A3, B2L, B2, or B3 refrigerant noticed.
  description: Please contact you Account Manager for help.
[OK_NO_MEC]:            Good work! System is in compliance with the B52. System refrigerant charge is less than the EDVC. No mechanical room needed.
  description: Results are provided for guidance only and must be verified against the current edition of CSA-B52.

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