Two divers wearing closed circuit rebreathers entering the water
CC Tech (45m)TDI

Air Diluent CCR

Official course standards ↗Last updated September 7, 2026

Entry-level closed-circuit rebreather certification for nitrox-certified divers transitioning to rebreather diving. Teaches unit operation, pre-dive checks, buoyancy and trim on CCR, and bailout procedures without staged decompression to 30m/100ft maximum depth. Gateway to more advanced rebreather diving.

Centres that teach this course

9 dive centres in the directory publish a price for this exact certification, checked Sep 2026. Each centre's own wording is shown beneath its name. Ranges cover whole-course prices only — where a centre charges per day or per dive, its rate is listed separately below, since a daily figure is not comparable with a course total.

IDR 23,000,000 – IDR 29,000,000across 4 centres pricing in Indonesian Rupiahfrom ≈ $1,281
  • Bali Dive TrekIndonesia
    TDI CCR Air Diluent CCR
    IDR 23,000,000
    total
  • Blue Marlin TechIndonesia
    JJ-CCR MOD 1
    IDR 29,000,000
    total
  • Manta DiveIndonesia
    TDI SF2 30m Air Diluent
    IDR 24,900,000
    total
  • Trawangan DiveIndonesia
    TDI Closed Circuit Rebreather Air Diluent Diver Certification
    IDR 24,900,000
    total
€1,100 – €1,500across 2 centres pricing in Eurofrom ≈ $1,234
Priced per day or per dive in US Dollar — see below.

    Charged by the day or dive rather than as a course price:

    • Cave AdventurersUnited States
      Air Diluent
      Private class$550/day→ $2,750 for the 5-day minimum
      Group class$450/day→ $2,250 for the 5-day minimum each
      $550
      per day
    • Under The JungleMexico
      Air Diluent / MOD 1
      private$425/day
      per diver in a group$375/day
      $425
      per day
    One centre publishes a price in Thai Baht.

    Same training under a different agency

    5 centres

    A separate set of centres, teaching CCR Air Diluent / MOD 1 under a different agency. These are not the same certification — the standards and the card differ — but they cover the same depth and scope, which is why centres price them alike. Every row here names whose rating it is, and none of them is counted above.

    €1,100 – €1,150across 3 centres pricing in Eurofrom ≈ $1,234
    IDR 23,000,000across 3 centres pricing in Indonesian Rupiahfrom ≈ $1,281
    One centre publishes a price in Thai Baht.

    Same tier, agency not stated

    7 centres

    These centres publish a price for CCR Air Diluent / MOD 1, but their own wording does not say which agency's certification it buys — many teach several and name the card only once you enquire, and some price one course for either agency. The figure is comparable; the certification is not identified, so we do not guess at one.

    $1,850 – $2,400across 2 centres pricing in US Dollar
    • Speleo ZoneMexico
      CCR Liberty Mod 1 (40 m)
      $1,850
      total
    • Dive GainesvilleUnited States
      "MOD 1" (100′ or 150′ max depth w/limited decompression) – ISC Meg (Classic, 15, Tiburon), Fathom, Choptima or SF2
      $2,400
      $2,400
      total

    Charged by the day or dive rather than as a course price:

    • Elite Divers InternationalMexico
      Fathom Gemini MOD 1 Diver
      $330/day→ $1,650 for the 5-day minimum
      $330
      per day
    • Protec MexicoMexico
      CCR Air Diluent
      1 student$420/day→ $2,940 for the 7-day minimum
      2+ students$370/day→ $2,590 for the 7-day minimum each
      $420
      per day
    • Third Dimension DivingMexico
      FATHOM Dive Systems CCR (MKV/GEMINI) MOD 1 (Adv. EANx / Trimix)
      $330/day
      $330
      per day
    One centre publishes a price in Thai Baht.
    One centre publishes a price in British Pound.
    • Black Water TekIndonesia
      JJ-CCR or Evolution Air Diluent Diver 30m
      £1,350
      total

    These prices are not like-for-like. Two centres can charge very differently for the same certification because they include different things. One price may cover twinsets, stages, deco gas and cylinder rental for every training dive, a dedicated classroom for the theory, boat or transport to the site, and the agency's registration and materials; another may be tuition only, with all of that charged separately — or the other way round, with a centre bundling in extras the first leaves out. Class size, whether the course is one-to-one, and how many days are allowed for it move the figure too. Check what each centre's price includes before comparing them, and confirm with the centre before booking.

    Consumables are usually extra. Sorb, helium, O₂ and other fills, park and cenote fees, certification fees and rental are commonly charged on top.

    Packages combining several certifications, upgrades from an existing one, and open-ended day rates are excluded — none of them is the standalone price of this course, and including them would move the figures away from what a new student can actually book.

    Prerequisites

    TDI Nitrox Diver; Minimum 20 logged open water dives (10 logged CCR dives in past 12 months for unit crossover); Minimum age 18; Unit-specific training on selected CCR unit

    Standards

    What a diver must demonstrate to pass this course — not always published by the certifying agency.

    Minimum 7 dives with 420 minutes accumulated bottom time, maximum 30m/100ft depth. Land drills: unit-specific pre-dive checks, hypoxia recognition, bailout procedures. In-water skills: CCR-specific buoyancy and trim, unit operation, bailout execution, hypoxic awareness. Competency demonstration on specific unit.

    Instructors Teaching This Course

    Dive Centres Offering This Course

    We're still building out the directory country by country, so this list isn't every instructor or dive centre teaching it in the world — more locations are coming soon.

    Common questions about TDI Air Diluent CCR

    How much does TDI Air Diluent CCR cost?

    Published prices for TDI Air Diluent CCR range across 7 centres in the TecDiveTools directory — roughly US$1,200 to US$2,250 at current exchange rates. In each centre's own currency: IDR 23,000,000–29,000,000 (4 centres), €1,100–€1,500 (2 centres) and THB 75,000 (1 centre). 2 centres charge by the day instead, which is not comparable with a course total. Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.

    How long does TDI Air Diluent CCR take?

    Between 5 and 7 days, based on the durations 5 centres publish for it. The time depends on the centre's schedule, weather, and how quickly the required skills are demonstrated — agencies set a minimum number of dives, not a fixed number of days.

    What are the prerequisites for TDI Air Diluent CCR?

    TDI's standards require: TDI Nitrox Diver; Minimum 20 logged open water dives (10 logged CCR dives in past 12 months for unit crossover); Minimum age 18; Unit-specific training on selected CCR unit.

    What is the minimum age for TDI Air Diluent CCR?

    TDI's standards state: Minimum age 18.

    How many dives do I need before starting TDI Air Diluent CCR?

    TDI's standards state: Minimum 20 logged open water dives (10 logged CCR dives in past 12 months for unit crossover).

    How deep can you dive with TDI Air Diluent CCR?

    TDI's standards for TDI Air Diluent CCR set a maximum depth of 30 m.

    What does TDI Air Diluent CCR training involve?

    According to TDI's published standards: Minimum 7 dives with 420 minutes accumulated bottom time, maximum 30m/100ft depth. Land drills: unit-specific pre-dive checks, hypoxia recognition, bailout procedures. In-water skills: CCR-specific buoyancy and trim, unit operation, bailout execution, hypoxic awareness. Competency demonstration on specific unit.

    What is the equivalent of TDI Air Diluent CCR in other agencies?

    At the same tier in TecDiveTools' cross-agency comparison: RAID 30m (100ft) CCR Course, SSI XR CCR Diving, ANDI CCR Level 2 (Unit Specific) and PADI TecRec Tec 40 CCR. They cover comparable training, but each agency sets its own standards, depth limits and certification card, so they are comparable rather than interchangeable — check which one your next course accepts.

    RAID 30m (100ft) CCR CourseSSI XR CCR DivingANDI CCR Level 2 (Unit Specific)PADI TecRec Tec 40 CCR

    What course comes after TDI Air Diluent CCR?

    The next step in TDI's progression is TDI Air Diluent CCR Decompression Procedures.

    TDI Air Diluent CCR Decompression Procedures

    Where can I take TDI Air Diluent CCR?

    85 dive centres and 133 instructors in the TecDiveTools directory teach TDI Air Diluent CCR across 7 countries, most in the United States, Indonesia, Egypt and Thailand. Each is listed further up this page.

    Does the price of TDI Air Diluent CCR include gas and equipment?

    Not always — it varies by centre. Sorbent and oxygen, certification fees, equipment rental and boat or site fees are commonly charged on top of the course price. Each centre's price list on TecDiveTools shows what it notes as included.

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