MAC Learning Center

Course Payment Options:

Online Transfer
1. Beneficiary: Maraj Air Conditioning Ltd
2. Address: Lp # 42 Aranguez Main Road, San Juan
3. Country: Trinidad
4. TTD Account Number 2697693
5. Bank: First Citizens Bank
6. Bank Country: Trinidad
7. Address: Eastern Main Road, Tunapuna
8. Transit No: 010100013

In-person Payments
Payments can also be made in person at the
San Juan branch of Maraj Air Conditioning Ltd.:
Lp # 42 Aranguez Main Road, San Juan
Please enquire by the cashier.

5 More Days to Register! Payment Plans available.
Call or message us today! (868) 714-5583

❄️Registration for our upcoming Courses will be closed soon.
Call or message us and reserve your spot today!
714-5583❄️

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Why Do HVAC Ducts or Diffusers "Sweat"?

Ever notice water droplets forming on diffusers or ducts? This common issue in HVAC systems happens due to condensation, and understanding the cause is key to preventing it.

Main Causes:

Low supply air temperature - diffuser surface drops below room dew point

High indoor humidity - metal surfaces collect moisture

Poor insulation - duct surface becomes too cold

Air leakage warm, humid air mixes with cold diffuser

Imbalance in supply & return air - results in abnormally low surface temperatures

Practical Solutions:

Maintain supply air at 12-14°C, avoid going below 10°C

Keep indoor humidity ≤ 55% RH

Ensure proper insulation + v***r barrier

Seal all air leakages around diffusers or ceiling plenums

Perform air balancing across the system

Use anti-sweat or plastic diffusers in humid areas

Key Takeaway:

Condensation occurs whenever the surface temperature drops below the room air dew point. The most effective strategy is:

Control supply air temperature + Control humidity + Proper insulation + Maintain
system balance

Guys! Registration is ongoing for Fundamentals of Air Conditioning and Refrigeration and Auto Air Conditioning. Give us a call or message us now! Deadline for Registration is September 19th, 2025.

☎️ 868-674-6348 ext 1 / 2
📲 (868) 714-5583

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