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HVAC Tips Articles

Practical guides and resources written by HVAC technicians in the HVAC Tips category.

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📋 HVAC Tips

EPA Leak Rate Thresholds: 10% / 20% / 30% — Section 608 Exam Answers (2019 & 2026 Rules)

Studying for the EPA 608? The answer is 10% comfort cooling, 20% commercial refrigeration, 30% industrial process refrigeration — the same three thresholds under the 2019 Section 608 rule and the 2026 HFC rule. Plain-English explanation plus direct answers to the exam questions.

July 3, 2026 8 min read

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The True Cost of a Lost Serial Number on a Rooftop Unit

It's just a number — until you need it for a warranty claim, a parts order, or an EPA refrigerant report. Here's what losing it actually costs.

May 10, 2026 5 min read

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What Is SEER Rating and Why It Should Live in Your Equipment Records

SEER tells you how efficient a system is — and knowing it for every unit in your portfolio matters more than most people realize.

May 5, 2026 5 min read

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