by E-Calcs Plus, Inc. | Jul 15, 2026 | Duct Design, E-Calcs, Manual J Load Calculation
If you’re planning to install a new HVAC system, replace existing equipment, build a new home, or complete a major renovation, you’ve probably heard the term “load calculation.” A load calculation helps determine how much heating and cooling...
by E-Calcs Plus, Inc. | Jul 1, 2026 | Commercial Energy Calculations, E-Calcs, Manual J Load Calculation, Residential Energy Calculations
If you’ve received a permit review comment requesting Manual J, S, and D calculations, you’re not alone. This is one of the most common HVAC-related corrections issued by Florida building departments during residential and commercial permit reviews. While...
by E-Calcs Plus, Inc. | Jun 15, 2026 | HERS Rating
TL;DR What it is: HERS and ERI are standardized scores that measure a home’s energy efficiency; a lower score indicates a more efficient, cost-effective, and comfortable home. The Process: Evaluation occurs in three phases: a pre-construction design review, a...
by E-Calcs Plus, Inc. | Jun 1, 2026 | HERS Rating
TL;DR HERS vs. ERI: While both measure home energy efficiency on a scale where lower is better, HERS is a national branding tool for marketing, whereas ERI is the specific legal path used to meet the Florida Building Code. Builder Flexibility: The ERI path allows...
by E-Calcs Plus, Inc. | May 15, 2026 | Duct Design, Duct Leakage Testing
Energy Loss You Can’t See: Fixing Leaky Ducts TL;DR Invisible Energy Loss: Leaky air ducts cause up to 30% of conditioned air to escape, leading to significantly higher energy bills and uneven temperatures throughout your home. Humidity and Air Quality: Holes in...
