Blog & insights
Practical guidance on building energy modeling, certification and the codes that shape modern buildings.
LEED v5 elevates the integrative process into its own category of upfront assessments — climate resilience, human impact and carbon. Here's what changes and where energy modeling fits.
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A practical guide to Appendix G's Performance Rating Method, baseline vs proposed building models, LEED energy modeling and common compliance mistakes.
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Compare COMcheck and whole-building energy modeling for commercial energy code compliance, including when each path works best and what documentation teams need.
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Compare DesignBuilder, EnergyPlus and OpenStudio for building energy modeling, including strengths, limitations and when each tool makes sense.
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Learn how LEED EAp2 and EAc2 energy modeling works, how ASHRAE 90.1 Appendix G is used, and what architects and LEED consultants should prepare before submission.
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Understand LEED daylight analysis, including spatial daylight autonomy (sDA), annual sunlight exposure (ASE), glare control and how daylight modeling supports better design.
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A practical guide to thermal comfort modeling using PMV, PPD and ASHRAE 55, including inputs, comfort risks and how simulation supports WELL, LEED and HVAC design.
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Learn how energy modeling helps NYC building owners understand Local Law 97 emissions exposure, evaluate retrofit measures and reduce carbon penalties.
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A practical guide to 179D energy modeling, eligible commercial building systems, ASHRAE 90.1 Appendix G, inspection requirements and documentation for tax deduction studies.
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How existing building energy modeling supports retrofit planning, decarbonization, energy-cost reduction, utility incentives and capital improvement decisions.
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A clear checklist of drawings, schedules, HVAC data, envelope inputs and project information needed to start a building energy model.
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A practical guide for architects on when to start energy modeling, what drawings and inputs are needed, and how early modeling reduces redesign and compliance risk.
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The 10 WELL concepts, certification levels, on-site performance verification, how WELL differs from LEED, and how thermal comfort, daylight and ventilation modeling support it.
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Florida's hot-humid energy code explained — the 2023 FBC-EC (IECC 2021-based), its prescriptive, performance and ERI compliance paths, and what the climate means for design.
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California Title 24 Part 6 explained — the 2025 code (effective Jan 2026), prescriptive vs performance paths, CBECC software and the state's 16 climate zones.
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How EnergyPlus's heat-and-moisture methods differ — CTF, EMPD, Simple Steady-state Moisture Flux and the fully-coupled HAMT — and how to choose for accuracy vs run time.
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NCC 2022 lifted new homes to 7 stars plus a Whole-of-Home energy budget. How NatHERS works, what changed, and how HERO accredited software models and certifies a compliant home.
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What thermal bridges cost you, how psi-values and y-values work in SAP, the fRsi condensation safeguard, and how junctions are modelled in THERM for Part L compliance.
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LEED v5 makes embodied carbon mandatory. A clear look at the new Life-Cycle Assessment prerequisite (MRp2), the Reduce Embodied Carbon credit (MRc2), and what teams must do.
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USGBC's LEED v5 puts decarbonization at the center — shifting energy modeling from cost savings to carbon, with a new operational-carbon and decarbonization-plan prerequisite.
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The 2025 NYC Energy Conservation Code takes effect for jobs filed on or after March 30, 2026. Here's what's changing — electrification, tighter HVAC and lighting — plus how it ties into Local Law 97.
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A clear comparison of the 2016 and 2019 editions — lighting power density, envelope, HVAC and Appendix G — and what the differences mean for your energy model.
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A plain-English introduction to whole-building energy simulation: what it is, how it works, and why it's the key to passing energy codes and earning green-building certifications.
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