Research

Smoke Control & Pressurisation — NBC 2016 vs NFPA 92 vs BS EN 12101-6
This article applies analytical smoke-layer descent and tenability calculations to three representative Indian high-rise atrium configurations. Available Safe Egress Time (ASET) is computed using the steady-state Heskestad plume + smoke-layer equilibrium method per NFPA 92 §6.2; … Read more →

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This article applies analytical smoke-layer descent and tenability calculations to three representative Indian high-rise atrium configurations. Available Safe Egress Time (ASET) is computed using the steady-state Heskestad plume + smoke-layer equilibrium method per NFPA 92 §6.2; …

Research

Indian VRF Refrigerant Transition — R-22 to R-410A to R-32 to R-454B
This article presents a comparative performance and lifecycle-cost analysis of three low-GWP refrigerants — R32, R454B, and R-1234yf — applied to Indian Variable Refrigerant Flow (VRF) systems. A 100-ton VRF reference system is analyzed for capacity, IEER (Integrated Energy Effic… Read more →

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This article presents a comparative performance and lifecycle-cost analysis of three low-GWP refrigerants — R32, R454B, and R-1234yf — applied to Indian Variable Refrigerant Flow (VRF) systems. A 100-ton VRF reference system is analyzed for capacity, IEER (Integrated Energy Effic…

Research

Thermal Comfort — NBC vs ASHRAE 55 vs ISO 7730 vs Adaptive Model
This article synthesises published field-survey data and standards-based predictions to quantify thermal comfort compliance with ASHRAE 55-2020 in Indian mixed-mode commercial offices. Six published Indian field studies are reviewed, covering 1,800+ surveyed occupants across Bang… Read more →

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This article synthesises published field-survey data and standards-based predictions to quantify thermal comfort compliance with ASHRAE 55-2020 in Indian mixed-mode commercial offices. Six published Indian field studies are reviewed, covering 1,800+ surveyed occupants across Bang…

Research

PUE Performance of Free-Cooling Strategies in Indian Tier-III Data Centres: A Climate-Zone Analysis
This article quantifies the Power Usage Effectiveness (PUE) reduction achievable through free-cooling strategies in Indian Tier-III data centres across five climate zones. A 1 MW reference data centre is analyzed using airside economiser, waterside economiser, and combined approa… Read more →

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This article quantifies the Power Usage Effectiveness (PUE) reduction achievable through free-cooling strategies in Indian Tier-III data centres across five climate zones. A 1 MW reference data centre is analyzed using airside economiser, waterside economiser, and combined approa…

Research

ASHRAE 62.1 VRP vs NBC 2016 Pt 8 vs EN 16798-1 — How Much Outdoor Air Do Indian Buildings Actually Need?
This article presents a comparative analysis of ASHRAE 62.1-2022 Ventilation Rate Procedure (VRP) and NBC 2016 Part 8 ventilation requirements applied to representative Indian commercial occupancies. Five building types are analyzed: open-plan office (200 m², 50 occupants), confe… Read more →

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This article presents a comparative analysis of ASHRAE 62.1-2022 Ventilation Rate Procedure (VRP) and NBC 2016 Part 8 ventilation requirements applied to representative Indian commercial occupancies. Five building types are analyzed: open-plan office (200 m², 50 occupants), confe…

HVAC

Year-1 MEP Audit Checklist for Indian Commercial: What to Measure and When
The first 12 months of operating a new Indian commercial building reveal more about MEP design quality than the entire design + construction process combined. This audit checklist — structured month-b Read more →

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The first 12 months of operating a new Indian commercial building reveal more about MEP design quality than the entire design + construction process combined. This audit checklist — structured month-b

HVAC

MEP Commissioning Gotchas: 15 Site-Tested Failures That Surface Only at Handover
A building that passes drawing-review + factory-acceptance test can still fail at commissioning. The most expensive MEP failures are the ones that emerge only when systems are loaded under real operat Read more →

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A building that passes drawing-review + factory-acceptance test can still fail at commissioning. The most expensive MEP failures are the ones that emerge only when systems are loaded under real operat

HVAC

Post-Occupancy Energy Benchmark: What 12 Indian Commercial Buildings Reveal About Design-vs-Operation Gap
Energy modelling at design tells one story; metered operation tells another. The gap — almost always negative, building uses more energy than modelled — is the single biggest credibility problem facin Read more →

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Energy modelling at design tells one story; metered operation tells another. The gap — almost always negative, building uses more energy than modelled — is the single biggest credibility problem facin

Hotels & Hospitality, HVAC

DOAS + Chilled Beam Retrofit Case Study: Mixed-Air to Decoupled Latent at Chennai Luxury Hotel
The mixed-air AHU is the default Indian commercial HVAC architecture. In Chennai's warm-humid climate, it is also the worst-fit architecture for guestroom comfort, IAQ, and energy efficiency. This cas Read more →

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The mixed-air AHU is the default Indian commercial HVAC architecture. In Chennai’s warm-humid climate, it is also the worst-fit architecture for guestroom comfort, IAQ, and energy efficiency. This cas

Hotels & Hospitality, Plumbing & Drainage

Greywater System Commissioning Case Study: Operator Handover Gotchas at 280-Key Bengaluru Hotel
Greywater systems are easy to *design* and hard to *commission* — and even harder to keep running through year 2 + 3 of operations. This case study walks through the handover audit at a 280-key luxury Read more →

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Greywater systems are easy to *design* and hard to *commission* — and even harder to keep running through year 2 + 3 of operations. This case study walks through the handover audit at a 280-key luxury

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