HVAC

HVAC

Plate Heat Exchanger Selection: NTU Method, Approach, Fouling Factor
A plate heat exchanger (PHE) sits between two fluid streams — most commonly cooling tower water (CW) on one side, chilled water (CHW) on the other — transferring heat from one to the other. PHEs are t Read more →

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A plate heat exchanger (PHE) sits between two fluid streams — most commonly cooling tower water (CW) on one side, chilled water (CHW) on the other — transferring heat from one to the other. PHEs are t

HVAC, Plumbing & Drainage

Free Cooling Strategies: Waterside Economiser, Airside Economiser, Plate HX in India
Free cooling — using outdoor conditions to cool the chilled water loop without the chiller compressor — is the single largest energy-saving lever in commercial HVAC. ASHRAE 90.1-2022 mandates economis Read more →

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Free cooling — using outdoor conditions to cool the chilled water loop without the chiller compressor — is the single largest energy-saving lever in commercial HVAC. ASHRAE 90.1-2022 mandates economis

HVAC

Primary-Secondary vs Primary-Only-Variable: Hydronic Plant Design Trade-offs (Pillar)
The decision between Primary-Secondary (P-S) and Primary-Only-Variable (P-O-V) chiller plant configuration determines pump energy, control complexity, and "low ΔT" operational risk for the building's Read more →

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The decision between Primary-Secondary (P-S) and Primary-Only-Variable (P-O-V) chiller plant configuration determines pump energy, control complexity, and “low ΔT” operational risk for the building’s

HVAC

Cooling Tower Make-up: Cycles of Concentration, Blowdown, Drift Loss
A 200 TR cooling tower in an Indian summer evaporates roughly 35 m³/day of water — most of it cooling the chiller condenser, the rest carried by drift and dust loading on the tower fill. Make-up water Read more →

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A 200 TR cooling tower in an Indian summer evaporates roughly 35 m³/day of water — most of it cooling the chiller condenser, the rest carried by drift and dust loading on the tower fill. Make-up water

HVAC

Swimming Pool MEP: Filtration, Heating Load, Dehumidification & Make-up
A swimming pool is a hospitality amenity for users and an MEP integration challenge for designers. Filtration sets pump and pipe sizes; pool heating sets a substantial load on the boiler/heat-pump; de Read more →

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A swimming pool is a hospitality amenity for users and an MEP integration challenge for designers. Filtration sets pump and pipe sizes; pool heating sets a substantial load on the boiler/heat-pump; de

Hotels & Hospitality, HVAC, Standards

Hospital HVAC: NABH, FGI Guidelines, ASHRAE 170 Pressure Mapping (Pillar)
A hospital is the most demanding HVAC environment in commercial design. Multiple cleanliness levels, infection-control requirements, redundancy mandates, and patient-safety considerations all converge Read more →

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A hospital is the most demanding HVAC environment in commercial design. Multiple cleanliness levels, infection-control requirements, redundancy mandates, and patient-safety considerations all converge

HVAC, Standards

Data Centre HVAC: Uptime Tier I–IV, ASHRAE TC 9.9, Hot Aisle / Cold Aisle (Pillar)
A data centre's HVAC system has one job: keep IT equipment within manufacturer-specified thermal envelope, 24/7, with no failure window. ASHRAE TC 9.9 (Thermal Guidelines for Data Processing Environme Read more →

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A data centre’s HVAC system has one job: keep IT equipment within manufacturer-specified thermal envelope, 24/7, with no failure window. ASHRAE TC 9.9 (Thermal Guidelines for Data Processing Environme

HVAC

Cleanroom HVAC Design: ISO 14644 Class 5–8, Air Changes, Pressure Cascade (Pillar)
A cleanroom is defined by the maximum particle count per m³ at 0.5 micron and larger. ISO 14644-1:2015 specifies nine classes (ISO 1 through ISO 9). Pharmaceutical manufacturing typically requires ISO Read more →

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A cleanroom is defined by the maximum particle count per m³ at 0.5 micron and larger. ISO 14644-1:2015 specifies nine classes (ISO 1 through ISO 9). Pharmaceutical manufacturing typically requires ISO

HVAC

MERV-13 Filter Selection: Pressure Drop, Energy Penalty, Replacement Strategy
A MERV-13 filter delivers 85% efficiency at 1-3 micron particles — enough to remove most respiratory aerosols, allergens, smoke, and the larger end of viral droplets. The cost is pressure drop. A typi Read more →

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A MERV-13 filter delivers 85% efficiency at 1-3 micron particles — enough to remove most respiratory aerosols, allergens, smoke, and the larger end of viral droplets. The cost is pressure drop. A typi

HVAC

DOAS Design for Indian Hot-Humid Climates: Decoupling Latent & Sensible (Pillar)
In a hot-humid Indian climate, the outdoor air load can be 50-70% latent (moisture). Traditional all-air HVAC systems handle both sensible and latent at the same coil — at deep dewpoint requirements ( Read more →

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In a hot-humid Indian climate, the outdoor air load can be 50-70% latent (moisture). Traditional all-air HVAC systems handle both sensible and latent at the same coil — at deep dewpoint requirements (

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