PHE Design Basis Report Studio

1.1 Project Identification

Title block / document control

Project Name

Client / Developer

City / Town type to search

State / UT

Latitude ° N

Longitude ° E

Altitude m above MSL

Location Line as printed in the title block

Consultant

Document No.

Revision

Date

Prepared By

Checked By

Approved By

Project Category

Plot Area m²

Total Built-up / GFA m²

Annual Rainfall mm — IMD, via RWH Manual 2019 Table 1

Rainfall Station

69 stations. Follows the project city until you pick one.

Climate Zone

1.2 Design Criteria & Statutory Basis

NBCS 2026 Pt.E · CPHEEO · NGT 2019

Fixture Efficiency

Green Rating Target

Treated Effluent Standard

Water Supply Sources tick every source, and give the share each carries

Design Life years

Peak Factor (sewage)

Zero Liquid Discharge

Water Demand Diversity %

Shown beside the total demand in section 03, the DBR and the Excel export — for information only. Tanks, pumps, sewage and the STP stay on the full demand. Pool, cooling-tower and boiler make-up, process water and fire top-up stay at 100 %.

Codes & Standards in Force The documents this tool draws on. Selecting them moved no calculation, so the picker is hidden rather than kept as a control that does nothing — the declaration still travels in the project and the report still schedules it.

1.3 Raw / Source Water Analysis

IS 3025 · IS 10500:2012 as amended June 2015

Region

The label you navigate by

Hydrogeological Province

What actually decides the chemistry

Source of these figures

1.4 Vastu Placement Guidance

Traditional · not a code

2.1 Site

The land and the project — the same fields as 1.1, edited in either place

Project Name

Development Type

Site Area m²

City

State / UT

Location as printed in the title block

Number of Buildings drives the list in 2.2

Built-up Area m²

Ground Coverage m²

Site Exposure decides pipe material

Site Remarks / Notes

2.2 Buildings, Floors & Areas

Building → Floor → Area → Usage · occupancy inherited downwards

Areas shown in

2.3 Population & PHE Inputs

NBCS 2026 Pt.E Sec.1 Cl.4.1 · Table 1 · Sec.2 Tables 1–17 — what 03 onwards is built on

2.4 Blocks & Direct Line Items

A use type from the rates library × a quantity in that rate's own unit — persons, keys, kg, m², TR-hr, tonnes

2.5 Master Data & Project Criteria — occupancies, sub-occupancies, usages, area types

3.0 Design Basis — Method, Settings & Rates

The governing code, the rates library in force, the settings every design figure is sized on — design factors, storage rules of thumb and assumptions

Design Method

Governing Code

Project-type Preset a saved set of these settings

Design Margin %

UG Storage days of design

OHT Storage fraction of a day

Treated-water Recovery % of design WW

Usage Hours h/day

Peak Factor ×

Default Return Factor 0–1, a row with none

Site Services Report Under landscape, cooling tower, pool, process, fire top-up

Name for that block where no site block exists

Peak per Block

Shown, each building and site block may keep its own usage hours and peak factor.

Design Factors & Notes — the firm's rules of thumb beside this project's figures

Rounding (display only), report caveats & code references

KLD decimals

Rates decimals

Quantities decimals

Percent decimals

m³ decimals

m³/h decimals

Caveats one per line — printed in the report Code references one per line — the codes the rates rest on; leave empty for the company list shown greyed

Every figure is carried at full precision; these places are what the screen, the report and the workbook print.

3.1 Domestic Water Demand

NBCS 2026 Pt.E Sec.1 Cl.4.1.1 · Table 1 — occupancy from the schedule in 02

Hot Water Requirement & Generation

Cl.4.14.3 sizes storage on the maximum short time demand — the morning peak — not the day's average: 50–75 L at 60 °C for a dwelling with a bath tub, 25 L for a shower or tap, and the vessel not less than 20 % in excess. Enter the dwellings served and the Standard's basis governs; the percentage-of-daily figure below is kept only as a cross-check and is not a Cl.4.14 basis.

Dwellings with Bath Tub nos.

Dwellings with Shower / Tap nos.

Bath Tub Allowance L at 60 °C (50–75)

Heaters on Common Tank nos.

Cold Feed Temperature °C

Storage Temperature °C

Storage % of daily — cross-check only

Recovery Period h

Hot Water Demand KLD

Short Time Demand L at 60 °C

Cl.4.14.3 Storage m³

Adopted Storage m³

Cold Feed Cistern m³

Heat Input kW thermal

Basis: Q = m × Cp × ΔT / t, with Cp = 4.186 kJ/kg·K and water at 1000 kg/m³. The result is heat at the point of transfer — add generation efficiency, standing loss and a simultaneity allowance before selecting a heat pump, solar thermal array or calorifier. Storage below 60 °C is a legionella risk; use thermostatic mixing at the outlets rather than lowering the store.

Nos. is the count of units the rate is multiplied by, in whatever the Basis column names — beds for a hotel, persons for an office. Enter it directly, or leave it to be computed as Rooms × Occupancy per Room. Hot and Cold are the two figures you set, and Domestic is their sum. The one you are not typing holds still, so raising the hot demand does not silently move the cold. Click ▸ on any row to open its end uses — bathing, kitchen, laundry, and so on for that building type; overwriting a rate rescales that split so the breakdown still adds up to the row. Table 1 states a minimum, so a higher rate is a legitimate design decision — the cell shows the code figure beneath it and the report lists every departure as the project’s own.

3.2 Non-Domestic & Ancillary Demands

CTI/ASHRAE · GRIHA landscape · NBC Pt.4 (fire)

Landscape & Horticulture Irrigation

Lawn / Turf Area m²

Rate L/m²/d

Shrub / Drip Area m²

Rate L/m²/d

Landscape Demand KLD

HVAC Cooling Tower Make-up

Installed Capacity TR

Circulation m³/h per TR

Range ΔT °C

Cycles of Conc. COC

Drift Loss % of circ.

Operating Hours h/day

Evaporation KLD

Drift KLD

Blowdown KLD

Total Make-up KLD

Basis: E = 0.00085 × 1.8 × ΔT(°C) × Circulation (m³/h) | B = E/(COC−1) − D | M = E + D + B = E·COC/(COC−1). Blowdown is routed to the STP inlet where quality permits; otherwise to drain.

Swimming Pool / Water Bodies

Cl.4.19 sizes the pool properly: user load from surface area, turnover rate by pool type, filter area from the filtration rate, and backwash at not less than 30 m³/m²/h. Make-up is evaporation plus that backwash. Evaporation itself carries no NBCS figure by either route — a rate over the water surface is the physical basis, a share of the pool volume is what many briefs ask for, and whichever is chosen is stated in the report as the project's own allowance.

Pool Surface Area m²

Design Water Depth m

Pool Volume m³ — blank for area × depth

Pool Type Cl.4.19.1.2

Turnover h — 0 for the table value

Filter Class Cl.4.19.4.8

Filtration Rate m³/m²/h — 0 for band default

Filter Vessels nos.

Backwash Duration min per vessel

Backwash Frequency per vessel per week

Shower area. Showers beside the pool — a supply the pool's own fill, make-up and backwash never carry. Number of showers × litres per minute is a flow: what the main and the hot water plant carry at once. It becomes a daily volume, and joins the demand, only once the minutes of use are stated. The litres per minute opens at the Standard's figure for the fittings set in 1.2.

Number of Showers nos.

Litres per Minute per shower head

Shower Demand L/min, all running

Minutes of Use per Day optional

Shower Daily Volume KLD

Evaporation Basis neither is an NBCS figure

Evaporation Rate L/m²/d

Evaporation Loss % of pool volume / day

Evaporation KLD

The other basis what it works out at

Gutter & Pipe % of pool volume

Pool Make-up KLD

Process / Industrial & Miscellaneous Demands

Description	Water Quality	Demand KLD	Return to Effluent %	Effluent KLD

Fire Fighting Static Storage (not a recurring demand)

Underground Static L

Terrace Static L

Annual Top-up % of static/yr

Equivalent Daily Top-up KLD

Per NBCS 2026 Part F — Fire and Life Safety, to which NBCS 2026 Pt.E/Sec.1 Cl.4.1.4 refers the firefighting requirement, static storage is dedicated and excluded from the daily water balance; only make-up for evaporation/testing is accounted. Fire tank first-fill must however be included in the source capacity assessment.

3.3 Consolidated Water Demand Summary

Peak day demand

3.4 Block-wise Water Demand & Design Summary

Every line in every block · Total = Q × total rate · Domestic = Total − Flushing · Wastewater = Total × return factor

4.1 Wastewater Generation — Stream-wise

NBCS 2026 Pt.E Sec.2 · CPHEEO Sewerage Manual 2013 Pt.A Cl.3.3

Return factors are editable. Default basis: domestic 85 %, flushing 100 %, kitchen 90 %, landscape 0 % (fully consumed), cooling tower — blowdown only, pool — backwash only.

4.2 Design Flow Check & STP Capacity Selection

Dual check — stream-wise vs. CPHEEO 80 % rule

Stream-wise Generation KLD

80 % of Water Supplied KLD

Governing (higher) KLD

Design Margin %

Computed Capacity KLD

Adopted STP Capacity KLD

Peak Factor

Peak Hourly Flow m³/h

4.3 Sanitary Fixture Provision — Male, Female, Accessible

NBCS 2026 Pt.E Sec.2 Cl.4.2.5.1 · Tables 1 to 17

Floors

Wards

Kitchens

Restaurants

Guest Rooms

Toilet Blocks

Accessible Provision — Basis NBCS gives no count; choose the rule

Percentage % — for the percentage basis

Stated Figure for the outright basis

Cited From the tool attaches no NBCS clause to this number

Ambulant Cubicles one per block, additional

4.4 Drainage Design

NBCS 2026 Pt.E Sec.2 Cl.4.5.3.5.1 · Tables 18, 20, 22–25

Fixture units per Table 20; stack from Table 18 by building height; branch from Table 22; building drain from Table 23 by slope; gradients from Table 24. Enter the fixture counts you have worked up from the provision schedules in the report — the tool does not derive them, because Tables 1–17 are reproduced rather than computed from.

Stack Height m — Table 18 band

Branch Intervals nos.

Building Drain Slope

Roof Area per Downpipe m² — 0 for whole roof

Fixture — Table 20	Private	Public	Unit Value	DFU	Min Trap mm

4.5 Grease Traps

NBCS 2026 Pt.E Sec.2 Cl.4.5.6 — required, and not sized by the clause

Arrangement

Retention min at peak

Kitchen Hours h/day

Peak Factor × on the kitchen line

FOG at Inlet mg/L

Pump-out Target days

Liquid Depth m

Design Globule µm

Trap Temperature °C — cooled

Service Pantries Give a small trap to pantries and tea points too — Cl.4.5.6 does not reach them

4.6 Solid Waste Management

NBCS 2026 Pt.E Sec.3 Cl.5.1 · 4.3 · 6.2.1

Cl.5.1 gives each generation rate as a range; the midpoint is used unless you enter a project rate. The total divides 60 % organic / 40 % inorganic. Waste follows people, so beds, seats and passengers contribute only through the population in the occupancy schedule.

Residential kg/cap/d — 0.3–0.6

Commercial kg/cap/d — 0.2–0.6

Institutional kg/cap/d — 0.25–0.6

Street Sweeping kg/cap/d — 0.34–0.7

Street Population persons

Meals Served per day

Building Storeys Cl.4.3.1 chute trigger

Total Solid Waste kg/day

Organic Fraction kg/day

Composting Area m² — Cl.6.2.1

5.1 Plants & Occupancy Grouping

Any number of plants; each occupancy drains to the one you assign it to

Which occupancy drains to which plant

5.2 Influent Characteristics & Treated Water Standard

CPHEEO 2013 Pt.A Table 3.5 · NGT dt.30.04.2019

5.3 Technology Selection Matrix

Weighted evaluation — capacity, footprint, reuse, O&M

Plant Location

Available Footprint m²

0 = unconstrained

Reuse Intent

Selected Technology

Comparison Sheet auto-generated for this project

Show

Electricity Tariff ₹/kWh

0 = show kWh only

Benchmark Capital Rate ₹/KLD

For the cheapest route on the sheet

Steam Rate ₹/tonne

ZLD evaporation only

Evaluation Period years

5.4 Unit Process Design & Sizing

CPHEEO 2013 Pt.A Ch.5 · Metcalf & Eddy

5.5 Aeration, Sludge & Power

Oxygen demand · sludge yield · connected load

5.6 Equipment Schedule — STP

6.1 Treatment Train Requirement — driven by source analysis

IS 10500:2012 acceptable / permissible limits

6.2 Water Treatment Plant (WTP)

CPHEEO Water Supply Manual · IS 8419

WTP Capacity KLD

Clarifier CPHEEO 2024 Table 8.5 / 8.6

Design Water Temperature °C — Table 8.4

Operating Hours h/day

Alum Dose mg/L

Chlorine Dose mg/L

Backwash Loss %

6.3 Water Softening Plant

Strong Acid Cation (Na⁺ cycle) · IS 8419 Pt.2

Soft Water Demand KLD

Operating Hours h/day

Feed Total Hardness mg/L CaCO₃

Resin Op. Capacity g CaCO₃/L

Range 40–70 (≈18–30 kgr/cft)

Regenerations / day

Salt Dose g NaCl/L resin

6.4 Reverse Osmosis Plant

Brackish water RO · IS 10500 permeate target

Permeate Required KLD

Operating Hours h/day

Recovery %

Design Flux LMH

Element Type

Salt Rejection %

6.5 Demineralisation (DM) Plant

SAC + Degasser + SBA (+ Mixed Bed)

DM Water Demand KLD

Operating Hours h/day

Configuration

SAC Op. Capacity g CaCO₃/L

SBA Op. Capacity g CaCO₃/L

Regenerations / day

7.1 Effluent Source & Characterisation

EPA 1986 Sch.VI (CPCB General Standards)

Industry / Effluent Category

Effluent Flow KLD

Discharge Route

7.2 Process Route — Selection and Comparison

Derived from the effluent's own BOD:COD, COD, oil load and TDS

Process Route

Show

7.3 Recommended Treatment Scheme

7.4 Zero Liquid Discharge Block

RO → MEE → ATFD

8.1 Water Mass Balance Schematic

All flows in KLD (m³/day), peak-day basis

Fresh / Potable water Softened / DM / RO water Raw wastewater / effluent Treated & recycled water Losses / disposal

8.2 Mass Balance Reconciliation

Inflow = Outflow ± storage

9.1 Water Storage Schedule

NBCS 2026 Pt.E Sec.1 Cl.4.4.10 · Part F (fire)

UG Domestic Storage days

Overhead Storage fraction of day

Treated Water Storage hours

Raw Water Storage days

Municipal Water Supply tested against the UG days — Cl.4.4.10

9.2 Pump Schedule

Duty + standby; head computed per CPHEEO Pt.A where a pipe run is entered

UG Tank Depth m below ground

Pump House Location IS 15301 Cl.6.9

Pumping hours — each sets the hours a transfer pump's day is pumped in, so its duty flow is the daily volume ÷ these hours

Raw water transfer h/day

Domestic transfer h/day

Flushing transfer h/day

Landscape irrigation h/day

STP filter feed h/day

Treated water transfer h/day

10.1 Rainwater Harvesting & Recharge

CGWA 2020 · MoEFCC EIA Notification 2006 · IS 15797

City RWH Manual 2019 Table 1 (IMD)

Annual Rainfall mm — overridden by City

Terrain CGWB Table 5

Downpipe Sizing Basis

Roof Area m²

Building Perimeter m — spreads the downpipes

Paved Area m²

Green Area m²

Peak Hourly Rainfall mm/h

Design Storm IRC:42 Cl.6

Recharge Structure IRC:42 Ch.10

Soil infiltration, IRC:42 Ch.10

Pit L × W × D m

Intake per Recharge Structure m³/h

Shaft 10–20; trench 4–8. Confirm by percolation test.

10.2 Storm Water Calculation

NBCS Cl.4.5.11.2 · IRC:42 Cl.6.3, 6.4.2 · IRC:SP:13

Intensity Route

Stated Intensity mm/h

1-hour Intensity mm/h — for Table 6.1

24-hour Extreme mm — CWC iso-pluvial, NOT annual

Return Period years

Road Category IRC:42 Cl.7.1.4 — estate roads

Storm Total F cm — for IRC:SP:13

Storm Duration T h — for IRC:SP:13

Time of Concentration by

Inlet Time min — NBCS 5 to 30

Flow Path L km — IRC:SP:13

Fall H m — IRC:SP:13

Flow Path L m — Kirpich

Catchment Slope Kirpich

Slope Unit the source states none

IRC:SP:13 Constant

IRC:SP:13 Tc Unit the source states none

Connects to Public Drain Cl.4.5.11.5 floor

Outside Lower Gangetic Basin

Roof per Downpipe m² — 0 uses whole roof

Adjacent Wall Area m²

Adjacent Walls Cl.4.5.11.6.8 Notes

10.3 Storm Water Storage

A volume to hold on site — a green rating requirement, not a code one

Target

Percentile Depth mm — from local daily records

Event Duration h — for recharge capacity

Green Roof Area m²

Green Roof Retention mm

Detention Tank / Basin m³

Permitted Release L/s — 0 if unset

11.1 Green Rating — Water Performance Scorecard

LEED v4.1 BD+C · IGBC GNB v3.0 · GRIHA v2019 — water credits only

Indoor Reduction on LEED's Baseline % — 0 = not computed

LEED measures against its own fixture schedule, not the NBCS rate

Native / Drought-tolerant Planting % of landscape

Design Commitments

Building-level water metering Sub-metering, two or more subsystems Drip / sub-surface irrigation with controls

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