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IS 2082:1993 & PPAC Calorific Benchmark Engine

Electric Geyser vs Gas Geyser Running Cost Calculator

Calculate exact monthly running costs, thermal efficiencies, and fuel savings between Electric Storage Geysers, LPG Gas Cylinders, and PNG Piped Gas Water Heaters.

IS 2082:1993 & PPAC Calorific Standard Engine

Electric Geyser vs Gas Geyser Running Cost Calculator

[REPRESENTATIVE INDUSTRY BENCHMARK]
⚡ Electric Storage Geyser
₹1015.63 / mo
137.77 kWh / month (92% Eff)
🔥 LPG Gas Geyser
₹843.95 / mo
0.993 Cylinders / month (58% Eff)
🛢️ PNG Piped Gas GeyserCHEAPEST
₹765.22 / mo
15.78 SCM / month (62% Eff)
🔥

Geyser Fuel Savings Winner: PNG GAS_GEYSER

PNG Piped Gas saves ₹250.41 per month over Electric Geysers at current tariffs (₹3004.92 / year savings!).

₹765.22 / mo

🧾 Step-by-Step Thermal Calculation Audit Proof

Useful Thermal Energy Demand (Q_useful)
100L/day × 0.001163 × (45°C - 15°C) = 3.489 kWh/day
104.67 kWh useful thermal heat / month
Electric Storage Geyser Consumption & Cost
(104.67 kWh ÷ 92%) + (0.8 kWh/day × 30d) = 137.77 kWh/mo
₹1015.63 / month (137.77 Units @ ₹7.37/unit)
LPG Gas Geyser Consumption & Cost
104.67 kWh ÷ (181.76 kWh/cyl × 58%) = 0.993 Cylinders/mo
₹843.95 / month (0.993 Cylinders @ ₹850/cyl)
PNG Piped Gas Geyser Consumption & Cost
104.67 kWh ÷ (10.7 kWh/SCM × 62%) = 15.78 SCM/mo
₹765.22 / month (15.78 SCM @ ₹48.5/SCM)
IS 2082 & PPAC Water Heating Disclosure:
  • Thermal water heating energy equations follow IS 2082:1993 and BEE Star Labeling Schedule 1 test standards.
  • 14.2 kg LPG cylinder calorific baseline: 46.1 MJ/kg (181.76 kWh gross). Domestic PNG calorific baseline: 38.5 MJ/SCM (10.7 kWh gross/SCM).
  • Calculated energy and cost figures preserve double precision internally while rounding presentation values.
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Electric Geyser Power Calculator

Calculate standing heat loss and electricity costs for electric water heaters.

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Solar Water Heater Payback Calculator

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Universal Unit Converter Hub

Convert MJ to kWh and SCM gas volume calculations.

How Geyser Running Costs are Calculated Across Fuels

Running costs are determined by equating the delivered useful thermal energy demand (Q_useful) required to heat water against fuel calorific values and appliance thermal efficiencies under IS 2082 and IS 15558 standards.

Q_useful (kWh/day) = Liters/day × 0.001163 kWh/(L·°C) × (Target°C - Inlet°C)
Electric Monthly Cost (₹) = ((Q_useful ÷ 92%) + Standing Loss 0.8kWh) × 30 days × Electricity Tariff Rate
LPG Monthly Cost (₹) = (Q_useful_monthly ÷ 105.42 kWh/cyl) × LPG Cylinder Price (₹850)
PNG Monthly Cost (₹) = (Q_useful_monthly ÷ 6.634 kWh/SCM) × PNG Tariff Price (₹48.50/SCM)
Worked Example (100L/day @ 45°C): Electric ₹1,033.28/mo vs LPG ₹844.05/mo vs PNG ₹765.33/mo!

Electric vs LPG vs PNG Geyser Fuel Comparison Table

Geyser TechnologyThermal Eff %Monthly Fuel DemandMonthly Cost (100L/day)Annual Running Cost
5-Star Electric Storage Geyser92% (+Standby)137.77 kWh / month₹1,033.28 / month₹12,399.36 / year
LPG Instant Gas Geyser58%0.993 Cylinders / month₹844.05 / month₹10,128.60 / year (Saves ₹2,270/yr)
PNG Piped Gas Geyser62%15.78 SCM / month₹765.33 / month₹9,183.96 / year (Saves ₹3,215/yr!)
Electric Geyser vs Gas Geyser Running Cost Calculator | BijliWise