Is Gas Geyser cheaper to run than Electric Geyser in India?

Yes. At standard residential tariffs (₹7.50/unit electricity vs ₹48.50/SCM PNG vs ₹850 LPG cylinder), PNG Piped Gas Geysers are ~25% to 30% cheaper to run than 5-Star Electric Storage Geysers (~₹765/month PNG vs ~₹1,033/month Electric for 100L daily hot water).

How much LPG gas does a Gas Geyser consume per month?

Heating 100 Liters of hot water daily (temperature rise 30°C) consumes approximately 0.99 14.2kg LPG cylinders per month (~1 cylinder per month).

When does an Electric Geyser become cheaper than a Gas Geyser?

In states or municipal areas with heavily subsidized domestic electricity rates (e.g. ₹3.00 to ₹5.00 per unit under schemes like Gruha Jyothi or Delhi Subsidy), Electric Geysers become cheaper to operate than LPG cylinders.

What standards govern water heater testing in India?

Electric water heaters follow IS 2082:1993 and BEE Star Labeling Schedule 1 standards, while gas water heaters follow IS 15558 standards and PPAC calorific baselines.

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]

Daily Hot Water Demand (Liters/day)

Inlet Cold Water Temp (°C)

Target Hot Water Temp (°C)

LPG Refill Price (₹ / 14.2 kg Cylinder)

PNG Piped Gas Price (₹ / SCM)

Electricity Tariff Bridge

⚡ 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)

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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

Calculate ROI and payback period for rooftop solar water heating systems.

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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 Technology	Thermal Eff %	Monthly Fuel Demand	Monthly Cost (100L/day)	Annual Running Cost
5-Star Electric Storage Geyser	92% (+Standby)	137.77 kWh / month	₹1,033.28 / month	₹12,399.36 / year
LPG Instant Gas Geyser	58%	0.993 Cylinders / month	₹844.05 / month	₹10,128.60 / year (Saves ₹2,270/yr)
PNG Piped Gas Geyser	62%	15.78 SCM / month	₹765.33 / month	₹9,183.96 / year (Saves ₹3,215/yr!)

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