Calculate Your Savings

Enter your demand, current costs, and conditions below. Our calculator will recommend the best heat pump system and show your annual savings, payback period, and CO₂ reduction.

See Your Savings Instantly

Drag the sliders to get an instant estimate — then use the full calculator below for a detailed breakdown

Currency
Daily Hot Water Volume3,500 L
500 L5,000 L10,000 L20,000 L
Your Current SystemElectric Resistance
ElectricLPG BoilerDiesel Boiler
$1,022 Your Current Monthly Cost
$250 With iHEAT R290 Monthly
$772 Monthly Saving
$9,261 Estimated Annual Saving
Calculation Assumptions & Energy Prices Used

Energy Prices

$ USD₱ PHP£ GBP€ EUR
Electricity (grid)$0.21/kWh₱12.25/kWh£0.17/kWh€0.19/kWh
LPG$25/9kg₱950/11kg£20/13kg€22/11kg
Diesel$1.00/L₱119/L£1.30/L€1.40/L
Natural Gas$0.05/kWh₱7.00/kWh£0.07/kWh€0.11/kWh

System Performance

  • iHEAT R290 COP: 4.0 (rated at EN 14511 conditions, ambient 20°C, ΔT 40K)
  • Diesel boiler efficiency: 85% (CIBSE Guide F)
  • LPG boiler efficiency: 90%
  • Electric resistance COP: 1.0
  • Water specific heat: 1.163 Wh/(L·K) (ASHRAE Fundamentals Ch.33)

Emissions Factors

  • Grid electricity: 0.712 kg CO₂/kWh (Philippines DOE) / 0.207 kg (UK DEFRA 2024)
  • Diesel: 0.25 kg CO₂/kWh heat
  • LPG: 0.23 kg CO₂/kWh heat

Prices as of April 2026. Actual savings depend on local energy tariffs, usage patterns, and site conditions. Contact us for a site-specific assessment.

Detailed System Calculator

Custom system sizing with annual savings, payback period, and CO₂ reduction

1. Your Demand

2. Your Costs

3. Conditions & Options

Estimate Hot Water Use

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Our calculator provides estimates based on typical conditions. Contact our engineering team for a detailed site survey, custom system design, and firm pricing.

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