Building Systems
HVAC Energy Consumption Calculator
❄️🔥 BTU/h · kWh
Calculate heating/cooling loads, energy consumption, and operating costs for HVAC systems.
System Type
HVAC Mode
Select cooling or heating mode for the system
System Type
Different system types have different efficiency ranges
Load & Efficiency
Cooling/Heating Load
BTU/h
Required cooling or heating capacity (BTU/h)
Efficiency Rating
SEER
SEER rating for cooling (higher = more efficient)
Daily Runtime
h/day
Average daily operating hours
Cost Analysis
Electricity Rate
$
/kWh
Cost per kilowatt-hour (kWh)
Days per Month
days
Number of operating days per month
Energy
0kWh
Monthly Energy Consumption
0 kWh
kWh per month
System Capacity
0 kW
Daily Energy
0 kWh
Monthly Cost
$0
Annual Cost
$0
📊 Detailed Breakdown
| Parameter | Value | Unit |
|---|
How the formula works
Power (kW) = Load (BTU/h) ÷ (Efficiency × 3.412) | Energy (kWh) = Power (kW) × Runtime (h)
- Power Consumption (kW) = Load (BTU/h) ÷ (Efficiency Rating × 3.412)
- Daily Energy (kWh) = Power (kW) × Daily Runtime (h)
- Monthly Energy (kWh) = Daily Energy × Days per Month
- Monthly Cost = Monthly Energy × Electricity Rate
- Cooling Efficiency (SEER): Higher = more efficient (typical: 13-22)
- Heating Efficiency (HSPF): Higher = more efficient (typical: 7-13)
- 1 kW = 3,412 BTU/h
- Central AC: 13-22 SEER | Split System: 14-24 SEER | Window Unit: 10-15 SEER | Heat Pump: 14-22 SEER