Bathroom Electrical Load Chart
This page documents the expected electrical loads for the bathroom, separated into 12V DC and 120V AC circuits.
Values are based on typical or estimated usage and can be updated as specific appliance models are finalized.
The goal is to understand circuit loading, plan wiring sizes, and avoid overloading any single circuit.
1. 12V DC Loads
| Device | Estimated Power (W) | Estimated Current (A @ 12V) | Circuit / Notes |
|---|---|---|---|
| 12V Water Pump | 60–120 W (active) | 5–10 A | Dedicated 12V pump circuit; intermittent load |
| Bathroom Roof Exhaust Fan (14″ Air Max) | 24–60 W | 2–5 A | Dedicated or shared 12V fan circuit |
| LED Bathroom Lighting | 6–18 W | 0.5–1.5 A | 12V lighting circuit |
| Composting Toilet Fan (Nature’s Head) | 2–3 W | 0.15–0.25 A | Continuous low draw; can share with lighting |
| Hot Water Heater Controls (if applicable) | Varies by model | 0.5–2 A | Only applies to propane or hybrid heaters |
Note: The water pump and roof fan are the primary 12V loads in the bathroom. The composting toilet fan is a continuous but very low draw.
2. 120V AC Loads
| Device | Estimated Power (W) | Estimated Current (A @ 120V) | Circuit / Notes |
|---|---|---|---|
| Washer/Dryer Combo (COMFEE 24″) | 1,000–1,500 W | 8–13 A | Dedicated 15A or 20A circuit recommended |
| Hot Water Heater (Electric Tank or Hybrid) | 1,000–1,500 W (typical) | 8–13 A | Dedicated circuit; varies by model |
| Bathroom GFCI Outlet | Up to 1,500 W (combined) | Up to 12–13 A | Required by code; supports grooming appliances |
| Misc. Bathroom Accessories | Varies | Varies | Hair dryer, shaver, etc. — GFCI protected |
Note: The washer/dryer combo is the dominant 120V load in the bathroom. The hot water heater load depends on final model selection.
3. Circuit Planning Summary
- 12V: Water pump, roof fan, toilet fan, lighting, heater controls
- 120V: Washer/dryer (dedicated), hot water heater (dedicated), GFCI outlet
- Safety: GFCI protection, proper grounding, labeled circuits
As appliance selections are finalized, this load chart will be updated with actual nameplate ratings and final circuit assignments.