250L Air Source Heat Pump Water Heater

250L Air Source Heat Pump Water Heater — For Larger Households

Households with 4–6 members or those with high hot water usage (dishwashers, multiple bathrooms, frequent bathing) need a larger capacity heat pump water heater. The 250L unit provides the hot water volume a large family needs while delivering the same 65–75% electricity savings that make heat pump water heaters the most cost-effective hot water solution available in South Africa today.

Key Specifications

• Tank Capacity: 250 litres
• Heat Pump Power Input: 700W (producing 2.45kW thermal output at COP 3.5)
• COP Rating: 3.5–4.8 (ambient dependent)
• Operating Temperature Range: 5°C to 45°C ambient
• Maximum Water Temperature: 65°C
• Tank Material: SUS304 stainless steel inner tank
• Insulation: 55mm polyurethane foam
• Refrigerant: R410A
• Noise Level: Under 55dB
• Warranty: 2 years heat pump, 5 years tank

Sizing the Right Tank for Your Household

Hot water demand is typically calculated at 35–50 litres per person per day. A household of 4 people needs 140–200 litres daily; a household of 5-6 needs 175–300 litres. The 250L tank provides comfortable margin for a family of 5–6, handles morning peaks without running out, and the large tank volume means the heat pump can run overnight or during solar production hours to heat the full tank at the cheapest possible time.

Annual Savings

A 250L electric geyser consumes approximately 2,000–2,800kWh annually. At current rates of R3.50–R4.50/kWh, this costs R7,000–R12,600 per year. The 250L heat pump water heater reduces this by 70%, saving R4,900–R8,820 annually. Payback on the additional cost versus a conventional geyser typically occurs in 2–3 years.

Smart Timer Integration

The 250L heat pump includes a programmable timer allowing you to set heating schedules. Programme it to heat during off-peak Eskom TOU periods (typically 10pm–6am) to take advantage of reduced off-peak electricity tariffs where available, or during peak solar generation hours (10am–2pm) if you have rooftop solar. This simple programming maximises your savings without any complex smart home integration.

FAQ

Is the 250L or 200L tank better for a family of 4?

A family of 4 with one bathroom can usually manage on a 200L tank. If you have two or more bathrooms, a dishwasher, or teenagers with long showers, the 250L tank provides greater peace of mind. The additional 50 litres also means the heat pump can run a single heating cycle to fill the tank rather than multiple cycles, which is more efficient.

Can two heat pump water heaters be installed in series?

Yes. For very large properties (game lodges, guesthouses, large commercial kitchens) with hot water demand exceeding 250L per session, multiple heat pump units can be installed in parallel or series. Contact us to discuss commercial hot water solutions.

What happens during an extended cold snap?

The heat pump operates effectively above 5°C ambient. During winter cold snaps in high-altitude areas, if the ambient temperature drops below 5°C, the backup electric element activates automatically at full power to maintain water temperature. This is rare in most South African locations.