NIBE S735-7 Exhaust Air Heat Pump

Description

The NIBE S735 is a modern, inverter-controlled exhaust air heat pump designed to provide optimal indoor comfort and energy-efficient operation year-round. The heat pump ventilates the home, recovers heat energy from the exhaust air, and produces both pleasant indoor heating and an abundant supply of hot water. Thanks to intelligent inverter technology, operation automatically adjusts to the household's current needs, resulting in low operating costs and a consistent indoor temperature regardless of the season.

Note! Velltra guarantees that all NIBE products marketed and sold by us are manufactured in Sweden and contain top-quality components specifically adapted for the Nordic market and its challenging climate.

Eco-friendly technology with natural refrigerant

The NIBE S735 operates using the natural refrigerant R290 (propane), which has an exceptionally low climate impact and an extremely low GWP (Global Warming Potential) value. This makes the system a future-proof choice for environmentally conscious homeowners who wish to combine high performance with care for nature and the climate.

High hot water comfort and tailored corrosion protection

The built-in water heater is insulated with eco-friendly cellular plastic to minimize energy loss and delivers up to 264 liters of hot water at 40°C (rated XL draw-off profile). To ensure maximum service life regardless of water quality, the model is available in three versions:

• Copper (Cu): The standard choice, ideally suited for most municipal water systems with normal pH levels.
• Stainless steel (R): Optimal for soft, low-calcium water or certain types of private well water with a slightly acidic pH.
• Enamel (E): Recommended for hard, calcium-rich water or water with high chloride and salt content, as the enamel coating provides highly durable protection.

Intelligent control and connected flexibility via myUplink

With built-in wireless connectivity and the myUplink app, heating can be conveniently monitored and controlled directly from a smartphone or tablet. The system supports smart features such as weather-forecast-based control and integration with smart home systems via voice control.

The NIBE Smart Price Adaption function allows the heat pump to retrieve current hourly electricity prices from the Nord Pool Spot exchange. With a variable hourly rate contract, the unit automatically schedules operation to heat the home when electricity prices are most favorable, potentially reducing variable energy costs by 5 to 10 percent.

Compact size, quiet operation, and easy installation

Featuring a stylish Scandinavian design, low noise levels, and dimensions tailored for standard spaces (600 mm wide and 620 mm deep), the unit blends naturally into laundry rooms and utility areas. The model is optimized for both new construction and as a replacement when upgrading older exhaust air heat pumps. When supplemented with a supply air module, it also works excellently in properties with mechanical supply and exhaust ventilation.

Warranty and peace of mind

Please note that the manufacturer’s full warranty is not applicable for units bought in Sweden and installed outside Sweden.

A secure purchase and delivery with Velltra Velltra is a pioneer in the heat pump industry and has delivered thousands of units to satisfied customers across the EU over the years. When you shop with us, your investment is secure every step of the way. All our shipments are fully insured against transit damage, ensuring a quick and smooth resolution process should any damage occur during transport.

Technical specifications

• Dimensions (WxDxH): 600 x 620 x 2025 mm
• Installation height: 2005 to 2050 mm (adjustable feet 20–50 mm)
• Ventilation duct connections: 125 mm and 160 mm diameter
• Pipe connections: 22 mm
• Refrigerant: R290 (0.42 kg, CO2 equivalent 0.00126 tonnes)
• Electrical connection: 3x400V
• Max. operating pressure: 2.5 bar (heating circuit) / 9 bar (domestic hot water)
• Function: Exhaust air heat pump for heating, domestic hot water, and ventilation heat recovery
• Energy efficiency class – space heating (35 °C): A+++
• Energy efficiency class – space heating (55 °C): A++
• Domestic hot water draw-off profile: XL
• Weight: Cu: 229 kg | R: 213 kg | E: 248 kg
• COP at 7/35 °C (EN 14511): 2.7 (for S735-7 E)
• Surface finish and color: White powder-coated sheet steel
• Control system: Color touchscreen, myUplink app, room temperature control, and support for wireless smart accessories