NIBE S735-4 Exhaust Air Heat Pump

Description

NIBE S735-4 is an intelligent and modern inverter-controlled exhaust air heat pump with integrated hot water heater, created to provide the home with heating, hot water and ventilation in a resource-efficient and reliable way. Thanks to advanced speed control, the unit automatically adapts its output to the property's actual heating needs around the clock. The model uses a natural refrigerant with a very low climate impact, making it a well-thought-out and environmentally friendly choice for the future. With an exceptionally high annual heating factor, operating costs are kept down, while the compact design and low noise level facilitate easy placement in both new buildings and when replacing existing installations.

NOTE! Velltra assures that all NIBE products marketed and sold by us are manufactured in Sweden and contain components of the highest quality, especially adapted for the Nordic market and its challenging climate.

High annual heating factor and energy-efficient inverter technology

The modulating compressor continuously adjusts the capacity to optimize energy use at every moment. This results in an even indoor temperature and significant energy savings all year round. NIBE S735-4 is optimized for heating newly built properties up to 240 m2 and for replacement installations in houses up to 200 m2. If preheated supply air is required, the system can be supplemented with the NIBE SAM S42 supply air module for a complete mechanical exhaust and supply air system.

Environmentally friendly refrigerant with minimal climate impact

With a focus on long-term sustainability, the heat pump works with a natural refrigerant. The very low GWP factor (Global Warming Potential) means a minimal carbon footprint, corresponding to only 0.0009 tons of CO2 equivalents. This guarantees a future-proof heating solution that meets modern environmental requirements without compromising on capacity or reliability.

Smart connectivity and full control via the NIBE S-series

As part of the NIBE S-series, the pump is equipped with integrated wireless connection via WiFi and an intuitive touchscreen. The system communicates seamlessly with the cloud-based myUplink service and provides a full overview of temperatures, scheduling and operating status directly via mobile phone or tablet. The intelligent technology learns the household's consumption patterns and can connect wireless room sensors for even better comfort and fine-tuning.

Quiet operation, good hot water capacity and flexible design

The heat pump's mechanical damping and well-insulated casing ensure a very low noise level during operation, making it ideal for placement in a laundry room or utility room. The integrated water heater delivers plenty of hot water in a declared tap profile XL, covering the needs of both everyday use and larger families. The outer casing is fire-lacquered in classic white steel and measures a standardized 60 centimeters wide for easy integration into cabinet interiors.

Warranty and Swedish manufacturing quality

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

Secure business and delivery with Velltra Velltra is a pioneer in heat pumps and has delivered thousands of units to satisfied customers throughout the EU over the years. When you shop with us, your investment is safe all the way. All our shipments are always insured for transport, which guarantees extra fast and smooth handling if transport damage should occur.

Technical specifications

Common technical data:

• Width: 600 mm
• Depth: 620 mm
• Height: 2025 mm
• Connection dimension: 22 mm connection
• Electrical connection: 3x400 V
• Operating pressure: 2.5 bar (heating system) / 9 bar (tap water)
• Function: Exhaust air recovery and heating (air/water)
• Color and surface: White, powder-coated steel sheet
• Refrigerant quantity: Equivalent to 0.0009 tonnes of CO2 equivalents
• Efficiency class hot water preparation: A
• Product efficiency class space heating, 55 °C: A++
• Product efficiency class space heating, 35 °C: A+++
• System efficiency class space heating, 55 °C: A++
• System efficiency class space heating, 35 °C: A+++
• Declared tap profile: XL

Model variants:

NIBE S735-4 Cu (Copper-lined water heater):

• Vessel material: Copper
• Net weight: 200 kg
• Mainly recommended for water qualities with normal carbon dioxide and lime content.

NIBE S735-4 R (Stainless steel water heater):

• Vessel material: Stainless steel
• Net weight: 200 kg
• Well suited for low pH values or soft water.

NIBE S735-4 E (Enameled water heater):

• Vessel material: Enamel
• Net weight: 235 kg
• Equipped with sacrificial anode, adapted for water with higher chloride and salt contents.