Exhaust air heat pump S735

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Overview
The NIBE S735 is an inverter-controlled exhaust-air heat pump with an integrated hot water heater, delivering heating, hot water and ventilation in a single compact unit. Designed for new builds and replacements, it uses a low‑GWP natural refrigerant and adapts automatically to building heating demand. Integrated WiFi and myUplink connectivity enable remote monitoring, software updates and smart operation.

Key features

• Inverter-controlled exhaust-air heat pump with integrated hot water heater
• High seasonal performance factor for reduced operating costs
• Natural refrigerant with very low global warming potential (GWP)
• Integrated WiFi and myUplink connectivity for remote control and smart services (e.g., Weather Forecast Control, Smart Price Adaption)
• Smart Price Adaption (SPA) to adapt operation to variable hourly electricity prices (requires time-of-use contract and myUplink connection)
• Insulated integrated hot water heater; optional accessories for increased hot water volume
• High hot water capacity: up to 264 litres at 40 °C
• User-friendly colour touchscreen with intuitive interface
• Low noise level and compact format for simplified placement and installation
• Can be docked to other heat sources; compatible with a supply air module for combined exhaust and supply ventilation

Functions & advanced functions

• Expandable functions via accessories for heating, ventilation and solar integration
• Smart Price Adaption (SPA) to reduce variable electricity costs by adapting operation to predicted prices
• Integrated hot water heater with optional kits to increase stored hot water volume
• myUplink app integration: system overview, push notifications and email alerts for faults, remote control, automatic software updates and connection to smart home services (e.g., Google Home)

Accessories (selected)

• NIBE AXC 20
• NIBE BAU 10 (wall console)
• NIBE CAB S12 (floor cabinet to support SAM S42)
• NIBE CDS 10 (wireless CO2/temperature/humidity sensor)
• NIBE DEW S42 (docking kit for VPB S200 hot water cylinder)
• NIBE DEW S43
• NIBE DKI S10 (division kit for low ceiling installations)
• NIBE EF 45 (extension frame)
• NIBE EME 20 (communication module Modbus RTU → Modbus TCP/IP)
• NIBE ECS 40
• NIBE OEK S20 (mixes outdoor air with exhaust stream to increase usable heating capacity)
• NIBE ROT 10 (wireless room thermostat)
• NIBE RPP 10 (signal repeater)
• NIBE SAM S42 (supply air module for tempered supply air ventilation)
• NIBE SRV 10 (wireless radiator thermostat)
• NIBE ECS 41 (kit for additional heating circuits)
• NIBE THS 10 (wireless temperature & humidity sensor)
• NIBE TOC 40 (top cabinet variants)
• NIBE RMU S40 (remote room unit with 2.8" touch display)

Documents available (by type)

• User manual (UHB) — multiple voltage variants
• Installer manual (IHB)
• Product leaflets (PBD)
• Product catalogue - Exhaust air
• Energy labels for variants
• Consumer information leaflet (CIL)

Specifications

• Model variants: NIBE S735-4; NIBE S735-7
• Height: 2025 mm
• Width: 600 mm
• Depth: 620 mm
• Net weight: 200 kg
• Product efficiency class, room heating 35 °C: A+++
• Product efficiency class, room heating 55 °C: A++
• Efficiency class water heating: A
• Refrigerant amount, CO2 equivalent: 0.0009 ton
• Declared tap profile: XL
• High hot water capacity: up to 264 litres at 40 °C