Quiet power for big buildings, Nibe F1345 makes geothermal heating scalable

Reviewed: ad hoc news B2B & Pro desk. Edited and checked on 2026-06-20, 13:17. Details in the imprint.

The Nibe F1345 stands in a basement or plant room like a tall, white cabinet, humming quietly while it pushes geothermal heat through entire schools, offices or residential blocks. It is a commercial ground-source heat pump aimed at serious, all-year heating duty.

What the F1345 is built for

At its core, the Nibe F1345 is a brine-to-water heat pump designed for larger residential and commercial buildings using boreholes, surface collectors or groundwater as the heat source. Official Nibe product documentation describes the unit as a powerful, flexible solution for multi-family and commercial properties.

Depending on the chosen variant, the F1345 covers output sizes roughly from 24 to 60 kW per unit, with two compressors inside each cabinet that can stage up or down for efficiency and redundancy. Nibe lists four main output classes to match different project scales.

Modular power for bigger projects

Installers can cascade several F1345 units together, turning a neat row of white cabinets into a plant able to deliver hundreds of kilowatts of heating capacity for an entire complex. Nibe highlights the ability to connect multiple ground-source units for larger systems.

Because each heat pump has two compressors, the system can run on partial capacity during mild weather, which reduces cycling and allows quieter, more efficient operation for much of the year.

Controls, comfort and integration

On the front of the F1345, a color display and simple button layout give technicians a clear view of temperatures, operating modes and alarms without diving into a laptop every time.

The controller supports connection to external BMS systems via Modbus and similar interfaces, which is crucial when the heat pump must cooperate with ventilation units, backup boilers or peak-load district heating in complex buildings.

Efficiency and climate credentials

Ground-source systems like the Nibe F1345 typically deliver higher seasonal performance than air-source units in colder climates, because the ground temperature stays more stable than winter air. The International Energy Agency notes that well-designed ground-source heat pumps can reach high seasonal efficiencies in suitable soils.

For building owners under pressure from rising carbon prices and stricter building codes, that higher efficiency can translate into lower operating costs and easier compliance with CO? targets over the system’s lifetime.

Installation realities and limitations

The F1345 does not escape the classic downside of ground-source heat pumps: you need boreholes, trenches or groundwater wells, which means drilling rigs, permits and serious upfront planning effort.

In dense city centers or on tiny plots, that can be a dealbreaker and push planners toward air-to-water systems instead, even if the long-term efficiency of the F1345 style solution would be attractive on paper.

Where it fits in Nibe's lineup and stock context

Nibe places the F1345 as a professional, project-driven product above its smaller residential ground-source units, targeting installers and developers who work on multi-family buildings, public facilities and commercial real estate with long investment horizons.

Shares of Nibe Industrier AB (SE0015988019) trade on Nasdaq Stockholm under the ticker NIBE; a current, reliable real-time price in SEK was not available at verification time, so no up-to-the-minute quote can be stated here.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.