How Quiet Is the Hoval Belaria pro?

In commercial and multi residential developments, acoustic performance is not a secondary consideration. It can determine whether a project gains planning approval, whether mitigation measures are required and ultimately whether a scheme remains financially viable.

For consultants and designers, the question is straightforward:

Can this heat pump be installed without creating a future noise issue?

The Hoval Belaria pro has been engineered specifically to address that concern.

Heat pumps are increasingly installed in:

• Densely built urban environments

• Residential complexes

• Care facilities and healthcare settings

• Schools and public buildings

• Rooftop plant installations

In these applications, a few decibels can make the difference between compliance and costly redesign.

Acoustic assessments, particularly under BS 4142, rely on accurate declared sound power levels. Manufacturers who provide transparent, standardised data make specification and modelling far more reliable.

The Belaria pro has been tested in accordance with EN 12102.

Declared sound power levels for the outdoor units are:

• 55–56 dB(A) depending on model

• Maximum day operation levels of 62–65 dB(A)

Across the 20, 25, 40 and 50 kW models, the sound power level remains tightly controlled despite outputs of up to 48 kW per unit.

Importantly, sound power level is measured in controlled laboratory conditions and is not affected by distance or installation environment. This makes it the correct figure for use in acoustic modelling and planning submissions.

For consultants, that means predictable performance rather than uncertainty.

Low acoustic performance is not achieved by limiting output. It is achieved through engineering.

The Belaria pro incorporates:

• Compressor mounted on sound absorbing mounts

• Low vibration mechanical design

• Additional encapsulation around acoustic components

• Specially soundproofed outdoor casing

• Vibration damping feet as standard

• Forward air discharge directed towards the ground

The forward discharge design is particularly beneficial for rooftop installations, as it reduces upward sound projection towards upper storeys.

Structure borne noise is addressed through vibration decoupling, allowing installation directly onto roof slabs without excessive secondary isolation measures in most applications.

Commercial heating systems rarely operate continuously at full load. Most of the year is spent at part load.

The inverter driven compressor technology within the Belaria pro ensures:

• Output matches demand

• Fan speeds reduce at lower loads

• Cycling is minimised

This significantly reduces sudden acoustic peaks and improves overall acoustic comfort.

In practice, this is just as important as the declared maximum sound power figure.

Declared sound power provides a reliable baseline. However, consultants should also consider:

• Distance from receptors

• Reflective building surfaces

• Installation height

• Screening and acoustic barriers

• Operating load and ambient temperature

By providing measured sound power data under recognised standards, the Belaria pro allows accurate modelling during the design phase, reducing the likelihood of unexpected mitigation costs later.

Heat pumps intended for large buildings must balance output and acoustic performance.

With scalable outputs from 20 to 200 kW in cascade and tightly controlled sound power levels, the Belaria pro offers a solution suitable for:

• Residential developments

• Commercial properties

• Public sector buildings

• Retrofit schemes in noise sensitive areas

For planners and consultants, that means confidence at specification stage and fewer surprises during commissioning.