A) The process of establishing even distribution of heat throughout a heating system.
A) There are two main ways of balancing a heating system, manually with static valves or hydronic, using a dynamic TRV.
A) Unbalanced heating systems are a constant source of frustration for end users and call backs for heating installers. Noisy radiators, uneven heat distribution, excessive heating bills and energy waste are all consequences of inefficient and wasteful systems.
A dynamic solution such as the new Danfoss RAS-B2 functions as both a flow limiter and dynamic pressure valve. It limits flow through the TRV but does this independently of pressure fluctuations, so it is optimised for all days. The valve's built-in differential pressure controller ensures that pressure drops over the valve remain at a constant level, which means flow through the valve is maintained at both full (winter) and partial loads (autumn/spring). Learn how the RAS-B2 works here.
Using lockshield valves or pre-settable TRVs to limit flow is a static form of balancing and probably the most common method but it's not very accurate and takes time. If Static TRVs are fitted the room temperature can be controlled, but flow through the radiators will be
set to allow for full load conditions (winter), resulting in over-delivery and wasted energy during partial load conditions (autumn/spring).
Although not currently mandatory, hydronic balancing is considered best practice. Correct balancing is widely recognised as one of the keys to ensuring a heating system works as per the design specification.
Given the clear comfort and efficiency benefits, and the expectation that forthcoming updates to Part L will include an increased legal requirement to prove that domestic heating systems are well balanced, we advise all installers to embrace balancing as best practice on every installation. And now, thanks to innovations like the RAS-B2 Danfoss Dynamic Valve and Installer App, hydronic balancing doesn't have to be a daunting or time-consuming task.