Even as the chilly British weather eases, commercial heating systems continue to work hard. For facilities where hot water, heating and boiler services are essential to daily operations, it’s important to that a building’s heating systems remain efficient and reliable.
Commercial premises such as leisure centres, tourist attractions, sports stadiums, housing associations, schools, public sector offices and hotels all rely on continuous performance, regardless of the season.
Yet this is a time of year when energy use can be unpredictable, controls that were initially set months ago may no longer reflect actual building usage or outdoor conditions.
A boiler efficiency audit provides an opportunity to measure system performance, identify hidden issues and adjust controls to match current operating conditions. It enables businesses to optimise their heating systems, prepare for changes in seasonal demand, and benefit from energy savings over the coming months.
Understanding efficiency loss
Boiler efficiency can decline over time due to combustion quality, control settings, water quality, system balance and distribution. Controls adjusted months ago, such as the start of winter, may no longer reflect actual building usage or outdoor conditions.
Leaving systems on winter settings or overrides for the warmer spring and summer months can add to a building’s energy bill and carbon footprint. Systems that operate harder and longer than necessary increase fuel consumption, raise costs, and add carbon emissions – and even if a building appears comfortable, underlying inefficiencies may exist.
Facilities with variable occupancy, multiple heating zones, dated equipment or older plant controls are particularly vulnerable, and without regular audits these issues can remain unnoticed until they begin to affect operational performance.
What an efficiency audit involves
System audits typically begins with a planned service visit to the equipment within the plant room. Our experienced engineers check burners, heat exchangers, pumps, valves, sensors, thermostats and safety systems and ensure they’re recalibrated where needed.
Reviewing control setpoints and schedules is a key part of the process. Buildings evolve over time, and areas that were previously in regular use may now have reduced occupancy. Adjusting schedules and setpoints to reflect actual conditions prevents boilers from working harder than necessary, reducing wear and energy consumption.
Our Engineering Managers can provide additional support, advising on equipment which is nearing end of life, identifying options for retrofitting or replacement, and highlighting opportunities to improve a building’s operational efficiency.
The benefits of tuning
Our service engineers are able to analyse the combustion efficiency of boilers and commission them to their optimum levels to ensure efficient and clean operation.
Once system inefficiencies are identified, further adjustments and improvements can be made to improve performance. For example, fully utilising control systems to apply compensation and optimisation settings, improving water quality, upgrading dated inefficient items of equipment.
Controls can also be fine-tuned to respond more accurately to internal demand and outdoor conditions, rather than operating on outdated assumptions. These changes lower energy costs, reduce fuel consumption and extend the life of boiler components by minimising unnecessary cycling.
For building and facilities managers working towards sustainability targets such as becoming Net Zero, maximising the efficiency of existing systems directly contributes to meeting efficiency and carbon reduction goals.
Planning ahead for Spring
Scheduling boiler audits in March or April ensures that heating and hot water systems are operating efficiently as buildings transition to different conditions and usage needs. It also provides insight into how systems have performed during colder months, highlighting any corrective measures required before the quieter periods of spring and summer.
Data gathered during these assessments can inform decisions on upgrades, refurbishment, or planned capital investment at a later time – and in many cases, efficiency improvements identified during an audit deliver cost savings within a single season.
Last but not least, a boiler efficiency audit is an important part of planned preventative maintenance (PPM), enabling any problems to be quickly identified before they become a bigger issue.
If you wish to better understand your boiler’s current performance and get expert advice on any potential issues, get in touch with Lord Combustion Services on 0121 544 4191 or service@lordcombustion.co.uk



