Poor comfort, rising consumption and recurring faults can have different causes. Establishing the symptoms helps focus the investigation.

Facilities managers contribute:

• Temperature complaints and affected rooms or zones.
• Fault history, repair expenditure and downtime.
• Occupancy hours and changes in building use.
• Available energy data and maintenance records.
• Details of temporary heaters, overrides and other workarounds.

Watsons assesses:

Plant operation, controls, heat distribution and available performance data to distinguish equipment faults from capacity, scheduling or system issues. Together, the team agrees measurable objectives, such as more consistent temperatures, reduced consumption or fewer service interruptions.

Shared outcome: A defined problem and an agreed basis for assessing improvement.

Watsons assesses the heat source, pumps, pipework, valves, emitters and controls as an integrated system. Facilities managers help establish the operational consequences of retaining or replacing equipment.

Facilities managers provide current operating requirements and confirmed plans for the building. Watsons uses this information to establish the technical design basis.

The assessment considers:

• Building and zone heat losses at winter design conditions.
• Ventilation heating loads.
• Occupancy schedules and warm-up requirements.
• Domestic hot water demand and recovery duty.
• Confirmed future loads.
• Capacity required during maintenance or plant failure.

Replacement equipment should not be sized solely from the existing boiler rating. Peak duty, annual demand and part-load operation all influence selection. Where fabric improvements are planned, their effect on heat demand and operating temperatures should be incorporated.

Shared outcome: An agreed design duty that reflects how the building operates and its foreseeable requirements.

Watsons assesses suitable heating technologies against building demand, existing infrastructure and operating requirements. Facilities managers help weigh the options against budgets, estate plans, maintenance arrangements and operational priorities. Each option is assessed for capacity, efficiency, distribution, controls, resilience and installation requirements.

Boiler-based systems

Gas, oil or electric boiler systems may serve existing radiators, fan convectors and air-handling coils through a hot water distribution network. The assessment considers plant sizing, modulation, sequencing, operating temperatures, fuel or electrical supply, and distribution condition. Flues, combustion ventilation and condensate drainage are reviewed where applicable.

Heat pump systems

Air-source or ground-source heat pumps require assessment of source availability, operating temperatures, emitter output and seasonal performance. Watsons checks hydraulic requirements, electrical capacity, plant space, noise and hot water provision, identifying which existing components can be retained or require modification.

Warm-air heating

Direct-fired or indirect-fired warm-air systems may suit warehouses, workshops and other large spaces. Selection considers heat distribution, mounting positions, air movement, temperature stratification and losses through frequently opened doors. Fuel supply, flues and ventilation requirements are assessed according to the equipment type.

Radiant heating

Radiant systems may suit high-ceilinged buildings or defined work areas where heating the entire air volume is unnecessary. The assessment considers occupancy patterns, mounting height, coverage, obstructions and clearances from stored materials. Gas-fired and electric options have different supply, installation and operating-cost implications.

Electric resistance heating

Panel heaters, convectors and other local electric heaters may suit small, intermittently occupied areas or locations where extending central distribution is impractical. Watsons assesses electrical capacity, controls and expected operating hours. Low installation complexity must be weighed against forecast running costs.

Hybrid and mixed systems

Different technologies may serve different zones or work together to meet base and peak loads. Watsons defines heat-source priority, changeover conditions, controls integration and backup capacity. Facilities managers help establish whether the arrangement remains practical to operate and maintain.

Shared outcome: A shortlist of suitable systems, with clear comparisons of technical requirements, whole-life costs and operational implications.

Watsons provides the technical scope and performance assumptions. Facilities managers contribute tariffs, budget parameters, disruption costs and the organisation’s investment criteria.

Options should be compared over a common assessment period, including:

• Design, equipment and installation.
• Electrical, hydraulic and building enabling works.
• Controls integration, commissioning and metering.
• Forecast energy consumption and maintenance.
• Temporary services and operational disruption.
• Carbon performance and future conversion requirements.

Running-cost estimates should use site-specific tariffs and seasonal system performance, including auxiliary consumption and supplementary heating. Sensitivity checks show how changes in tariffs, occupancy or performance affect the result. Funding can be assessed separately until eligibility and availability are confirmed.

Shared outcome: A recommendation supported by transparent costs, assumptions and operational benefits.

Facilities managers define access arrangements, critical services and acceptable shutdown periods. Watsons develops the installation sequence, temporary-service requirements and commissioning plan around those constraints. For phased works, the plan establishes how retained and new equipment will interact throughout the programme.

Handover should include:

• Commissioning and hydraulic balancing records.
• Functional testing of sequencing, interlocks, alarms and specified backup operation.
• Controls descriptions, setpoints and schedules.
• Updated drawings and maintenance information.
• Operator training and access to performance data.

A review during the first heating season allows actual operation to be checked against the agreed objectives. Facilities managers report comfort and reliability issues; Watsons reviews system performance and identifies any necessary adjustments.

Shared outcome: A commissioned system, informed operators and evidence that the improvement meets the building’s needs.