HEATING, VENTILATION & SERVICES 31
THE EFFICIENCY CHECKLIST
When specifying heating systems, housebuilders need to take a variety of considerations into account to ensure that they can produce maximum efficiency returns from developments. Bill Jones of Potterton advises on best practice.
he integration of an appropriate heating system into a new build is vital in order to maximise the level of heat output and efficiency for the homeowner. Equipment selection and system design are the first steps to achieving a high performance, efficient heating system.
T As well as achieving an appropriate SAP
rating, the heating and hot water systems need to perform well in the real world. It is important to take advice from SAP assessors and technical parties, or work with a manufacturer that does so, in order to meet carbon and/or energy targets. Reviewing and adjusting heating and plumbing design plans, as necessary, is vital in ensuring that the final system is the most suitable for the property.
BOILER
A high quality, efficient boiler can make a massive difference to a property’s SAP rating. SAP ratings are key when choosing a boiler, as is the flow rate, size, weight, and ease of installation. A system compact enough to fit in a standard kitchen cupboard for example, will give installers more flexibility when siting the boiler, making it a perfect solution for those living in multigenerational homes where space is precious. Also, a larger output boiler can allow the system to be used in homes with more than one bathroom.
PLACEMENT
Although most housebuilders usually have an idea of where the boiler or cylinder needs to be sited, this can change depending on whether the placement of these systems will be detrimental to the heating or plumbing design.
The usual location for boilers is in the kitchen or the utility room, and for cylinders it is normally airing cupboards. However, recently, as homeowners increas- ingly want more space, many builders have been moving boilers out of the
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kitchen and into garages, airing cupboards, lofts and WCs.
RADIATORS
Radiators should ideally be placed beneath window sills, as cold air entering the room
is heated by the convective air. If radiators are placed away from windows then cold air is drawn across the room to the radiators, creating a draft.
The size of the room needs to be considered when allocating wall space for radiators. The heating reach is usually 2.5 metres from the radiator, and therefore if seating areas are situated outside of this range, cold spots may be experienced by the occupants.
FLUE
The flue position is critical, as boundary lines must be followed while still being aware of window openings and nuisance from plumbing. Installers should consult the boiler manual for guidance on position- ing the flue to maintain the minimum clearances and prevent any issues arising in the future.
ROOM THERMOSTATS
As well as selecting the correct thermostat for the system, the location of the thermo- stat has a major effect on comfort levels and
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