Made-to-measure cages for air source heat pumps.
A&A Engineering Systems manufactures and supplies perforated metal cages for air source heat pump outdoor units, made to fit any unit, in powder-coated steel and any RAL colour. They screen an ugly unit with a finish that suits the garden, and keep fingers and objects away from the fan.
Guard the fan and hide the unit
An air source heat pump draws outdoor air across a coil with a large fan. The outdoor unit stands on hard standing at ground level, and on social housing schemes it is often in a tenant's garden, within reach of children and visitors. The guard has to keep people and objects out while leaving the unit free to breathe. A heat pump is also a bulky, industrial-looking box, so the cage doubles as a screen in a finish chosen for the garden.
Fingers and foreign objects
The fan sits at the front of a unit that is low enough for a child to reach. A cage with fine perforations keeps fingers, and anything pushed through, clear of the blades.
Garden knocks and strikes
Balls, lawn mowers, gravel and garden tools can all hit a unit sitting in a garden. A cage takes the knock so the casing, coil and fan do not.
Hides an ugly unit
Outdoor units are bulky and industrial. A cage in a RAL colour matched to the fence, brickwork or window frames makes the unit part of the garden instead of its focal point.
Guarded, with air still moving
Manufacturers advise against boxing a heat pump in. Restricted airflow lets discharged air be drawn back into the unit, which cuts efficiency and wears the fan. Our cages use perforated panels and a vented top, sized to the unit, instead of solid sides.
Access for engineers
A unit that cannot be easily reached cannot be properly maintained, so a cage has to open for servicing without being taken apart.
Daikin advises at least 30 to 50 cm clear at the sides of the unit and 1 m in front of the fan. Many newer units use R290 propane refrigerant, where clearance around the unit also stops refrigerant collecting near ignition sources. Distances vary by make and model, so the manufacturer's installation manual always applies.
Cages sized to the outdoor unit
Every cage is made to order, for a single property or a whole scheme.
Any make, any size
Send us the make and model and we make the cage to fit, from single-fan units to larger twin-fan models.
Finished to order
Powder coated in any RAL colour, to suit the property or match a scheme specification.
One cage or a whole scheme
Tell us how many units and where they are, and we will quote for the lot.
Request a quoteWho we supply
Currently supplying cages to a social housing scheme in the North West. Open to housing providers, installers and private owners.
Housing associations and social landlords
Residents rarely choose the system, and tenants change over the life of a property. A cage guards the fan whoever lives there, across a whole scheme.
Local authorities
Guards for heat pumps installed under council retrofit programmes.
Installers and contractors
Supply a guard with the heat pump so the unit is protected from handover.
Homeowners and commercial sites
Cages for units already installed in gardens, car parks and shared areas.
Request a quote
To price a cage we need: