Heat pump installation is a week of building work rather than an appliance swap: a base laid outside, a cylinder placed inside, pipe routes made good, electrical supply upgraded where needed, and a commissioning process that tunes the whole system to the design.
Home Comfort Assured Renewables installs air source heat pumps across Rickmansworth, and this is the honest shape of the week.
Outside first: base, unit, pipe route
The week usually opens outdoors: the base prepared and levelled where the survey placed it, the unit set with its clearances respected, and the insulated flow and return route formed back into the house. Condensate is routed to somewhere that will not ice a path in January.
The visible discipline here is neatness with intent: pipework insulated to specification, penetrations sealed properly, and the unit sitting square where noise and airflow were considered. A tidy outdoor installation is also an efficient one, because the insulation is the efficiency.
- Level base exactly where the survey placed it.
- Insulated pipe route, sealed penetrations.
- Condensate routed away from paths and doors.
Inside: cylinder, plant and making good
Indoors the cylinder goes into its surveyed space with its pipework, expansion and discharge arrangements, and the plant area is built to be serviceable: valves reachable, filters accessible, labels where a future engineer will look.
Making good travels with the work: boxing where routes cross living space, floors reinstated, and the cupboard left as a plant space rather than a scene. This is where a heating firm that also builds tidy plant rooms earns its fee.
- Cylinder set with proper expansion and discharge.
- Valves and filters left genuinely serviceable.
- Routes boxed and floors reinstated as part of the job.
Emitters and electrics
The survey's emitter list gets executed mid-week: the radiators flagged for upsizing swapped, any underfloor circuits integrated, and the system balanced for the lower flow temperatures it will now run. Rooms that passed the audit are simply left alone.
Electrical work runs alongside: the supply and protection the unit requires, controls wired, and the certification issued for the new circuits. Home Comfort Assured Renewables sequences electrics so the commissioning day never waits on a cable.
Commissioning and the handover that matters
Commissioning is where the install becomes a system: the system filled, cleaned and dosed, flow temperature set to the design, weather compensation curve configured, hot water and sanitation cycles programmed, and performance verified under real operation rather than assumed.
The handover is the household's turn: how the controls actually work, why steady running beats boiler-style bursts, what the hot water schedule does, where the isolation and filling points are, and when the first service falls. A heat pump owner who understands their controls gets the efficiency the design promised; one who does not fights the machine all winter.
Related pages
Questions customers ask
How long does a heat pump installation take?
Plan for a week of building work in a typical home: outdoor base and unit, cylinder and plant, emitter changes, electrical supply, then commissioning. Bigger emitter lists and awkward routes extend it.
Will we be without heating or hot water during installation?
There are interruptions while the changeover happens, planned and announced rather than open-ended. The schedule is agreed before the week starts so the household can plan around the gaps.
What happens at commissioning?
The system is filled, cleaned and dosed, flow temperature set to the design, compensation and hot water programmed, and performance verified in operation. The readings belong on your paperwork.
Base, cylinder, emitters, electrics, commissioning, handover: six stages in one week, and the last two decide whether the first four ever perform.
Home Comfort Assured Renewables installs across Rickmansworth to that sequence. The contact page books the survey that precedes it.
