Actual statement of events
★★★★★
CGR has completed his works in a very efficient and pleasant way.
Home / Air conditioning / What Happens on Installation Day
What Happens on Installation Day
Arrival, protecting your home, core drilling, pipework, vacuum testing, commissioning and handover. What actually happens when air conditioning goes in.
Before the day
You will know who is coming and roughly when. Clear access to the wall where the indoor unit goes and to the outside position, and if there is anything fragile nearby, move it or tell us and we will.
1. Arrival and protection
Floors and furniture covered before anything comes out of the van. We agree the exact position of the indoor unit with you and mark it, and confirm where the outdoor unit is going, before we drill anything.
2. The indoor unit
The mounting plate is fixed and levelled properly. A unit that is not level will drip, because the condensate tray relies on gravity.
3. Core drilling
One neat core through the wall for the pipework and drain, angled very slightly downwards so water always runs out rather than in. Dust is contained at the point of drilling rather than swept up afterwards, and the hole is sleeved and sealed on both sides.
4. The outdoor unit
Mounted on brackets or a plinth, level, with clearance around it for airflow, and with anti-vibration mounts so it does not transmit noise into the building.
5. Pipework and drainage
Refrigerant lines run and fully insulated — uninsulated pipe sweats and drips. The condensate drain is set with a continuous fall along its whole length. Externally, pipework goes in trunking, straight and level.
6. Vacuum and leak test
The part you cannot see and the part that matters most. The system is pulled down to a deep vacuum and held there, which proves it is airtight and pulls out moisture. Moisture left in a refrigerant circuit forms acid and destroys the compressor over time.
If the vacuum does not hold, there is a leak and we find it before charging. Skipping or rushing this is the single most common reason a system fails early.
7. Charging and commissioning
Refrigerant charged to the manufacturer's weight. Running pressures and temperatures checked and recorded, in both cooling and heating modes.
8. Handover
We show you how the controls work — properly, not by handing you a remote. F-Gas records completed, warranty registered with the manufacturer on your behalf, and the room left as we found it.
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Every review here is a verified Checkatrade review, left after a real job. Many were written under our previous name, CGR Plumbing & Heating — same engineers, same standards, new name.
9.67/10
★★★★★
Checkatradefrom 266 reviews
Waste piping replacement
★★★★★
CGR were rectifying the waste piping for under our kitchen sink, and also removing the waste for our previous water softener. Very happy with their knowledge, quality of work, customer service and wouldn't hesitate to recommend their services. Also a huge bonus to have a 30 day guarantee on the works provided.
Toilet fixing
★★★★★
He is a polite and knowledgeable tradesman. He communicates clearly and executes the job as planned and agreed.
Replaced a hot water expansion vessel
★★★★★
I have a great experience dealing with CGR. From the start he was very professional and efficient. Even when he ran into a complication with the combination valves, he resolved the issue without complaint and to an excellent standard. Thank you CGR.
Fixing shower pressure
★★★★★
My shower pressure suddenly fell very low. I called CGR and they came to fix the problem. Not even a day later and my shower was fixed. Thank you for your quick and very professional service.
Fixed the bathroom basin tap
★★★★★
We always call them as they are reliable and honest.
Replaced pump and 3 way valve
★★★★★
Great team. Quick job. Impossible to complain and happy to recommend.
Boiler service
★★★★★
CGR Heating serviced my gas boiler and magna clean system. They were punctual and completed the work to a high standard. I would recommend them.
Boiler service
★★★★★
Very reliable and punctual. He's very tidy and gets on with his work quietly.
Emergency water leak in kitchen
★★★★★
We had an emergency water leak. CGR was able to attend very quickly and help to isolate and stop the leak. It was near the stopcock and underneath some kitchen drawers so it required some cutting of wood to access and took a few hours, but he worked hard to fix it and then cleaned up thoroughly afterwards.
Boiler and radiator fault repair
★★★★★
I had a boiler fault that was actually caused by an airlock in my central heating. Chaudray identified the potential issue quickly and clearly communicated the steps required to fix it. He carried out the work then and there, and the problem was solved. He was very courteous and tidy, too.
Gas safety certificate
★★★★★
CGR carried out gas safety review and boiler service at one of our rental properties. Arrived on time and explained all the checks they did. Thank you.
Replaced electric shower
★★★★★
CGR were very quick to respond and replaced the electric shower in one of our rented properties.
Cap gas pipe
★★★★★
Perfect, thanks.
Water main repair and gas pipe cap
★★★★★
Great communication before, and turned up early and friendly. Perfect job completed in time. Thanks.
Removing radiators
★★★★★
Quality of work, clarity and tidiness was excellent. Chaudray was clear about all the steps of work, fixed some historical issues as part of solving the job to the best standard, but checked, explained and gave options as he went.
Excellent service
★★★★★
Chaudhry messaged me promptly and was able to come the next day. He was really friendly and carried out the work quickly and to a high standard.
Boiler fixed
★★★★★
Very professional and competent.
Questions
How long will you be in my home?
A single room is usually one day, arriving morning and finished by late afternoon. Multi-room systems are two to three days.
How much mess will there be?
One core hole per indoor unit, drilled with dust contained and made good both sides. Floors and furniture covered throughout.
Do I need to be there the whole time?
No, but we do need you at the start to agree positions and at the end for handover.
Can you run the pipework out of sight?
Wherever the building allows. Where it has to run externally it goes in trunking on the least visible elevation.
Book a free survey
No obligation, no pressure. We will tell you honestly what your space needs and what it will cost.