Earn Money as a Heating Air Conditioning Tasker (Building jobs)

My mother's water heater in Agios Dometios has stopped working properly and needs to be fixed. It isn't producing hot water as it should, and I'm not sure whether the issue is with the heating element, thermostat, or something else. I'd like a qualified technician to come out, diagnose the problem, and carry out the necessary repair. Please let me know what information you need from me before scheduling the visit.

I have a gas boiler in my house and I would like the existing installation to be checked. I want to determine whether it operates correctly and safely, as well as whether any adjustment or maintenance is needed. I have not noticed any specific fault, but I want a general inspection by a specialist. Please suggest to me what should be checked and whether an annual inspection is required.

I need advice on choosing and installing an air conditioner for my apartment. I'm interested in what unit would be suitable for my room size and what installation options are available. I would like to get a quote for a complete installation, including any necessary modifications.

Replace air conditioning pipe insulation (shell) on the rooftop. 10m of 20mm thickness and 10m of 10mm thickness. The aluminized insulation (external reflective), reflective adhesive tape, and cable ties must be supplied. The pipes are on a flat rooftop.