ᐅ Experiences with Split Air Conditioning in Older Homes – What Should Be Considered?

Hello everyone,
we live in an older building (built in 1960, insulation is average) and are considering whether installing a split air conditioning system is worth it—especially for the hot summer days.
It is important for us to have a quiet indoor and outdoor unit, good efficiency (preferably A++ or better), and of course a solution that doesn’t require major construction work.
We already had an initial consultation with a local provider, who recommended the Mitsubishi Electric MSZ-HR35VF—does anyone know this model?
Are there people here with experience in retrofit installations in existing buildings? What should definitely be considered (e.g., condensate drainage, wall penetrations, noise for neighbors, etc.)?
Looking forward to any tips—pictures and specific recommendations are also welcome.
Best regards

If you want to upgrade an older building, the MSZ-HR35VF is actually quite suitable in terms of efficiency and noise level – it is fairly quiet and has an A++ rating, which is acceptable. When installing, you should carefully plan the routes for electrical wiring, refrigerant lines, and condensate drainage together with a professional company to avoid unpleasant surprises when making wall penetrations. Especially the condensate must be safely drained outside to prevent moisture problems.

Outdoor unit: Sound isolation is essential to prevent neighbors from being disturbed by vibrations or humming. The shorter the distance between the indoor and outdoor units, the more efficient and trouble-free the operation will be. Proper installation is crucial; it is better not to cut costs by choosing the cheapest provider. By the way: In some regions, installation requires a building permit / planning permission, so check the local building regulations beforehand.