Breakdown of Теплообменник заменили, с тем чтобы избежать промерзания и затопления.
Questions & Answers about Теплообменник заменили, с тем чтобы избежать промерзания и затопления.
This is a very common Russian pattern: 3rd person plural with no stated subject.
So Теплообменник заменили literally looks like They replaced the heat exchanger, but in real usage it often means:
- The heat exchanger was replaced
- Someone replaced the heat exchanger
- They replaced the heat exchanger in the vague English sense where they means unspecified people
Russian often uses this structure where English would prefer a passive.
Both are possible, but they feel a bit different.
- Теплообменник заменили = neutral, natural, action-focused, common in reports and technical writing
- Теплообменник был заменён = more explicitly passive, sometimes a bit heavier or more formal
Russian often prefers an active-looking sentence with an omitted agent instead of a passive construction. So this sentence is very idiomatic.