"The ceiling of that room is very high."

Translation: La plafono de tiu ĉambro estas tre alta.

[djzeus01]

Should "altega" be equivalent here, or does it have a specialized meaning?

[MrMorley3]

"altega" would be fine here. Report it as an alternative answer.

[arbaro]

I'd say it works. :)

[aniruddha.19]

Mi ne memoris 'plafono'n.uzis 'malplanko 'n. Ne estis korekta!

[IvanDavidson]

Why is it Tiu and not Tio? Is it because it is specified which room it is?

[Renardo_11]

"Tio" is a pronoun and can replace but never accompany a noun:

• Tio estas kuirejo = that is a kitchen.
• Tiu cxambro estas kuirejo = that room is a kitchen.

English uses the same word for the two neanings, Esperanto doesn't.