Assertion: balanced ventilation system | /r/HasProperty | expensive to install
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Balanced ventilation systems are appropriate for all climates; however, because they require two duct and fan systems, they are usually more expensive to install and operate than supply or exhaust systems.
text: Because they require two duct and fan systems, however, balanced ventilation systems are usually more expensive to install and operate than supply or exhaust systems.