35. Decide whether the following statements are true or false according to the text.

1) Whole-house ventilation systems are usually classified as supply, exhaust and heat-recovery.

2) There are four main types of ventilation systems.

3) Exhaust ventilation systems are relatively low-priced to install.

4) Spot ventilation exhaust fan is the simplest form of an exhaust ventilation system.

5) Exhaust ventilation systems can contribute to higher heating and cooling costs compared with supply ventilation systems.

6) Supply ventilation systems work by depressurizing the building.

7) Supply ventilation systems allow better control of the air than do balanced systems.

8) Supply ventilation systems are most applicable in cold climates.

9) A balanced ventilation system usually has two fans and two duct systems.

10) A heat-recovery unit reduces the heating and cooling costs of ventilation.

36. Answer the following questions.

1) What is the classification of whole-house ventilation systems?

2) Are the mechanical or natural or combined?

3) What is the principle of exhaust ventilation systems working?

4) Why its use may be ineffective?

5) What is the principle of supply ventilation systems working?

6) What do exhaust ventilation systems and supply ventilation systems have in common?

7) What type of ventilation systems is the most expensive to install?

8) What type of ventilation systems can be added to the basic design?

9) A heat-recovery unit reduces maintenance, doesn’t it?

10) Are balanced, heat-recovery ventilation systems energy efficient?

37. Fill in the table using the information from Text b.

Type	Equipment	Climate	Disadvantages
Exhaust ventilation systems
Supply ventilation systems
Balanced ventilation systems
Balanced, Heat-recovery Ventilation Systems

38. Make an oral report on the text.

LANGUAGE FOCUS

39. Match the English and Russian equivalents.

1) exhausted ventilation system	a) вентиляция с рекуперацией тепла
2) supply ventilation system	b) избегать обратной тяги
3) balanced ventilation system	c) предотвращать ухудшение
4) heat-recovery ventilation system	d) вытяжная система вентиляции
5) to avoid back drafting	e) ограждающая конструкция здания
6) a single-point exhaust	f) теплопередающая поверхность
7) building envelope	g) приточная система вентиляции
8) to prevent deterioration	h) изолированные помещения
9) heat exchange surface	i) одноточечное вытягивание
10) discrete locations	j) комбинированная система вентиляции

40. Combine the words from the column on the left with the suitable nouns from the column on the right. Translate them into Russian.

1) building	a) damage
2) pressure	b) ventilation
3) exhaust	c) air
4) moisture	d) openings
5) outdoor	e) shell
6) combustion	f) systems
7) supply	g) leak
8) random	h) difference
9) balanced	i) gases
10) air	j) fan