Load & DesignCâu 9 / 110
Oversizing a residential air conditioner most commonly leads to which problem?
a.Higher heating capacity
b.Short cycling and poor humidity control
c.Lower refrigerant pressures
d.Reduced supply air temperature
Giải thích
An oversized unit cools the air quickly and satisfies the thermostat before it runs long enough to remove moisture, causing short cycling. The result is a cool but clammy space and increased wear from frequent starts. Correct sizing from Manual J and S avoids this.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Using the sensible heat formula, how much sensible heat is removed when 1,200 CFM of air is cooled through a 20 degree F temperature drop?
- What does ACCA Manual D provide guidance for?
- After a Manual J load is calculated, which ACCA procedure is used to select the specific equipment model?
- Which factor increases a building's cooling load the most on a hot afternoon?
- In California, plans for new HVAC systems typically must demonstrate compliance with which energy standard?
- Under the California Mechanical Code, when is a permit generally required for HVAC work?
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