1.Sizing an HVAC unit: key factor?
1.确定 HVAC 设备尺寸的关键因素是？
2.Unit for heat energy (raising 1lb water by 1°F)?
2.热量单位（将 1 磅水加热 1° F 所需能量）是？
3.When switching from a storage-type to a tankless water heater what typically needs to be changed?
3.将储水式热水器更换为即热式热水器时，通常需要更换哪一项？
4.What is the required service platform size for attic HVAC equipment?
4.阁楼暖通设备的服务平台尺寸要求是多少？
5.Garage water heater minimum height from floor?
5.车库中热水器距地面的最小高度是？
6.Independent thermostatic control for multiple rooms?
6.多房间独立恒温控制是？
7.What is the typical R-value for insulation in a 2×4 wall cavity?
7.2×4 墙体腔体常见的保温 R 值是多少？
8.Easiest insulation for an old home?
8.老房最易安装的保温材料是？
9.When provide water heater warranty to homeowners?
9.何时向房主提供热水器保修？
10.What venting is required for a gas water heater installed in a closed closet?
10.封闭壁橱内安装燃气热水器时，需要怎样设置通风口？
