i*********o
发帖数: 772 | 1 这个房子有三层，2700尺，有十几个房间，百年老房子了，不知道装个中央空调需要多
少米米？ |
j***k
发帖数: 2719 | 2 not worth it.. just get mini-split heat pump from Daikin, Mitsubishi, or
Fujitsu. It is more afforadable and lot more effcient.
【在 i*********o 的大作中提到】
: 这个房子有三层，2700尺，有十几个房间，百年老房子了，不知道装个中央空调需要多
: 少米米？
|
j***b
发帖数: 5901 | 3 如果是北方，那并不适合用heat pump。
【在 j***k 的大作中提到】
: not worth it.. just get mini-split heat pump from Daikin, Mitsubishi, or
: Fujitsu. It is more afforadable and lot more effcient.
|
z*****a
发帖数: 3809 | 4 We just added central AC to a similar house. Our cost was ~$18000.
【在 i*********o 的大作中提到】
: 这个房子有三层，2700尺，有十几个房间，百年老房子了，不知道装个中央空调需要多
: 少米米？
|
C*******d
发帖数: 15836 | 5 严重同意！
【在 j***k 的大作中提到】
: not worth it.. just get mini-split heat pump from Daikin, Mitsubishi, or
: Fujitsu. It is more afforadable and lot more effcient.
|
z*****a
发帖数: 3809 | 6 Which one is more affordable depends on the house. For us, it was actually
slightly cheaper to get central AC than mini-split systems for 8 rooms.
【在 j***k 的大作中提到】
: not worth it.. just get mini-split heat pump from Daikin, Mitsubishi, or
: Fujitsu. It is more afforadable and lot more effcient.
|
C*******d
发帖数: 15836 | 7 This can be true, but:
1. You have much better efficiency.
2. You have much better control (turn on/off or set different temperatures
at different rooms).
actually
【在 z*****a 的大作中提到】
: Which one is more affordable depends on the house. For us, it was actually
: slightly cheaper to get central AC than mini-split systems for 8 rooms.
|
j***k
发帖数: 2719 | 8 the price including instllation maybe slightly cheaper with central AC for 8
rooms. But in terms operating cost in the long term. mini-splits would be
cheaper. Though you have 8 rooms, I doubt all 8 would be used at the same
time. especially at night. If only 3 rooms are used, min-dsplit allows you
to only turn on only those, saving you energy bills. furthermore, with
central AC, almost 30% of the energy is wasted while travelling thru
ductworks..
in addition, retro-fitting older houses with new duct works could be tricky
and very much dependnet on the the skill of the designers and installers.
Ducts would have to travel thru closets and other area that are not ideal
for the airflow. With the limitiation of the exisiting structure,
implentmenting the ideal airflow is almost impossible. this would leave
uneven cooling/heating where certain rooms would be colder/hotter than the
others. individual temeprature control is also impossible. When my in-laws
comes to stay with us, i know they would prefer warmer night temperature in
their room than my wife and i for sure...
actually
【在 z*****a 的大作中提到】
: Which one is more affordable depends on the house. For us, it was actually
: slightly cheaper to get central AC than mini-split systems for 8 rooms.
|
j***k
发帖数: 2719 | 9 heat-pump heating would be supplemental tot he exisiting heating. If LZ is
in the north with an older house, the house must already has heating. After
new heat pump is installed. LZ could turn the temperature of the exsting
system down to 58 (instead of the normal 68), and just use heat pump in the
rooms you want to bring it the temperature to the desired level. energy
saving is significant.
【在 j***b 的大作中提到】
: 如果是北方，那并不适合用heat pump。
|
i*********o
发帖数: 772 | 10 谢谢你们的回复。我们在中部，房子已经有radiater加热片，是不是就不要装中央空调
了？
我们也在想着，能用就用吧，省点钱买好点的家具。。。用窗机是不是也可以？只是房
子很高，而且每个房间都比较大。。。
After
the
【在 j***k 的大作中提到】
: heat-pump heating would be supplemental tot he exisiting heating. If LZ is
: in the north with an older house, the house must already has heating. After
: new heat pump is installed. LZ could turn the temperature of the exsting
: system down to 58 (instead of the normal 68), and just use heat pump in the
: rooms you want to bring it the temperature to the desired level. energy
: saving is significant.
|
|
|
i*********o
发帖数: 772 | 11 你们是在那个州啊？我们在中部。我看着空调本身并不贵，是不是人工很贵？
谢谢
【在 z*****a 的大作中提到】
: We just added central AC to a similar house. Our cost was ~$18000.
|
C*******d
发帖数: 15836 | 12 如果你的屋子没有中央空调的管道，那么加全屋的管道将是一笔大花费，而且可能会影
响房屋布局。而
用分体式空调不会有这个问题。而$18000基本上都够装15-18个分体空调室内机了。
【在 i*********o 的大作中提到】
: 你们是在那个州啊？我们在中部。我看着空调本身并不贵，是不是人工很贵？
: 谢谢
|
j***b
发帖数: 5901 | 13 这样的效果可能不会很好。heat pump的效率取决于温差。只要你住的屋子温度是70度左右，外面冷的时候heat pump效率就会非常差，几乎就是电热取暖了。所以我觉得如果暖气不是烧电的，那就不用买heat pump了，买mini split空调要便宜一些。如果暖气是烧电的，那买heat pump倒是能让取暖省写电。
其实是用heat pump把全局温度加热到58度，然后自己住的屋子再用space heater把温度加高才效率才更高一些。
After
the
【在 j***k 的大作中提到】
: heat-pump heating would be supplemental tot he exisiting heating. If LZ is
: in the north with an older house, the house must already has heating. After
: new heat pump is installed. LZ could turn the temperature of the exsting
: system down to 58 (instead of the normal 68), and just use heat pump in the
: rooms you want to bring it the temperature to the desired level. energy
: saving is significant.
|
z*****a
发帖数: 3809 | 14 You should get some proposals and quotes from HVAC contractors before you
decide what to do.
We originally planned to get mini-split systems but changed our mind after
talking to a few HVAC contractors. It turned out that for our nearly 100-
year old house, it was very easy to add ducts for central AC because there
were plenty of unused space in the attic, basement, and behind walls for
ducts to run. The entire central AC installation took two days and we were
able to have AC vents in all 12 rooms in the house instead of only the 8
rooms that were planned for mini-split systems.
The biggest problems with window or thru-the-wall ACs are the high noise
level, poor insulation, and ugly appearance. Both mini-split and central
ACs would be big improvements in these areas.
【在 i*********o 的大作中提到】
: 谢谢你们的回复。我们在中部，房子已经有radiater加热片，是不是就不要装中央空调
: 了？
: 我们也在想着，能用就用吧，省点钱买好点的家具。。。用窗机是不是也可以？只是房
: 子很高，而且每个房间都比较大。。。
:
: After
: the
|
z*****a
发帖数: 3809 | 15 We're in NYC, where labor is probably more expensive than anywhere else in
the US.
For central AC, the main cost is the labor for the duct installation, which
greatly depends on the architecture of the house.
For mini-split ACs, the labor costs for installation are much lower but the
equipment costs can be much higher if you have a lot of rooms since each
room need a separate evaporator/blower unit.
【在 i*********o 的大作中提到】
: 你们是在那个州啊？我们在中部。我看着空调本身并不贵，是不是人工很贵？
: 谢谢
|
