TANKLESS WATER HEATER

[sophia2005]

请教有谁用过或正在用这种热水器？优点？缺点? 水温？如果两三个人同时洗澡会有问题吗？用电还是用GAS？先谢了！

 

[mianfei]

国内家家户户都用几十年了

 

[john19]

国内热水器功率小，洗澡时水量如同尿量。这里的稍微大一些，但没试过。

 

[sophia2005]

国内热水器功率小，洗澡时水量如同尿量。这里的稍微大一些，但没试过。

看来用的不多。谢谢楼上两位。

 

[eilna]

现在建的新房家家都是ＴＡＮＬＥＳＳ　。

 

[eilna]

十年以后家家都会是ＴＡＮＫＬＥＳＳ。再没有大的水炉了。

 

[lindamy]

builder 介绍说Tankless多人同时洗澡，不会受影响。
from wiki:

Tankless advantages
Tankless water heaters provide many advantages:


Mobile water heater in a train car (Russia)

• Long term energy savings: Though a tankless water heater typically costs more initially, it usually costs less to operate because of lower energy use—since it only heats water when required instead of continuously maintaining a tank of heated water. Even homes or buildings with high demand for hot water may realize some level of savings. If instant hot water at taps at limited hours is a priority, a recirculation system can be accommodated by using an aquastat and timer to decrease the added heat loss from the recirculation system. If the storage tank of an electric heater is highly insulated, so that the outer surface of the tank is only slightly warmer than the ambient air, the savings with a tankless heater is less.
• Unlimited hot water: Though flow rate determines the amount of hot water the heater can produce, it can deliver it at that flow rate indefinitely. However, this can also be an ecological disadvantage, as running out of hot water limits use, but a tankless heater provides no such limit.
• Less physical space: Most tankless water heaters can be mounted on a wall or internally in a building's structure. This means less physical space must be dedicated to heating water. Even systems that can't be mounted on walls take up less space than a tank-type water heater.
• Reduced risk of water damage: No stored water means there is no risk of water damage from a tank failure or rupture, though pipe or fitting failure remains possible.[10]
• Temperature compensation A temperature compensating valve tends to eliminate the issue where the temperature and pressure from tankless heaters decrease during continuous use. Most new generation tankless water heaters stabilize water pressure and temperature by a bypass valve and a mixing valve incorporated in the unit. Modern tankless are not inversely proportional, because they regulate the amount of water they heat and discharge, and therefore stabilize water temperature by using a flow control valve. Temperature change, not flow speed, is the issue the water heater must address. The wider the temperature rise, the less flow from the unit—the smaller the temperature rise, the greater the flow. The flow control valve, in conjunction with thermistors, maintains a stable temperature throughout the use of the unit.
• Safety Tankless Water Heaters precisely control water temperature, which means dangerous temperature levels and spikes are less likely.[11]

 

[老烟]

电的不研究，据说功率要求过大，成本高
优点：无限热水，占地少，理论上省气
缺点：热水来之前需要放掉的凉水明显比tank的要多，安装贵

 

[john19]

Tankless water heaters are efficient but not necessarily economical
http://www.consumerreports.org/cro/...eaters/overview/tankless-water-heaters-ov.htm

 

[就是爱喝开水]

电的不研究，据说功率要求过大，成本高
优点：无限热水，占地少，理论上省气
缺点：热水来之前需要放掉的凉水明显比tank的要多，安装贵

这个不明显

还有一个优点是水比有缸的新鲜一些

 

[uglyducking]

这个不明显

还有一个优点是水比有缸的新鲜一些

可以直接喝吗？这样就省了买一个hot water dispenser了。

 

[就是爱喝开水]

可以直接喝吗？这样就省了买一个hot water dispenser了。

你告诉我你是鸭还是猫先

 

[uglyducking]

你告诉我你是鸭还是猫先

就是爱喝开水

 

[Anakin]

你告诉我你是鸭还是猫先

猫鸭

 

[就是爱喝开水]

就是爱喝开水

脸红什么鸭？哦，估计全身都得红，毛也褪得差不多了吧！？
喜欢被红烧还是被BBQ？