加州今年新的code规定新房已经不让装gas waterheater

[Nobody]

按2022年州法更新的所有建筑code，规定new construction都不能再用gas waterheater，需要用插电的heat pump tank water heater. 以前那种挂墙的tankless water heater也禁了。只有和老房子attached的construction才能用老的Gas water heater。

[qiuewex]

gas water heater 不是更环保吗

[Nobody]

加州这些左臂没事干天天出一些领先全球的保护气候的法案，在他们眼里，电是最清洁的，再过几年，连车都只让卖电的了。

[BCQ1]

确实很过分，GAS WATER HEATER得罪谁了
为什么不禁GAS DRYER呢，很诡异

[srx]

加州一半的电是用natural gas发出来的，然后再用来给热水器加热？？？这帮人脑子进水了

加州这些左臂没事干天天出一些领先全球的保护气候的法案，在他们眼里，电是最清洁的，再过几年，连车都只让卖电的了。

[test2020]

确实很过分，GAS WATER HEATER得罪谁了
为什么不禁GAS DRYER呢，很诡异

因为左左们脑袋不灵光，不知道有的dryer是燃气的。就看见灶台上燃烧的火苗了

[Nobody]

确实很过分，GAS WATER HEATER得罪谁了
为什么不禁GAS DRYER呢，很诡异

那个也差不多了，看每个city自己制定的法案，有的city比州法还牛比，连灶都已经只让用电了。

[leonhd]

按2022年州法更新的所有建筑code，规定new construction都不能再用gas waterheater，需要用插电的heat pump tank water heater. 以前那种挂墙的tankless water heater也禁了。只有和老房子attached的construction才能用老的Gas water heater。

天然气热水器效率很高的，最高的超过100%，虽然比不上热泵，但胜在方便

[BCQ1]

那个也差不多了，看每个city自己制定的法案，有的city比州法还牛比，连灶都已经只让用电了。

我在研究上一套OFF GRID的SOLAR SYSTEM，以后全用电，不跟他们玩了

[cng]

我在研究上一套OFF GRID的SOLAR SYSTEM，以后全用电，不跟他们玩了

研究成了给哥们传传经验也装一套。就是炒菜不好办了。

[tfusion]

尼玛瞎搞

旧锅炉能不能换新的gas的？

家里那个很老了。没坏。是不是趁早换个新的？

[BCQ1]

尼玛瞎搞

旧锅炉能不能换新的gas的？

家里那个很老了。没坏。是不是趁早换个新的？

只针对NEW CONSTRUCTION

[BCQ1]

研究成了给哥们传传经验也装一套。就是炒菜不好办了。

肯定是上万的，如果打算长期住下来的话，才划算

[cng]

肯定是上万的，如果打算长期住下来的话，才划算

現在這棟以已經住了二十多年了，就沒打算賣。

[iMaJia]

我村今天停電，7小時了，還沒修复。還好家裡是氣灶爐氣熱水，不然沒法吃飯洗澡。

[bsmile]

加州这些左臂没事干天天出一些领先全球的保护气候的法案，在他们眼里，电是最清洁的，再过几年，连车都只让卖电的了。

保护的这点气候在俄乌战争中被全吞噬了，里边各种炸药燃烧爆炸和人体火化生产的各种温室气体够得着全球气候保护100年的努力了。

[kuku]

按2022年州法更新的所有建筑code，规定new construction都不能再用gas waterheater，需要用插电的heat pump tank water heater. 以前那种挂墙的tankless water heater也禁了。只有和老房子attached的construction才能用老的Gas water heater。

2030年才禁止新房安装
楼主先把事实搞清楚再喷不迟

[Nobody]

2030年才禁止新房安装
楼主先把事实搞清楚再喷不迟

你看过2022年的California Energy code？真想学习，我把code页码给你。
section 150.0(n)1 of the 2022 Building Energy Efficiency Standards.
第336页：
8. Domestic water-heating systems. Water-heating systems shall meet the requirements of A, B, C, or shall meet the
performance compliance requirements of Section 150.1(b)1. For recirculation distribution systems, only demand
recirculation systems with manual on/off control as specified in the Reference Appendix RA4.4.9 shall be used:
A. A single 240 volt heat pump water heater (HPWH). The storage tank shall be located in the garage or
conditioned space. In addition, meet the following:
i. A compact hot water distribution system as specified in the Reference Appendix RA4.4.6 in climate zone 1
and 16; and
ii. A drain water heat recovery system that is field verified as specified in the Reference Appendix RA3.6.9 in
climate zone 16.
B. A single 240 volt HPWH that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or
higher. In addition, for Climate Zone 16, a drain water heat recovery system that is field verified as specified in
the Reference Appendix RA3.6.9 and the storage tank shall be located in the garage or conditioned space.
C. A solar water-heating system with electric backup meeting the installation criteria specified in Reference
Residential Appendix RA4 and with a minimum annual solar savings fraction of 0.7.
Exception 1 to Section 150.1(c)8: For climate zones 3, 4, 13 and 14, a gas or propane instantaneous water heater
with an input of 200,000 Btu per hour or less and no storage tank may be installed.
NOTE: The space conditioning system shall be a heat pump as specified in Section 150.1(c)6.

最后的Exception就是留给和主屋attached的new construction用的，但是也需要留出安装a heat pump的空间和电气预留条件。

[fantasist]

我在研究上一套OFF GRID的SOLAR SYSTEM，以后全用电，不跟他们玩了

最常见的方案是tesla solar + power wall吧，一套可能要10万+，装不起。

[kuku]

你看过2022年的California Energy code？真想学习，我把code页码给你。
section 150.0(n)1 of the 2022 Building Energy Efficiency Standards.
第336页：
8. Domestic water-heating systems. Water-heating systems shall meet the requirements of A, B, C, or shall meet the
performance compliance requirements of Section 150.1(b)1. For recirculation distribution systems, only demand
recirculation systems with manual on/off control as specified in the Reference Appendix RA4.4.9 shall be used:
A. A single 240 volt heat pump water heater (HPWH). The storage tank shall be located in the garage or
conditioned space. In addition, meet the following:
i. A compact hot water distribution system as specified in the Reference Appendix RA4.4.6 in climate zone 1
and 16; and
ii. A drain water heat recovery system that is field verified as specified in the Reference Appendix RA3.6.9 in
climate zone 16.
B. A single 240 volt HPWH that meets the requirements of NEEA Advanced Water Heater Specification Tier 3 or
higher. In addition, for Climate Zone 16, a drain water heat recovery system that is field verified as specified in
the Reference Appendix RA3.6.9 and the storage tank shall be located in the garage or conditioned space.
C. A solar water-heating system with electric backup meeting the installation criteria specified in Reference
Residential Appendix RA4 and with a minimum annual solar savings fraction of 0.7.
Exception 1 to Section 150.1(c)8: For climate zones 3, 4, 13 and 14, a gas or propane instantaneous water heater
with an input of 200,000 Btu per hour or less and no storage tank may be installed.
NOTE: The space conditioning system shall be a heat pump as specified in Section 150.1(c)6.

最后的Exception就是留给和主屋attached的new construction用的，但是也需要留出安装a heat pump的空间和电气预留条件。

美国的法律浩如烟海，怎么可能看过整部规范。
但是2022年的新规范有什么改动，大致是知道的
你提供具体材料，我就顺便学习下。
结论是，你查错规范了，你给的是Section 150.1
而Section 150.0才是你应该看得
没兴趣看的人，我就科普一下，这段关于热水器的章节，概括起来就一句话，热水器安装要为将来的电气化预留空间。

Subchapter 7 Single-Family Residential Buildings—Mandatory Features and Devices
Section 150.0 Mandatory Features and Devices
Single-family residential buildings shall comply with the applicable requirements of Sections 150(a) through 150.0(v).
NOTE: The requirements of Sections 150.0(a) through 150.0(r) apply to newly constructed buildings. Sections 150.2(a) and 150.2(b) specify which requirements of Sections 150.0(a) through 150.0(r) also apply to additions or alterations.

(n) Water heating system.

1. Systems using gas or propane water heaters to serve individual dwelling units shall designate a space at least 2.5 feet by 2.5 feet wide and 7 feet tall suitable for the future installation of a heat pump water heater (HPWH) by meeting either A or B below. All electrical components shall be installed in accordance with the California Electrical Code:
A. If the designated space is within 3 feet from the water heater, then this space shall include the following:
i. A dedicated 125 volt, 20 amp electrical receptacle that is connected to the electric panel with a 120/240 volt 3 conductor, 10 AWG copper branch circuit, within 3 feet from the water heater and accessible to the water heater with no obstructions; and
ii. Both ends of the unused conductor shall be labeled with the word "spare" and be electrically isolated; and
iii. A reserved single pole circuit breaker space in the electrical panel adjacent to the circuit breaker for the branch circuit in A above and labeled with the words "Future 240V Use"; and
iv. A condensate drain that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance.
B. If the designated space is more than 3 feet from the water heater, then this space shall include the following:
i. A dedicated 240 volt branch circuit shall be installed within 3 feet from the designated space. The branch circuit shall be rated at 30 amps minimum. The blank cover shall be identified as "240V ready"; and
ii. The main electrical service panel shall have a reserved space to allow for the installation of a double pole circuit breaker for a future HPWH installation. The reserved space shall be permanently marked as "For Future 240V use"; and
iii. Either a dedicated cold water supply, or the cold water supply shall pass through the designated HPWH location just before reaching the gas or propane water heater; and
iv. The hot water supply pipe coming out of the gas or propane water heater shall be routed first through the designated HPWH location before serving any fixtures; and
v. The hot and cold water piping at the designated HPWH location shall be exposed and readily accessible for future installation of an HPWH; and
vi. A condensate drain that is no more than 2 inches higher than the base of the installed water heater, and allows natural draining without pump assistance.
2. Water heating recirculation loops serving multiple dwelling units shall meet the requirements of Section 110.3(c)4.
3. Solar water-heating systems and collectors shall be certified and rated by the Solar Rating and Certification Corporation (SRCC), the International Association of Plumbing and Mechanical Officials, Research and Testing (IAPMO R&T), or by a listing agency that is approved by the executive director.
4. Instantaneous water heaters with an input rating greater than 6.8 kBTU/hr (2kW) shall meet the requirements of Section 110.3(c)6.