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Tankless water heating. The inside of a hydraulically operated two-stage tankless heater, heated by single-phase electric power. The copper tank contains heating elements with 7.2 kW maximum power. Tankless water heaters — also called instantaneous, continuous flow, inline, flash, on-demand, or instant-on water heaters — are water heaters ...
403.16 – Client certificate is untrusted or invalid; 403.17 – Client certificate has expired or is not yet valid; 403.18 – Cannot execute request from that application pool; 403.19 – Cannot execute CGIs for the client in this application pool; 403.20 – Passport logon failed; 403.21 – Source access denied; 403.22 – Infinite depth ...
The main disadvantage is their much higher initial costs; a US study in Minnesota reported a 20- to 40-year payback for the tankless water heaters. [citation needed] In a comparison to a less efficient natural gas fired hot water tank, on-demand natural gas will cost 30% more over its useful life. [dubious – discuss] [citation needed]
An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.
An infrared heater or heat lamp is a heating appliance containing a high-temperature emitter that transfers energy to a cooler object through electromagnetic radiation. Depending on the temperature of the emitter, the wavelength of the peak of the infrared radiation ranges from 750 nm to 1 mm. No contact or medium between the emitter and cool ...
The tested SWH system had about 20% of the impact of an electrical water heater and half that of a gas water heater. [ 50 ] Analysing their lower impact retrofit freeze-tolerant solar water heating system, Allen et al. (qv) reported a production CO 2 impact of 337 kg, which is around half the environmental impact reported in the Ardente et al ...
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X.3.XXX Mail System Status. X.4.XXX Network and Routing Status. X.5.XXX Mail Delivery Protocol Status. X.6.XXX Message Content or Media Status. X.7.XXX Security or Policy Status. The meaning of the "detail" field depends on the class and the subject, and are listed in RFC 3463 and RFC 5248. A server capable of replying with an Enhanced Status ...
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