--- title: Patterson-Kelley Solutions Blog | Indirect Water Heating description: Indirect Water Heating | Patterson-Kelley Blog - insights, opinions and news relating to the world of hot water heating solutions --- [![](https://info.pattersonkelley.com/hs-fs/hubfs/SPX%20-%20PK%20Logo%20Long.png?width=2124&height=225&name=SPX%20-%20PK%20Logo%20Long.png)](http://www.pattersonkelley.com) - [Solutions Blog](https://info.harscopk.com/blog) # Patterson-Kelley Solutions Blog ## [P-K COMPACT® Semi-Instantaneous Indirect Water Heater](https://info.pattersonkelley.com/blog/p-k-compact-semi-instantaneous-indirect-water-heater) \[fa icon="calendar'\] Jun 20, 2025, 11:00:00 AM / by [Patterson-Kelley](https://info.pattersonkelley.com/blog/author/patterson-kelley) posted in [Water Heaters](https://info.pattersonkelley.com/blog/topic/water-heaters), [Indirect Water Heating](https://info.pattersonkelley.com/blog/topic/indirect-water-heating), [PK-COMPACT](https://info.pattersonkelley.com/blog/topic/pk-compact), [replacement parts](https://info.pattersonkelley.com/blog/topic/replacement-parts), [spare parts](https://info.pattersonkelley.com/blog/topic/spare-parts) [\[fa icon="comment"\] 0 Comments](https://info.pattersonkelley.com/blog/p-k-compact-semi-instantaneous-indirect-water-heater#comments-listing)   [Read More \[fa icon="long-arrow-right"\]](https://info.pattersonkelley.com/blog/p-k-compact-semi-instantaneous-indirect-water-heater) ## [Why Choose Indirect Domestic Water Heating?](https://info.pattersonkelley.com/blog/why-choose-indirect-domestic-water-heating) \[fa icon="calendar'\] Sep 20, 2018, 1:37:45 PM / by [Patterson-Kelley](https://info.pattersonkelley.com/blog/author/patterson-kelley) posted in [Condensing Boilers](https://info.pattersonkelley.com/blog/topic/condensing-boilers), [Water Quality](https://info.pattersonkelley.com/blog/topic/water-quality), [Water Heaters](https://info.pattersonkelley.com/blog/topic/water-heaters), [Indirect Water Heating](https://info.pattersonkelley.com/blog/topic/indirect-water-heating) [\[fa icon="comment"\] 1 Comment](https://info.pattersonkelley.com/blog/why-choose-indirect-domestic-water-heating#comments-listing) ### Examining Direct Fired Water Heaters ### ![Water running from a tap into a kitchen sink](https://info.pattersonkelley.com/hs-fs/hubfs/Stock%20images/Water%20running%20from%20a%20tap%20into%20a%20kitchen%20sink.jpeg?width=279&name=Water%20running%20from%20a%20tap%20into%20a%20kitchen%20sink.jpeg) It comes as no surprise that technological advances in the water heating industry have allowed manufacturers to develop highly efficient commercial boilers that provide well rounded heating comfort. Utilizing commercial boiler platforms to produce both building heat and domestic hot water has become a trend in the industry, but what does this  mean for the commercial units?  [Read More \[fa icon="long-arrow-right"\]](https://info.pattersonkelley.com/blog/why-choose-indirect-domestic-water-heating) [All posts](https://info.pattersonkelley.com/blog/all) ### Subscribe to Email Updates - Recent - Popular - Categories ### Lists by Topic - [Condensing Boilers (18)](https://info.pattersonkelley.com/blog/topic/condensing-boilers) - [Boiler (13)](https://info.pattersonkelley.com/blog/topic/boiler) - [Hydronic Boilers (13)](https://info.pattersonkelley.com/blog/topic/hydronic-boilers) - [commercial boilers (10)](https://info.pattersonkelley.com/blog/topic/commercial-boilers) - [Non-Condensing Boilers (9)](https://info.pattersonkelley.com/blog/topic/non-condensing-boilers) - [Condensing (8)](https://info.pattersonkelley.com/blog/topic/condensing) - [Water Heaters (6)](https://info.pattersonkelley.com/blog/topic/water-heaters) - 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