A plumber and Consumers Speak Out About the Rennai Tankless Water Heater

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Hi, and welcome to another episode of "What's New in Plumbing." I'm Bob Fishman, and I just had a chat yesterday with Alan Urszuy, the co-owner of A-1 Plumbing of Baltimore, a Baltimore plumbing company and Alan filled me in about a number of up-to-the-minute advances in the matter of tankless water heaters { With Americans becoming more and more energy cognizant, tankless, on demand water heaters are becoming more and more accepted. Not only are they a relief to the pocketbook, but they free up space in the cellar, since the new tiny units can be conveniently affixed to any wall in the house. The appliances heat water to the preferred temperature only when required.

The contrivance heats incoming water speedily, and there is no necessity to store hot water in a bulky tank. |As Americans look for more ways of saving energy, and domestic space as well, homeowners are turning to tankless, (hot water on demand), heaters to provide their domestic hot water needs. Tankless heaters are attached to the wall. They only heat up water on demand, and as a result save lots of cash on the power bill. A number of corporations are selling tankless heaters to the American marketplace. To present some of the heaters exact pluses and minuses, I will reflect on the Rennai tankless heater. I heard about the Rennai during a recent chat with Alan Urszuy. Alan had lost of good things to say for the units, noting their power performance, and superior digital sensory system. The Rennai heater is a high performance heater, which means that 95% of the heat generated by gas incineration is transmitted to the water. The heater, is also a condensation heater, featuring a stainless steel structure that recaptures remaining heat from flue gases to pre-heat incoming ground water, which then circulates to the principal copper heater exchanger.

The Rennai heater is praised as being adequate for most moderate to large size homes The unit in particular can produce up to 8 gallons per minute of water that has been raised 35 degrees above the incoming temperature. The exact amount of usable hot water created depends on the heat of ground water. So on a winter's day, when incoming ground water is colder, it may create less hot water per minute, than it will in the summer. Just for comparison sake, with the increased use of low flow showers the average shower might use as little as .6 to 1.5 gpm of hot water. In addition to its energy saving heat transfer design, the Rennai features a concentric vent pipe which rises from the heater to the roof or alternately the side wall of the house. Water heating vent pipes serve two functions.

They bring air in from the outside for combustion, and they provide an outflow route for the gaseous combustion products. Formerly these functions were served by two separate vent pipes, which meant two separate holes in the roof. With the concentric vent pipe, however, only one roof hole is needed. The hot gases are expelled through a central outflow pipe and the outdoor air is sucked in through the surrounding intake pipe. The double layered pvc pipe also provides increased protection against the possible leak of poisonous carbon monoxide from corroded vent pipes. According to consumer reports, the Rennai does have some negative features. The unit does not produce heat until triggered to turn on by the flow of water. The digital sensor must turns on the heating element when it senses a flow of 6gpm.Unfortunately, some of the new ultra low-flow shower heads restrict water flow to this very level, and reports have circulated about Rennai owners experiencing hot water cut offs during their showers. The same problem has been seen with hot water flow in the dishwasher, and this is not surprising since dishwashers generally require fewer gpms than showers, Consumers also complain about the "cold water sandwich," a complaint made about all the tankless units. This problem occurs when the units are first triggered to heat water for a shower. Users experience a rush of hot water followed by a temporary drop in the water temperature, before the water again heats up. Not the type of sandwich you'll want to enjoy, during your summer fun.

Homeowners are developing ways of adjusting to these problems including removal of the low flow shower nozzle and installation of small point of use hot water tanks. But these methods are expensive and also fraught with difficulties. The Good news is that these minor problems are much like earlier bugs that were worked out of the first low flow toilets.And, it is likely that enterprising manufacturers will see these problems as challenges to find a more perfect tankless water heater. Well that's it folks for another episode of What's New in Plumbing, Have a great day!

Article Source: http://depositarticles.com/

A-1 Plumbing of Baltimore is a Baltimore plumbing company which specializes in plumbing heating . The company also provides Timonium Plumber

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