COMMUNITY FORUM

valleymach

10:08AM | 01/18/04
Member Since: 01/17/04
1 lifetime posts
Bvplumbing
I am thinking of installing a tankless hot water system in my whole house and would welcome comments form anyone who has one or has installed one. I am in a 100 year old house in MT--> 2 bedroom, 2 bath. Just finishing the installation of 2nd bath on the 2nd floor. Current gas hot water tank is in a crawl space under the house--> works fine. Thanks in advance for your feedback. J

plumber Tom

02:21PM | 01/18/04
Member Since: 05/10/03
801 lifetime posts
I have installed the Bosch brand. They retail around $800.00 + installation cost. They are great space savers and you can mount it on a wall.

erik peterson

05:29AM | 01/19/04
Member Since: 06/23/03
223 lifetime posts
Common complaint is the lack of volume that the units put out...most of these tankless units have a "restrictor" that slows the water down as it passes through the heat exchanger,,,allowing the unit to heat up the water. The larger more commercial models seem to work better...personally I would not install one...but im "old-school". erik

devildog

05:52AM | 01/19/04
Member Since: 09/16/02
250 lifetime posts
As to what Erik said above. The manufacturer lists the volume of water that will be heated. The chart on the box takes into account how many degrees you want to heat it. So if your water comes into your house at 50 degrees and you want it at 120 degrees, you have to heat it 70 degrees. At this rate the manufacturer might say you can heat 2 gallons per minute or at 80 degrees you can heat 1.5 gallons per minute. Don't look at MY numbers I'm just giving examples. I COMPLETELY MADE THOSE NUMBERS UP. If you buy a small unit you won't get enough hot water and it will just be warm water. Buy a large unit and you'll never worry about it.

I always thought these units were supposed to be used where the hot water used to have to travel long distances and now you have almost instant hot water. So if your water has to travel long distances you may want to think about two strategically placed.

Just my thoughts,
Devildog

erik peterson

03:52AM | 01/20/04
Member Since: 06/23/03
223 lifetime posts
numbers aside.....most people are un-amused when they install these units (at greater cost) and find that the volume on the hot side is noticebly less than the cold... and is further affected if additional fixtures in the structure are turned on. we have yanked several of these units out over the past few years for this reason. consider also if the unit fails to operate, one is now waiting for the factory "tech" as opposed to any local plumber or perhaps yourself to repair the conventional unit. erik

plumber Tom

03:47PM | 01/22/04
Member Since: 05/10/03
801 lifetime posts
Apparently Devildog and Eric don't watch too many home time shows. After just 1 year a homeowner compared their yearly energy (gas) bill, to the old conventional water heater. The amount saved was approx. 30% With the ever increasing energy costs, higher AFUE appliances are becoming more popular.

erik peterson

03:14AM | 01/23/04
Member Since: 06/23/03
223 lifetime posts
Apparently some people watch too many "home" shows and dont have practical experience.....Most of these shows are helpful BUT they are also "marketing" venues for whatever company is sponsoring the program...erik

bridges

02:18PM | 02/01/04
Member Since: 01/31/04
2 lifetime posts
Eric,
Please quantify your experience with these tankless systems. I'm considering using one and would appreciate having a parameter to judge your comments by - thanks!
How many units have you installed and of those how many where point of use and how many whole house?
How many have you yanked out and for what reasons?
How many are the homeowners happy with and for what reasons?
How many are disappointed and for what reasons?
Is the "tech" the only one that can work on these without voiding the warranty or can any plumber work on them?

Thanks Eric,
Dan

erik peterson

03:07AM | 02/03/04
Member Since: 06/23/03
223 lifetime posts
Not really interested in writing a dissertation on the tankless units, way too much time. I will say in my opinion these units have value as a "point of use" heater. As for using the units for "whole house" some people are disappointed. We have been involved with these units for about 4 years...have installed many and removed several. Most home-owners would be unable to service one of these units should it fail to operate and perhaps even void the warranty in the attempt. Personally have been in the residential plumbing business for well over 30 years. erik

bridges

11:31AM | 02/03/04
Member Since: 01/31/04
2 lifetime posts
Thanks Eric
Dan
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