Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > Dockside Chat
Reload this Page >

outdoor tankless hot water heater

Notices

outdoor tankless hot water heater

Old 01-15-2010, 04:47 AM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
bellsisland's Avatar
 
Join Date: Nov 2001
Location: Charleston, SC
Posts: 5,917
Default outdoor tankless hot water heater

I am thinking about ordering this one
http://www.nextag.com/RHEEM-Natural-...63/prices-html

I live on the river that has some salt content, do you think this would corrode faster?

seems like a good price and should run 2 showers at 5.3gpm?
bellsisland is offline  
Old 01-15-2010, 05:29 AM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Nov 2007
Location: Hobe Sound, Fl
Posts: 4,251
Default

I think the low salt content should be fine. The heat exchanger is under warranty for 10 years anyways.

Now, here are my thoughts on the external model. The heaters gpm capacity is stated as a raise in water temp. In other words starting at 70 deg it can sustain 105 deg water at 5.3 gpm (not exact stats but close I am sure). This is fine in Florida when the water entering the heater is at least 70 all the time.

Do you use the lake house in the winter or is it summertime use only?

I think the water heater outside is a great idea just needs to be thought through carefully because of the systems capacity. Have you looked at the larger capacity units?
Mersiles is offline  
Old 01-15-2010, 05:47 AM
  #3  
Senior MemberCaptains Club Member
Thread Starter
 
bellsisland's Avatar
 
Join Date: Nov 2001
Location: Charleston, SC
Posts: 5,917
Default

Mersiles, great point, the gpm level is based on water gain. And We are here in the winter, which lately would have affected our gpm.

Back to the drawing board.
bellsisland is offline  
Old 01-15-2010, 05:52 AM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Nov 2007
Location: Hobe Sound, Fl
Posts: 4,251
Default

Originally Posted by bellsisland View Post
Mersiles, great point, the gpm level is based on water gain. And We are here in the winter, which lately would have affected our gpm.

Back to the drawing board.
Why dont you measure the temp of the water coming in to get a baseline? Just run the water from the tap at the entry point to the house and stick a thermometer in there for a few minutes. They have charts describing the gain. You might be OK with the 5.3 or you might want to look at the larger unit.
Mersiles is offline  
Old 01-15-2010, 06:42 AM
  #5  
Senior Member
 
Join Date: Sep 2008
Location: Lafayette, La.
Posts: 3,919
Default

I don't know what kind of adjustments are on that unit. Mine has a temp and flow adjustments. I use it for a bathroom with a shower, two sinks, and a washer. Usually there is only one person in there at a time so gpm hasn't been a problem. I have however run the shower and opened both sink faucets wode open and let them run for a few minutes. I didn't let it go for 10 minutes but for a few it kept up fine with no real pressure drop. By cutting back on the flow adjustment the water stayes in the unit longer and gets hotter without turning up the heat knob. I'm sure if I turned them both up all the way it would keep up with demand just fine. Mine is a Bosch 1600H.
Also, I think the temp of the water coming into the house is lower than 70 degrees at any time of the year because the pipes are burried.
Mike
beenie is offline  
Old 01-15-2010, 07:38 AM
  #6  
Senior MemberCaptains Club Member
 
Join Date: Nov 2003
Location: San Diego
Posts: 4,683
Default

I looked at that unit, I ended up with the Takagi (spl?) They are rated for outside. My install was kind of protected by an eve, but I live about 3 minutes from the beach. It has held up very well. I dont think your 5.3 is gonna be enough unless you are using low flow shower heads.

http://www.tanklesswaterheaters.com/takagitk2.html

Thats the unit I used, and it ran a 3 BR 2 Bath 3600 sq foot house with a dishwasher with no real issues.
doughnut is offline  
Old 01-15-2010, 08:03 AM
  #7  
Senior MemberCaptains Club Member
Thread Starter
 
bellsisland's Avatar
 
Join Date: Nov 2001
Location: Charleston, SC
Posts: 5,917
Default

Originally Posted by doughnut View Post
I looked at that unit, I ended up with the Takagi (spl?) They are rated for outside. My install was kind of protected by an eve, but I live about 3 minutes from the beach. It has held up very well. I dont think your 5.3 is gonna be enough unless you are using low flow shower heads.

http://www.tanklesswaterheaters.com/takagitk2.html

Thats the unit I used, and it ran a 3 BR 2 Bath 3600 sq foot house with a dishwasher with no real issues.
It really depends on your rise in temp on the water. If the water is 80deg then a 5.3 would be perfect for 2 showers at a time. But if you have a big rise and a long way to the shower, then it might be border line.

I need to do a little more thinking and measuring to see what makes sense.
Hell I should just buy a tank for $350 and be done with it.
bellsisland is offline  
Old 01-15-2010, 08:30 AM
  #8  
Senior MemberCaptains Club Member
 
Join Date: Nov 2007
Location: Hobe Sound, Fl
Posts: 4,251
Default

This is the unit that I have except it is LP rather than NG. I got mine from Home Depot. I see on HD site that they are offering 40% off but there are "No items to view".

Keep in mind I am in FL so it doesnt have to work as hard but I have seen two showers going and the laundry at the same time. There was only a slight change in the water flow on mine.

http://www.lakecountypipe.com/Produc..._PTG74PVN.aspx
Mersiles is offline  
Old 01-15-2010, 08:40 AM
  #9  
Senior MemberCaptains Club Member
 
Join Date: Nov 2003
Location: San Diego
Posts: 4,683
Default

I forgot to metion I did a recirc deal on the farthest away Bathroom.
doughnut is offline  
Old 01-16-2010, 07:07 PM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Nov 2006
Location: New Smyrna Beach
Posts: 8,181
Default

I have had two Noritz tankless heaters for 4 years and they are fantastic. Mine are NG. Wouldn't ever have a regular water heater anymore.
C Skip R is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread