What do you guys think of these [URL="http://www.amazon.com/gp/product/B009EDGTXG/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B009EDGTXG&linkCode=as2&tag=ecorenovorg-20"]low cost water heaters[/URL]?

The Good: At $225 they are even cheaper than a tank water heater!! Can use standard B vent, no expensive SS venting required. Works with 1/2" gas lines. Igniter runs off batteries, no electrical hookup required. Simple design, no electronic controls or inducer motors. Doesn't look like it needs a drain connection.

The Bad: Users complain poor temp regulation and questionable support after the sale. Efficiency isn't rated as high as more expensive models.

Views: 402

Reply to This

Replies to This Discussion

No edit option on original post, here is the correct link:

I've personally installed several of these. Yes, they're good units, and they work according to advertising when installed correctly. The problem is that some homeowners install it themselves and then complain that they don't work. But the "they" is the person not the heater, lol.

Anyway, Bob, to correct you, they cannot use B vent in many jurisdictions in N. America. That's because, like most gas or LP tankless water heaters, the exhaust contains corrosive condensate. After a few years of use with B vent, a hole will probably form, causing a noxious fume health hazard. Use Class III stainless steel, unless you want to redo the venting every 5 years or so.

The best installation guide I found for the 10L is on this page: https://gadgetsgo.com/Marey-10L-natural-gas-or-propane-indoor-water... . Scroll down to where it says Venting Guide.

You do need a drain connection for longer venting runs, but not for short ones.

Regarding support, sometimes I need to call the manufacturer Marey and never had a problem getting through. Try it yourself at 855-627-3955. It's their toll free number.

Why is B vent OK for standard tank water heaters but not the Marey? 80% and natural draft furnaces have been using b vent for decades, vent normally lasts 20+ years if installed correctly. The cost of The Cat III venting is more than the water heater. A condensing model @ $900 that uses ordinary PVC pipe starts making more sense.

Several tankless manufacturers have switched to allow for CPVC and PVC, for sure an easier and cheaper material.

Why is B vent OK for standard tank water heaters but not the Marey? 

Which ones? I don't know of any. That's because all tankless heaters produce condensate, and it's corrosive.

Anyway, many/most tankless manufacturers (Eccotemp, Rheem, Paloma, Rinnai) also require the Class III SS on many of their current models. It's not just Marey.

RSS

Featured Forum Discussions

Too many BTU's. Too much horsepower?

Started by Steve in General Forum. Last reply by Eric Kjelshus 8 minutes ago. 4 Replies

Stack/wind pressure and flow networks.

Started by Daniel James Grundy in Training. Last reply by Daniel James Grundy yesterday. 5 Replies

BDT with vermiculite in hollow CMU walls?

Started by Brad Cook in General Forum. Last reply by John Nicholas yesterday. 2 Replies

Strange IR Image

Started by Larry Nissman in General Forum. Last reply by Brad Cook Mar 9. 7 Replies

Videos

  • Add Videos
  • View All

Latest Activity

Eric Kjelshus replied to Steve's discussion Too many BTU's. Too much horsepower?
"Its more about run time with high RH removing, than to large over sized AC unit, in houses.  …"
8 minutes ago
Sarah OConnell posted a blog post

Crowdsourcing for Innovation

Share Your Ideas!Novel Building Envelope Design for Increased Thermal PerformanceIn 2014, more than…See More
13 hours ago
Colin de Paor is now a member of Home Energy Pros
15 hours ago
Walter Ahlgrim replied to Steve's discussion Too many BTU's. Too much horsepower?
"The 5 ton system you have is not 500 hp racecar engines they are 500 hp truck engines. The duct…"
yesterday
Daniel James Grundy replied to Daniel James Grundy's discussion Stack/wind pressure and flow networks.
"So I wanted to start with a basic who can help then go into more detail later. But yes find…"
yesterday
Daniel James Grundy replied to Daniel James Grundy's discussion Stack/wind pressure and flow networks.
"My tutor got back to me and while areas don't quite feel right a little to much assumptions…"
yesterday
Brennan Less replied to Daniel James Grundy's discussion Stack/wind pressure and flow networks.
"Daniel, I'm assuming you're trying to predict the airflows through the different openings…"
yesterday
Martin Newmark joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
yesterday

Home Energy Pros

Welcome to Home Energy Pros – the unique digital community by and for those who work in the home energy performance arena.

Home Energy Pros was founded by the developers of Home Energy Saver Pro (supported by the U.S. Department of Energy) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network. Please honor our Guidelines

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service