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: 216

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

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored 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.

Latest Activity

Profile IconBenney Dornevil, Mike Norvell Sr and Jen Loomis joined Home Energy Pros
yesterday
Joanie Minor posted a status
"Home Performance Institute now offers OSHA 10 and Confined Space Classes. Call 203-536-2151 to register."
yesterday
Joanie Minor posted a photo
yesterday
John Kaye posted a blog post

FREE Home Efficiency & Safety Assessments in the Los Angeles County area.

Since last June I have been qualifying homeowners in the Los Angeles County for the Home Upgrade…See More
yesterday
Eric Kjelshus replied to Rod Fox's discussion Does calcification affect electric water heater aquastat temperature sensor performance?
"Those 240 Volt aquastats shut off and then on kinda quick back on.  The older the tank the…"
yesterday
Rod Fox replied to Rod Fox's discussion Does calcification affect electric water heater aquastat temperature sensor performance?
"Well I'd love to tell you folks I found an answer, but I did not... I went to my…"
yesterday
Rod Fox replied to Kevin Eigel's discussion What is the best energy auditing software?
"I've been trying to answer this question for many years and have not yet found an answer.…"
yesterday
Jerry Lawrence posted events
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service