# Tankless Hot Water Heater --- Options discussion **URL:** \ **Category:** NYSpeed Off Topic\ **Created:** [October 21, 2010, 11:47am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762 "2010-10-21T11:47:37Z")\ **Posts on this page:** 9\ **Page:** 3
**Author:** ![Fry](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fry/32/7284_2.png) [@Fry](https://forums.speedlife.net/u/Fry)\ **Post date:** [April 12, 2011, 6:37am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/41 "2011-04-12T06:37:23Z")
> [@LAFENGAS](#): > > series Thank you. I was going to choke the next person to call it serial. Good setup. Much better than trying to make a tank/tankless combo work. That would have required a cold water primary feed to the tankless and a hot water secondary from the HWT to the tankless, plus a proportional controller on the hot water feed maintaining a minimum mixed feed water temp. Not the kind of thing you want to roll yourself when you’re going to be renting the place soon. ---------- Post added at 09:37 AM ---------- Previous post was at 09:35 AM ---------- > [@LAFENGAS](#): > > I’m trying to research…“why”…but otherwise that would be the MUCH easier solution. I’m pretty sure it’s because the waste gas is really effing hot and needs double walled vent tubing. When I looked it was going to be about $500 just for materials to vent a single unit. ---
**Author:** ![jimmyfloyd](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jimmyfloyd/32/3077_2.png) [@jimmyfloyd](https://forums.speedlife.net/u/jimmyfloyd)\ **Post date:** [April 12, 2011, 6:43am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/42 "2011-04-12T06:43:30Z")
One of my friends swears by the Rinnai Tankless units. He is a plumber, and just installed one in his house 3 years ago and every time I mention needing to replace my water heater, he tells me to look into those. So you are now doing two of those and getting rid of the 50 gallon one? ---
**Author:** ![LAFENGAS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lafengas/32/7573_2.png) [@LAFENGAS](https://forums.speedlife.net/u/LAFENGAS)\ **Post date:** [April 12, 2011, 7:06am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/43 "2011-04-12T07:06:49Z")
It’s kinda tough to think about sinking money into doing this update…when i already have my place rented out for 3yrs. I’ll only be able to enjoy it for 2 months. > [@Fry](#): > > Thank you. I was going to choke the next person to call it serial. people do that? > [@Fry](#): > > I’m pretty sure it’s because the waste gas is really effing hot and needs double walled vent tubing. When I looked it was going to be about $500 just for materials to vent a single unit. Hmmm…i’m 100% sure mine is single wall, however it goes straight up through the house with a 1-2" air gap and encased in 2"x10" planks. Wonder if their are exceptions…? > [@jimmyfloyd](#): > > One of my friends swears by the Rinnai Tankless units. He is a plumber, and just installed one in his house 3 years ago and every time I mention needing to replace my water heater, he tells me to look into those. > > So you are now doing two of those and getting rid of the 50 gallon one? Yeah, Rinnai is a good brand. And yeah, no need to hang onto the 50gallon tank. ---
**Author:** ![Fry](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fry/32/7284_2.png) [@Fry](https://forums.speedlife.net/u/Fry)\ **Post date:** [April 12, 2011, 7:18am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/44 "2011-04-12T07:18:44Z")
> [@LAFENGAS](#): > > Hmmm…i’m 100% sure mine is single wall, however it goes straight up through the house with a 1-2" air gap and encased in 2"x10" planks. Wonder if their are exceptions…? I think regular direct vent hot water tanks are OK with single wall but tankless require double wall? ---
**Author:** ![RedGoober4Life](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/redgoober4life/32/7610_2.png) [@RedGoober4Life](https://forums.speedlife.net/u/RedGoober4Life)\ **Post date:** [April 12, 2011, 7:20pm UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/45 "2011-04-12T19:20:11Z")
> [@Fry](#): > > Thank you. I was going to choke the next person to call it serial. Why so serial? ---
**Author:** ![ultradriver10000](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ultradriver10000/32/7397_2.png) [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)\ **Post date:** [April 12, 2011, 7:27pm UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/46 "2011-04-12T19:27:32Z")
Wait so you run these on… ![http://www.britishsupermarketworldwide.com/acatalog/cereal_selection.jpg](http://www.britishsupermarketworldwide.com/acatalog/cereal_selection.jpg) ---
**Author:** ![Nikuk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nikuk/32/7254_2.png) [@Nikuk](https://forums.speedlife.net/u/Nikuk)\ **Post date:** [April 12, 2011, 7:49pm UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/47 "2011-04-12T19:49:21Z")
Wait, so you’ve (rather, the mrs) been taking cold showers for the last six months…? ---
**Author:** ![LAFENGAS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lafengas/32/7573_2.png) [@LAFENGAS](https://forums.speedlife.net/u/LAFENGAS)\ **Post date:** [April 13, 2011, 6:13am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/48 "2011-04-13T06:13:55Z")
no… running a single rain shower head at WOT will last me about 20 mins, which is fine for me. It’s a lot of water, so i typically run with the valve about 50% on to avoid drowning. The wife, however, loves scallding hot showers and it lasts only 10mins for her when running full blast. For me, its about being able to run EVERYTHING in the shower at full blast and letting it last a full sex session, unfortunately for me is longer than 5mins. basically it’s a shower with no water regulation…it has the ability to dump a shit ton of water in a short time. With some restraint, it lasts longer than needed. When there is an overwhelming desire to just drwon in a cascade of water…the time is limited. ---
**Author:** ![Daddie](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/daddie/32/7621_2.png) [@Daddie](https://forums.speedlife.net/u/Daddie)\ **Post date:** [April 13, 2011, 11:13am UTC](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762/49 "2011-04-13T11:13:53Z")
lol @ longer than 5mins. So I tested my shower last night after reading this thread. I’m somewhere around 3.2 Gallons a minute. No wonder everyone loves my shower. [Previous page](https://forums.speedlife.net/t/tankless-hot-water-heater-options-discussion/161762.md?page=2)