Wetbacks. And shit (no, not referring to spics)

[Akzle]

okay intellicunts.
Im gona make some water heating shiznik to tie into the passive solar.
My idea is a refractory cement block 500square by 50.
What i want, is ideas or know-what about best piping to use.
Underfloor heating would obviously be good. But couldnt bend/coil tight enough. And i dont want joiners in the slab.
Copper is expensive, and would need to fab adaptors to the 3/4"alkathene system.
Would garden hose handle corrosive cement? Would it handle repeated heating and cooling from fire?
What say you, friendly folk of kb?

[unstuck]

Most common garden hoses would break down I think . Alkathen would be ok would it not, if you had a layer of sand between the pipe and cement.

[unstuck]

Or if you can squeeze a bit more out of your bennie, something like this would be ideal.........http://www.hoseshop.co.nz/newsite/steam-hose :stupid:

[BOGAR]

It is worth finding a site like this. ecobob also do an interesting site and have a lot of great projects or links to them.
http://www.buildyourdream.co.nz/forum/viewtopic.php?p=2539 (http://www.buildyourdream.co.nz/forum/viewtopic.php?p=2539)

[The Reibz]

Your better off with aluminium or copper piping for their excellent heat conducting properties.
Cost you a fuckload but will end up saving you a bit more energy in the long run. They don't rust either, but after many years you might get a copper taste in your water which aint cool

[Akzle]

Your better off with aluminium or copper piping for their excellent heat conducting properties.
Cost you a fuckload but will end up saving you a bit more energy in the long run. They don't rust either, but after many years you might get a copper taste in your water which aint cool

it's going to be for showers and waterboarding the kids, with a kuni stove on top. much cheaper than a fucking califont and doesn't cost the gas to run either.

i had a bad feeling it was as you say.

[328FTW]

Copper, steam rubber tubing is insulated.

Just find your local heatpump installer and rob all the sites he's working on, it's what all the cool kids do.

[Matt Bleck]

You're going to do underfloor heating using ya fire as the heat source? Closed loop? Tempered?

The biggest draw back with underfloor is getting the temp right as it takes a while for any adjustment made to temp to be felt.

Have you considered radiators?

[Grumph]

When i worked for a solar installer we used a 5/8 dia plastic pipe. White and thick wall - polythene ? I don't know.
It would take quite small radius bends - say 100mm radius. Made for the job. Didn't crack or creep. Inert in concrete.
the historical problem with adapting something is that sooner or later it will give trouble.....

And yes, with an uncontrolled heat source, radiators are safer.

[mashman]

Have you considered radiators?

I miss radiators.

[Akzle]

Copper, steam rubber tubing is insulated.

Just find your local heatpump installer and rob all the sites he's working on, it's what all the cool kids do.
contrary to popular belief, i'm not a fucking homo.

You're going to do underfloor heating using ya fire as the heat source? Closed loop? Tempered?

The biggest draw back with underfloor is getting the temp right as it takes a while for any adjustment made to temp to be felt.

Have you considered radiators?
a) no, b) no, c) yes, i was going to rip into an old oil heater, but again, doing the fab on the pipework becomes the bitch.

When i worked for a solar installer we used a 5/8 dia plastic pipe. White and thick wall - polythene ? I don't know.
It would take quite small radius bends - say 100mm radius. Made for the job. Didn't crack or creep. Inert in concrete.
the historical problem with adapting something is that sooner or later it will give trouble.....

And yes, with an uncontrolled heat source, radiators are safer.
polytetrofluroethylene? ptfe? would be highly interested to know what you're talking about, as it sounds lie it'd work.

i control the hell out of my hot sauce.

[The Reibz]

The biggest draw back with underfloor is getting the temp right as it takes a while for any adjustment made to temp to be felt.


I heard it can take up to 2 years for some of those systems to heat up. Any truth in that.
Quite interested in energy conservation when it comes to heat because I live in a 70 year old state house that feels like the doors are open all the time. In the process of trying to seal up everything as best I can

[skippa1]

contrary to popular belief, i'm not a fucking homo.

a) no, b) no, c) yes, i was going to rip into an old oil heater, but again, doing the fab on the pipework becomes the bitch.

polytetrofluroethylene? ptfe? would be highly interested to know what you're talking about, as it sounds lie it'd work.

i control the hell out of my hot sauce.
This might help?
http://www.masterplumbers.org.nz/assets/Uploads/pdfs/Materials-for-hot-water-pipes.pdf

[george formby]

You're going to do underfloor heating using ya fire as the heat source? Closed loop? Tempered?

The biggest draw back with underfloor is getting the temp right as it takes a while for any adjustment made to temp to be felt.

Have you considered radiators?

I'm scratching my head on a similar theme. Trying to heat my derelict old cottage from a wet back. Underfloor was my first thought but the complexity of installation & insulation looked like a battle on a budget. The very clever chap who signed my fire installation off recommended ceramic wall mounted radiators with underfloor conduit. Relatively cheap & not a bastard to install.

Maybe wrapping your concrete rather than having the plumbing running through it could be an option. Once it's warm you will have the same thermal value.

[BOGAR]

I heard it can take up to 2 years for some of those systems to heat up. Any truth in that.
Quite interested in energy conservation when it comes to heat because I live in a 70 year old state house that feels like the doors are open all the time. In the process of trying to seal up everything as best I can

My Family installed underfloor heating and yes it can take at least a year. The reason given was, it takes that time for the concrete to properly dry out. The system is running better now just make sure it is correctly insulated all the way around (under is usually done but the edge was left open, for us). Other wise its a very nice heat.

[Akzle]

My Family installed underfloor heating and yes it can take at least a year. The reason given was, it takes that time for the concrete to properly dry out. The system is running better now just make sure it is correctly insulated all the way around (under is usually done but the edge was left open, for us). Other wise its a very nice heat.

the moral of the story is build in summer. And get local crete without additives.

[Edbear]

http://www.plumbers.co.nz/

And these guys have a specialist underfloor heating team.

http://www.europlumbing.co.nz/

[unstuck]

Make sure your concrete has plenty of lime in it Akzel, otherwise you may find it cracking when the water gets too hot. I did something like what you are wanting for my father in law in his green house for a seedling table and just used 20mm alkathene surrounded in sand and then incased in concrete. Worked ok too, but the heat was not enough I though, but he was happy, so all good.:woohoo:

[scissorhands]

might give you ideas for alternatives

http://en.wikipedia.org/wiki/Kotatsu

A kotatsu (炬燵?) is a low, wooden table frame covered by a futon, or heavy blanket, upon which a table top sits. Underneath is a heat source, often built into the table itself.[1] Kotatsu are used almost exclusively in Japan, although similar devices are used elsewhere.....

In some ways, the concrete pad idea seems flawed. Heat loss into the ground means low efficiency, hence the need to wrap the concrete pad. Also heat will be distributed across the whole pad[unless taps are installed] meaning unused areas are receiving heat when its more required in other areas.

I'm thinking a portable heat sink, that you can unplug from the fire, a wheel around the house, to bedrooms etc, but there are problems with lugging a box of rocks about all the time.

[george formby]

Mentioning a box of rocks immediately made me think Sauna, steam keeps you warm....:blink:

[Akzle]

http://www.plumbers.co.nz/

And these guys have a specialist underfloor heating team.

http://www.europlumbing.co.nz/

once again. You miss the point entirely.

[Akzle]

might give you ideas for alternatives

http://en.wikipedia.org/wiki/Kotatsu

A kotatsu (炬燵?) is a low, wooden table frame covered by a futon, or heavy blanket, upon which a table top sits. Underneath is a heat source, often built into the table itself.[1] Kotatsu are used almost exclusively in Japan, although similar devices are used elsewhere.....

In some ways, the concrete pad idea seems flawed. Heat loss into the ground means low efficiency, hence the need to wrap the concrete pad. Also heat will be distributed across the whole pad[unless taps are installed] meaning unused areas are receiving heat when its more required in other areas.

I'm thinking a portable heat sink, that you can unplug from the fire, a wheel around the house, to bedrooms etc, but there are problems with lugging a box of rocks about all the time.

yeah nah. Theres only 2 rooms, and this is wanted for an alfresco shower.
When i dont want or need the heat, i stop burning shit.
But while youre japponaise, check out hibachi.

[Akzle]

Mentioning a box of rocks immediately made me think Sauna, steam keeps you warm....:blink:

its on my todo list. Altho a few hookers in the caravan of a summer nights eve the effect is the same.