Search: Posts Made By: jbaron
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Replies: 29
Views: 6,681
Posted By jbaron

As I said earlier, I do not think that it's...

As I said earlier, I do not think that it's appropriate to speculate on "how much money is to be saved" without doing any sort of analysis. You can't make a guess based on "$8 versus 20 cents" if...
Replies: 29
Views: 6,681
Posted By jbaron

The difference in plate thickness does not...

The difference in plate thickness does not account for all, or even most, of the difference in efficiency. The efficiency difference is a result of the grip of the aluminum plate on the PEX tube,...
Replies: 29
Views: 6,681
Posted By jbaron

This sounds like a fine DIY project, but it...

This sounds like a fine DIY project, but it should be noted that there are two sorts of aluminum plates - the thinner, stamped ones and the thicker, extruded ones. I used the thicker plates with my...
Replies: 37
Views: 2,020
Posted By jbaron

Hi Mark, Having been through the heat loss...

Hi Mark,

Having been through the heat loss numbers on my house, yes, 20 BTU/sq. ft. sounds reasonable for this area.

What do I think of my Contender? What's there to think about? It works, it...
Replies: 37
Views: 2,020
Posted By jbaron

Mark, If you'd like to see a Tekmar system in...

Mark,
If you'd like to see a Tekmar system in action - with a HT Products boiler in my case - I'm in Monterey and would be glad to show you around. It's a sophisticated system that I installed...
Replies: 37
Views: 2,020
Posted By jbaron

Is your entire house one zone, with only one...

Is your entire house one zone, with only one thermostat? If so, you might be able to get away with a mod-con boiler piped directly, without a system loop or a system pump, which would (in turn) save...
Replies: 37
Views: 2,020
Posted By jbaron

Before you run off and purchase a new boiler, do...

Before you run off and purchase a new boiler, do you know why the Takagi corroded? I lived on one of those old Eichlers for a year (in Santa Clara, back in 1994) and I have heard stories about the...
Replies: 4
Views: 1,252
Posted By jbaron

You connect the Wile Eco to the 335 "Zone Group...

You connect the Wile Eco to the 335 "Zone Group Pump A" output. The 420's "Primary Circulator" output is for the boiler pump, the one that you have wired to the boiler.

Jeff
Replies: 16
Views: 1,645
Posted By jbaron

Well, something "like" that, but not "that". The...

Well, something "like" that, but not "that". The spec sheet says "not for potable water."
Replies: 8
Views: 1,524
Posted By jbaron

One piece of advice: You should install a boiler...

One piece of advice: You should install a boiler that can be serviced locally in your area. It won't be fun if you install a boiler and then you (or the next home owner, for that matter) find that...
Replies: 7
Views: 6,025
Posted By jbaron

My recommendation would be that you acquire...

My recommendation would be that you acquire pieces of 1/2", 5/8", and 3/4" Pex and see which one you can work with by yourself. If you can't lay the Pex down, it won't matter that you have a lower...
Replies: 24
Views: 4,782
Posted By jbaron

rbeck, You are talking in circles. Delta T and...

rbeck,
You are talking in circles. Delta T and Delta P are not the same thing, and they are not equivalent ways of handling changing heat distribution.
Jeff
Replies: 24
Views: 4,782
Posted By jbaron

Pressure and Delta T are not the same thing. ...

Pressure and Delta T are not the same thing. Pressure and gpm are the same thing, as one drives the other. When we talk about maintaining constant pressure, or altering pressure, we are not talking...
Replies: 5
Views: 1,228
Posted By jbaron

Rather than cutting the cord off of the Alpha,...

Rather than cutting the cord off of the Alpha, which is (IMO) a bad idea, a better solution might be to wire an electrical box into the control (using romex or a conduit) and then plug the Alpha into...
Replies: 9
Views: 7,582
Posted By jbaron

OK - My mistake. Got it. A reasonable...

OK - My mistake. Got it.

A reasonable boiler (and I'm sure that the TT is one such animal) will allow you to set an outdoor reset curve for the supply water temperature. For your system, you'd...
Replies: 9
Views: 7,582
Posted By jbaron

I think that the chances that you'll need 180...

I think that the chances that you'll need 180 degree water in the upstairs is about zero, regardless of where you are in the Bay Area! The maximum temperature that you should ever run through...
Replies: 9
Views: 2,833
Posted By jbaron

If (and only if) you have a one zone system, why...

If (and only if) you have a one zone system, why do you even need P/S piping, or the Alpha? The end result, regardless of how you pipe the system, is governed by thermodynamics: The boiler puts out...
Replies: 41
Views: 2,928
Posted By jbaron

If you look at the manual for your boiler, about...

If you look at the manual for your boiler, about 2/3 of the way down, you will see that you can look at the temperatures from the sensors attached to the various water lines. What are they?

My...
Replies: 2
Views: 1,120
Posted By jbaron

Thanks a bunch, xiphias. Jeff

Thanks a bunch, xiphias.

Jeff
Replies: 2
Views: 1,120
Posted By jbaron

Buffer Tank Recommendations

Greetings!

I'm looking for recommendations for a small-ish buffer tank for a closed residential radiant heating system. I *think* that I'd prefer stainless steel, but I'm not wedded to that. I...
Replies: 25
Views: 1,311
Posted By jbaron

If you are sizing to a heat loss that does not...

If you are sizing to a heat loss that does not include the heat loss through the slab into the ground, and if the slab is insulated, then you might as well be throwing darts at a dart board. You...
Replies: 14
Views: 9,523
Posted By jbaron

You can find all sortf of electronic relays...

You can find all sortf of electronic relays online at Graingers - see Time Delay Relays - Relays - Electrical - Grainger Industrial Supply...
Replies: 10
Views: 1,511
Posted By jbaron

You can't run pipes up and down the walls, as you...

You can't run pipes up and down the walls, as you won't be able to be rid of the air. You have to run the pipes horizontally - you'll need to build a wall/panel assembly that fits over your wall...
Replies: 18
Views: 5,433
Posted By jbaron

Equating "less effective at heating the space"...

Equating "less effective at heating the space" and "extracting less heat from the water" is not correct. Consider 100 degree water that maintains a floor at 75 degrees. It is that 25 degree...
Replies: 18
Views: 5,433
Posted By jbaron

I'm not sure what the problem is, if any. ...

I'm not sure what the problem is, if any.

As the speed of the circulating water (with a fixed supply temperature) goes up by a factor of 2, the delta-T (which measures the amount of heat lost...
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