forums energies: society, ecology and clean technologies

Hello

The assembly of my central heating is progressing.

I look at the different supplier of head + thermostatic body
to put on radiators.

For the same function I am impressed by the price difference.
What could explain such a difference?

Made in China?

I have always been touted the Danfoss brand but what about the others (COMAP, SOMATHERM, RBM, GIACOMINI, ORKLI, THERMADOR, HEIMMER, DEVILLE THERMIQUE, ...).

If it is cheaper is this forcing the m ...?

it's like everything: kind 16A low-end amp circuit breaker at 4 euro and much more expensive in legrand or other big brand

the one who has a lot of money can take the big brand, but for me the quality is really not proportional to the price

in troubleshooting all kinds of things I often find in big brands more complicated and more difficult to repair

the low-end are often easier to dismantle ... and in the case of fittings more easily interchangeable: the big brands tend to invent new dimensions to corner customers ... the low-end use the old dimensions most common

if for the same price we have ordinary taps of the big brand or low-end thermostats I prefer the 2nd!

I think it's a little more complicated !!!

Because in the low-end / cheap, there can be things that have very very short lifetimes ...

After using low-end equipment, I tend to buy the brand very very occasionally (German, Swiss ... if you follow my look; it is sometimes also done in CVhine, but with a design and quality control that makes all the difference).

Another example: for 50 years, I used low-end shoes and wore pairs and pairs ... And for my birthday, at 60, I thought I could afford the ixe a pair of this brand which bears the name of the dibale, made in France, 2 and a half times more expensive. Well I still have them! I have the comfort and ultimately the same expense: 2,5 pairs at 50 euros or a pair at 125 euros which lasts 2,5 times longer ...

In my house, as a rule, for what must last longer than me, say 25 years, I prefer "reputable" brands ... But not necessarily Grohe or some other brand where you pay the mark. No more than I wear these high-end shoes which are the glory of such and such a minister (I'm talking about things that are worth 2 euros).

Not simple !!!

Hi Did

I joined Chatelot on the way of thinking.
I have two examples in mind:

Dacia is cheaper and reliable.
Makita was reliable said an artisan friend but the evolution of the products has made it much less not see at all.

Example: An aging manufacturing chain at Danfoss (on a reliable and amortized product) can be sold for the benefit of another more high tech and the company which buys this famous old chain sells reliable and amortized aging Danfoss under the brand tartampion .

The thermostatic valve might seem like a standard product ...
In a rental (rural cottage), the taps were regulated by an external collar instead of the traditional central button ...

Result, the tenants who did not know it, forced (and broke) the tap by wanting at all costs to turn the center of the tap (which contained only the wax capsules).

For my part, my heating engineer (not to say a fumist), equipped my house with radiators over 2 meters high. He fitted standard taps which are 15cm from the ceiling.
Result, it is too hot at this height, which means you have to adjust the taps to the max or almost.
The valves are often noisily laminating and the radiators heat only on their upper third, ie 60% of the unused exchange surface.

I tried to disassemble a thermostatic head to offset its adjustment threshold ... It is impossible, I only managed to break it.

It will therefore be necessary either:
- That I put the taps at the bottom of the radiator flush with the ground, which involves modifying the hydraulic circuit with plumbing costs ...
- That I replace the thermostatic heads with remote probe heads (bulb) (to bring the probe up to "life").

And there, there is hardly any alternative, one finds the products which go out of the standards only in brands because they have the means to propose a complete offer with a turnover of stock and sufficient margins.

I also have the solution to wait a decade that wall heaters become sufficiently common for the supply of offset bulb valves to become available ...

In another area, I am in great demand to replace my joinery. 10 years ago, the offer was exclusively for renovation, a process that I refuse. Last week, I was approached 3 times by companies who presented themselves as specialists in total removal (while also offering renovation). In short, the world is changing.

5 years ago DIY stores did not keep double-flow CMVs in stock, today, everyone has them ...

I also agree!

You cite in particular the case of devices validated because old.

Dacia, no problem: all that is "critical" is Renault ...

I reacted more against the low end "without a known brand", like the "machinmatic" screwdriver at 19,90 ... Chinese, therefore.

On this type of product, I experienced a lot of setbacks.

I can even show you a manual electric hedge trimmer, which is a vague "copy" of a famous model from BOsch, and which has hardly ever been used! The "blades" were of such poor quality that she pinched the brnahces without cutting them!

I also bought one day a series of 10 LEDs for outdoor lighting. Barely a year later, 1 were burnt (hello 9 hours of operation). Without known brand. Chinese. Here too, now, I take promo brands (hardly more expensive!). It is also made in China, but well designed and controlled for "quality" ...

It just got complicated!

a) the very low-end, we generally identify fairly quickly

b) the high-end, with the big brands, is also known

c) it is between the two that there is everything and its opposite: the real reliable "low cost" type Dacia and the untested imitation not validated with in general big flaws (but not always!) .. This is where, in principle, the right "quality / price" ratio is located.

If you want to equip some rooms (bedroom, bathroom, hallway ...) in programmable thermostatic valve, here is one of good quality per dear: https://www.econologie.com/shop/vanne-th ... p-509.html

I think that the price difference of the electronisation, will be rather weak compared to the most expensive mechanical thermostatic valves that you found (I already bought one at 20 € ...)

This thermostatic valve is a great product.
The USB connection is a big plus.

I used one branded (Honeywell) before having my installation redone. But for my current installation, I am looking for a regulation without electrical power, or even with an accessible adjustment (my valve bodies are 2.20m high).

There are some with remote wireless probe ... I saw that I do not know where. You put your head on the radiator (above). You put a simple (but porgrammable) regulator box at human height in a "neutral" place ...

Price: I don't know anymore !!! Sorry.

Yes I see what you are talking about Didi, but in any case you need a power supply (battery or mains)