Termica Heat Pump Tanks: 300L Stainless Steel, Increased Coil Capacity & Durability Reviews

Hello

I am asking for opinions if anyone has used or installed Termica tanks for heat pumps with an increased coil. I mean a 300L stainless steel tank, whether it has sufficient capacity (heating surface) of the coil. How is the durability of the tanks?

I have had contact with this type of storage tanks in combination with heat pumps up to 7 kW. Reception of heat without a problem - these were not large pumps, so other flows and powers. I don't know what you need it for, so I won't guess.
As for durability - I had cases that a coil pounded. A technician from Termici arrived and during the conversation said that occasionally the coil shoots. This is due to the technological process - bending exactly. He left the tray for replacement, they fixed it. After 2 weeks, they installed an old one with a new coil. I have had 3 such cases (for several dozen assemblies), a production series about 3-5 years ago. The containers got damaged after several years of use.
In general, I think Termica is a BDB company - a heavy, solid product, something to weld on in the event of a socket failure. The 8-year warranty was also significant. The same is their competition - Polish containers from the company Ch .... and. Solid.
However, the complete scheis are stainless steel containers that weigh up to 50 kg (300l capacity). There are two such companies / distributors in Poland - the bottoms in the middle or the coat burst from the side are NOT in the place of welds, only on the sheet metal. Defeat. Personally, I mentioned 5 such. The distributor simply gives a new tray because it is so poor that there is nothing to weld. After 4-5 years warranty, the customer stays with the damaged goods. Misunderstanding...

I asked so because I am planning to install a heat pump at the client's and wanted to choose a tank for it. Earlier, I installed heat recovery tanks and Chełchowski tanks and everything was always ok. There is nothing to limit to one company because customers decide what product they want. From what I know, it is important that there is a large coil exchange surface because the pump will be misleading (the temperature difference is too small). I compared the capacity of the coil in the tank to the heat pumps 300L and comes out in favor of Chełchowski - 3.8m2 and Termica -3.4m2. And then the issue of Termica sheets is made of 304 stainless steel and Chełchowski from higher grade 316L stainless steel - that's why I asked for durability but the guarantees are the same 8 years. The difference is only at higher capacities 400-500L in Chełchowski is still 8 years in Termika 5 years. As I read, the difference in the durability of 304 and 316L is colossal by half. So you say that there was no problem with heat pickup? Is the coil sufficient?

501toyota wrote:

However, the complete scheis are stainless steel containers,

I am just replacing the tank and I was thinking about one with acid, mine with the black one lasted 10 years (unfortunately he shot at a not very good moment).
I'm looking at
-Joule, but they have thin 1-1.2mm sheets and, for example, the DHW coil is 2.3m2 (I'm afraid that it will not work out)
-Chełchowski usually 2mm in what I'm looking for, but one of the sellers wrote that he had a dozen complaints

I also got a black Austria-email kws500 tank with a 5m2 acid water coil

I also looked at Termica, ACV and DeDietrich

Unfortunately, I have to deal with the topic myself, because installers shake off the developer and have fun in modifying the installation.

monteron wrote:

Previously, I installed heat recovery tanks and storage tanks by Chełchowski and everything was always ok.

what will you say about them today?