ᐅ Basic Information on Radiator Replacement in Older Buildings
Created on: 12 Jul 2023 13:57
A
Alibert87
Hello everyone,
We want to replace the radiators in the children’s rooms or rather install new ones. What exactly do I need for that?
I need some basic information.
The house was built in 1981, gas heating (condensing boiler), underfloor heating on the ground floor, radiators upstairs.
Niches were bricked up and the heating pipes were left about 50cm (20 inches) apart.
Should I buy radiators that are suitable for low-temperature heating systems?
Are DIY store radiators much worse than, for example, a Kermi x2 (is the higher price worth it)?
Thanks a lot!!
We want to replace the radiators in the children’s rooms or rather install new ones. What exactly do I need for that?
I need some basic information.
The house was built in 1981, gas heating (condensing boiler), underfloor heating on the ground floor, radiators upstairs.
Niches were bricked up and the heating pipes were left about 50cm (20 inches) apart.
Should I buy radiators that are suitable for low-temperature heating systems?
Are DIY store radiators much worse than, for example, a Kermi x2 (is the higher price worth it)?
Thanks a lot!!
W
WilderSueden14 Jul 2023 21:16Buchsbaum schrieb:
I wonder why owners of gas or oil heating systems haven’t lowered their supply temperature to 30°C (86°F) all these years, which would have significantly reduced their consumption. Because oil and gas burn at temperatures well above a thousand degrees, and the efficiency of oil and gas systems depends far less on the supply temperature. It’s that simple. That’s also why a gas heating system can tolerate poor hydraulic balancing without much issue.
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Alibert8714 Sep 2023 14:38KarstenausNRW schrieb:
Finally, a simple and nice question again ;-)
Is there a heating load calculation or do you know what type of radiator was installed? Then you have two options.
1. Direct 1:1 replacement
2. Replacement with a heat pump-compatible radiator
Heat pump-compatible radiators that work well even with lower energy efficiency are Type 33 radiators. It doesn’t really matter if the radiators are from a DIY store or branded products. Branded ones might have slightly better specifications. Recently, I just ordered online (for a whole apartment). Buderus (which is Bosch) radiators are often found in DIY stores as well.
You can also choose based on appearance: smooth or ribbed. Depending on the pipe connection layout (where the pipes are located), different models are available. With suitable adapters or S-connector fittings, you can also connect pipes that are “at the wrong height.” Mounting hardware is usually included.
If you’re planning to switch to a heat pump someday or want to lower the flow temperature throughout the whole house, go directly for Type 33 radiators. You can also check out heizungsdiscount24 or compare options on other major shops. Sorry for the late reply! I would like to simply replace the fairly good but inexpensive Type 22 radiators. The plan is to also use an air conditioner for heating.
The heating engineer who explained our gas system to me said that you can’t just read or set the flow temperature?! It’s a Junkers ZSB condensing boiler, about 14 years old.
So, if that’s the case, how can I test how low I can set the flow temperature?
I’m a bit unsure.
I don’t want to replace the heating system.
K
KarstenausNRW15 Sep 2023 08:46Alibert87 schrieb:
I would like to simply replace the somewhat good but affordable 22-type radiators. Why not 33-type? They’re all affordable.
Alibert87 schrieb:
The heating engineer who explained our gas system to me said you can’t simply read or set the supply temperature?!? It’s a Junkers ZSB condensing boiler (about 14 years old). Specific model and exact control system?
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