Additional positions in house construction: are they useful and reasonably priced?

2022-11-06 21:14:22

In addition to the spots, do not forget the WLAN access points. A small box must also be installed there to hide the cables behind.

2022-11-07 06:11:13

Is €17,300 really cheap for a central ventilation system? It's about a Zehnder system. To me, that seems really expensive for 162m2 living space without a basement...

Honestly, I’m not familiar with the company. However, we had an offer where the system for 155m2 + 75m2 basement was priced at around €30,000. Window rebate ventilations may be suitable in terms of indoor climate, but energy-wise I find them pointless. But that’s up to everyone to decide for themselves.

Construction starts in March 2023. Unfortunately, we won’t receive any subsidies. The tiny thing we need to achieve is energy efficiency class A, because that gave us an interest rate reduction on the financing.

It’s not about the subsidy, but about the building energy law standard that is mandatory from 2023. And that will probably correspond to KFW 55.

2022-11-07 09:16:45

To be honest, I am not familiar with the company. However, we had an offer where the system for 155m2 + 75m2 basement was priced at about €30,000. Window rebate ventilations certainly make sense for the indoor climate, but in terms of energy efficiency, I find them pointless. But everyone has to decide that for themselves.

I don’t know what has happened with prices since 2020, but at that time we had a Tecalor THZ504 in the contract; it is a combined unit of air-water heat pump, hot water storage, and central ventilation system, all in one and installed inside.
And we were charged about 17k€ extra for this device over the gas heating by the construction company. So for the heat pump + controlled residential ventilation, including all work. That’s why it seems extremely expensive to me.
I know that at the beginning we only had a central ventilation system offered, without the heat pump – I think that was around 5000€. But even then it’s hard to compare since it was an extra charge over the Lumos e (decentralized ventilation system), which was included as standard.

2022-11-07 09:24:54

If the central controlled residential ventilation system is currently too expensive for you, you could possibly have ventilation ducts calculated/installed/insulated. Once things have calmed down a bit, you can get the controlled residential ventilation unit yourself and connect it to the duct system. After that, you can a) measure everything yourself (it's not rocket science) or b) commission a maintenance service or similar from a company that will set the air volumes for you right away.

2022-11-07 09:28:46

I don't know what has happened to the prices since 2020, but at that time we had a Tecalor THZ504 in the contract, which is a combination unit of an air-to-water heat pump, hot water storage tank, and central ventilation system, all in one and installed indoors. And we were charged about €17,000 extra for the device compared to the gas heating by the construction company. So for the heat pump + controlled residential ventilation, including all work. That's why it seems extremely expensive to me.

You got off cheaply. Apparently, your first general contractor really charged the additional effort and not the new price of the device. In 2020, around €30,000 was called up as a surcharge for us.

2022-11-07 17:37:16

I don't know what has happened to the prices since 2020, but at that time we had a Tecalor THZ504 in the contract, which is a combination unit of air-water heat pump, hot water storage, and central ventilation system, all in one and installed indoors. And we were charged about €17k extra by the construction company for the unit as a surcharge to the gas heating. So for the heat pump + controlled residential ventilation, including all work. That's why it seems extremely expensive to me. I know we initially only had a central ventilation system in the offer, without the heat pump - I think that was about €5000. But even that is hard to compare since it was an additional cost to the Lumos e (decentralized ventilation system) that was included as standard.

Sounds cheap. However, the €30k was the total cost, not an extra charge.

Similar topics
01.08.2014	Water-bearing wood stove (supplement to the air-water heat pump and controlled residential ventilation with heat recovery)?	10
08.10.2015	KfW70 only with heat pump now?	26
18.04.2016	Air-water heat pump, mechanical ventilation with heat recovery?	17
20.02.2018	Heat pump calculation formula based on heating load	18
28.05.2018	Air-water heat pump or gas + controlled residential ventilation in a 135 sqm single-family house?	19
31.05.2018	Air-water heat pump including ventilation system vs. brine heat pump including ventilation system	15
01.02.2019	Controlled residential ventilation with cooling: brine geothermal heat pump instead of air-to-water heat pump?	30
25.03.2019	Ceiling suddenly too small for controlled residential ventilation!	54
24.07.2019	Energy Saving Ordinance 2016 or KFW 55 for bungalow with air-water heat pump & controlled residential ventilation, optional photovoltaic	47
29.03.2020	Commissioning of 9.3 kWp system combined with air-to-water heat pump and controlled residential ventilation	10
08.07.2020	LWZ 8 CS Premium combi made of air-water heat pump, controlled residential ventilation and hot water storage tank	15
13.07.2020	Heat pump & central residential ventilation	21
28.07.2020	Air-to-water heat pump new build - single-family house with basement - model?	16
15.10.2020	Controlled residential ventilation manufacturer selection - How to approach?	43
08.10.2020	Purchase Price Calculation Evaluation - Central Ventilation System Costs Too High?	12
23.05.2021	Air-water heat pump + controlled residential ventilation - (central ventilation system)	26
18.05.2021	KfW energy calculation with cooling heat pump	22
03.05.2021	Air-water heat pump in KFW55 house / heating load, standards?	13
25.05.2022	Air-to-water heat pump + underfloor heating + controlled residential ventilation with heat recovery - individually room differently temperature controllable?	10

Additional positions in house construction: are they useful and reasonably priced?

hanse987

Hansi H.

kati1337

Dogma

WilderSueden

Hansi H.