ᐅ KfW40 house offer with heat pump and mechanical ventilation with heat recovery— is it worth it?
Created on: 25 May 2019 21:19
Q
querys_
Hello everyone,
Today I received a house offer from a prefabricated house supplier.
They list the exhaust air heat pump Nibe F 750 with supply air module SAM 40 as the heating system. The maximum building heating load is said to be 7.5 kW.
Additionally, there is underfloor heating and a 180 L (48 gallon) domestic hot water storage tank.
The house is located near Cologne/Bonn Airport (for climate reference) and is about 120 m² (1,290 sq ft) in size (excluding the basement).
I have already read a lot of negative things about exhaust air heat pumps, so I want to ask again if this system is any good, and if not, what would be an alternative and how much more would that cost?
Thank you very much!
Today I received a house offer from a prefabricated house supplier.
They list the exhaust air heat pump Nibe F 750 with supply air module SAM 40 as the heating system. The maximum building heating load is said to be 7.5 kW.
Additionally, there is underfloor heating and a 180 L (48 gallon) domestic hot water storage tank.
The house is located near Cologne/Bonn Airport (for climate reference) and is about 120 m² (1,290 sq ft) in size (excluding the basement).
I have already read a lot of negative things about exhaust air heat pumps, so I want to ask again if this system is any good, and if not, what would be an alternative and how much more would that cost?
Thank you very much!
Jenpa schrieb:
Aren't eligible heating systems listed on the Bafa site?Thanks, I just checked! The heating system offered is included!
Jenpa schrieb:
It might be that instead of a domestic hot water tank, you will heat with instantaneous water heaters at the points of use.That wouldn’t be a big issue for me; I’ve never had it any other way in my life. At least I wouldn’t need to keep hot water ready when I don’t need it.querys_ schrieb:
Buderus Logatherm WPL 8 AR I assume it is the WPL 8 AR T.
This model features an integrated 190 liter (50 gallon) hot water tank.
However, the 6 model should be sufficient if a ventilation system with heat recovery is installed. That option is about 1500€ cheaper.
After a lot of back and forth, I found out that the Buderus system does not include controlled ventilation and does not have a central hot water storage tank.
Last week, I had an interesting discussion with the company Nibe. Even the technician was not really convinced about the air-to-water heat pump.
In the end, the following solution came up:
Nibe SMO 40 + F2120 air-to-water heat pump + hot water storage tank
combined with ERS 10-400 ventilation unit.
Alternatively, instead of SMO 40, the VV320 could be used, but this would require a buffer tank for the heating system, which I actually don’t need with underfloor heating.
In the end, this should not be much more expensive than the offered F750 + SAM 40. Additionally, I can still receive a 2000 euro government subsidy (BAFA).
Last week, I had an interesting discussion with the company Nibe. Even the technician was not really convinced about the air-to-water heat pump.
In the end, the following solution came up:
Nibe SMO 40 + F2120 air-to-water heat pump + hot water storage tank
combined with ERS 10-400 ventilation unit.
Alternatively, instead of SMO 40, the VV320 could be used, but this would require a buffer tank for the heating system, which I actually don’t need with underfloor heating.
In the end, this should not be much more expensive than the offered F750 + SAM 40. Additionally, I can still receive a 2000 euro government subsidy (BAFA).
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