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Forums
Renewable energies
Heat Pumps / Ventilation Systems
Discover how to save energy with heat pumps and ventilation systems and create a healthy indoor climate – learn what to watch out for when choosing and installing!
P
Problems with controlling the heat pump
4.5 Stern(e)
3 Voting
2024-01-06 10:38:00
Answers
17
P
Power consumption of a heat pump
4.5 Stern(e)
9 Voting
2023-12-17 15:55:41
Answers
65
A
Atypically high offer for ventilation system
5 Stern(e)
4 Voting
2023-12-10 09:02:21
Answers
92
H
How to effectively reduce power consumption in BWP and circulation line?
5 Stern(e)
4 Voting
2023-12-18 08:54:23
Answers
0
F
Fault reports for Novelan heat pump - experiences?
5 Stern(e)
4 Voting
2023-12-10 09:37:46
Answers
1
H
Heat pump: buffer tank, capacity and modulation
4.5 Stern(e)
7 Voting
2023-10-04 17:32:19
Answers
46
W
Waiting time after commissioning heat pump
5 Stern(e)
5 Voting
2023-11-22 12:31:38
Answers
5
E
Experiences ERW Heat Pump Technology
4.5 Stern(e)
6 Voting
2014-10-18 09:34:52
Answers
4
K
KfW 261 - Replacement of oil heating with heat pump - disposal of oil heating
4.5 Stern(e)
5 Voting
2023-11-17 12:02:39
Answers
6
I
Interpretation of Earth Drilling Experiences
4 Stern(e)
3 Voting
2023-11-03 22:52:35
Answers
8
S
Service water heat pump with return flow utilization
4 Stern(e)
3 Voting
2023-11-13 10:16:26
Answers
5
H
Heat pump in the transition period
4 Stern(e)
5 Voting
2023-10-12 14:42:10
Answers
34
S
Settings for the heat pump
5 Stern(e)
3 Voting
2023-11-06 11:13:55
Answers
3
H
Heat pump properly adjusted - experiences
5 Stern(e)
5 Voting
2023-10-28 22:55:30
Answers
4
C
Central ventilation system for EH 40 only approved with DIBT certified devices?
4 Stern(e)
3 Voting
2023-10-30 22:41:40
Answers
4
W
Warranty extension for heat pump from alpha innotec - is it worth it?
4.5 Stern(e)
3 Voting
2023-10-25 17:20:17
Answers
4
G
Geothermal heat pump installation location and preparation
5 Stern(e)
4 Voting
2023-10-18 12:00:47
Answers
8
H
Heating during "high daytime temperatures in autumn"
5 Stern(e)
5 Voting
2023-10-19 09:53:54
Answers
3
A
Air-water heat pump: split or combined unit?
4.5 Stern(e)
3 Voting
2023-10-13 10:32:31
Answers
1
S
Selection of heat pump in new construction via general contractor
4.5 Stern(e)
5 Voting
2023-10-11 17:08:26
Answers
8
H
How to plan heating with a heat pump in new construction?
4.5 Stern(e)
5 Voting
2023-09-30 17:29:11
Answers
14
E
Estimate electricity consumption with heat pump
5 Stern(e)
9 Voting
2023-05-16 13:41:41
Answers
30
O
Optimization of heat pump LWD 70A with photovoltaics
5 Stern(e)
4 Voting
2023-09-03 16:22:35
Answers
16
W
Wolf CWL-2 Ventilation System - Request for a second opinion
4.5 Stern(e)
6 Voting
2023-08-29 21:16:30
Answers
4
I
Insufficient depth of pipes to the ground probes?
4.5 Stern(e)
5 Voting
2023-08-06 14:03:18
Answers
7
D
Does the ventilation system really pump humid outside air into the house?
4.5 Stern(e)
5 Voting
2023-08-13 22:37:29
Answers
13
P
Purchase advice, heat pump comparison: Daikin or Vaillant?
4.5 Stern(e)
4 Voting
2023-08-10 09:02:28
Answers
19
H
Hot water preparation heat pump
4.5 Stern(e)
5 Voting
2023-07-28 11:56:28
Answers
13
A
Air-to-air vs. air-to-water heat pump KFW55 house - cooling function important
4 Stern(e)
5 Voting
2023-06-26 14:32:29
Answers
48
T
The ventilation system is loud and disturbing
5 Stern(e)
5 Voting
2023-07-18 10:40:26
Answers
21
R
Room thermostat moist on the front side
5 Stern(e)
5 Voting
2023-07-12 11:33:24
Answers
2
I
Is the replacement of the roof window in the bathroom included in the subsidy for the heat pump?
4.5 Stern(e)
7 Voting
2023-07-10 09:02:14
Answers
10
M
Monoblock connection with heat conduction on or under the floor slab?
5 Stern(e)
5 Voting
2023-07-03 20:37:16
Answers
5
S
Sole-water heat pump with ground probe experiences?
5 Stern(e)
8 Voting
2023-02-01 23:05:41
Answers
42
H
Heating decision: air-to-air or air-to-water heat pump
4.5 Stern(e)
6 Voting
2023-06-19 11:18:01
Answers
27
I
Is repositioning the heat pump sensible or unnecessary?
4.5 Stern(e)
3 Voting
2023-06-19 13:15:56
Answers
4
H
Height of the base of the outdoor unit heat pump
4.5 Stern(e)
4 Voting
2023-06-15 15:55:25
Answers
10
H
Heat pump with propane Weishaupt WAB 11
4.5 Stern(e)
4 Voting
2023-06-18 14:06:10
Answers
1
V
Ventilation system in the warm summer
4.5 Stern(e)
4 Voting
2023-06-13 07:50:53
Answers
47
A
Air-water heat pump behind carport
5 Stern(e)
6 Voting
2023-06-11 01:42:12
Answers
9
W
What pressure difference (Pa) is there in controlled residential ventilation?
5 Stern(e)
4 Voting
2020-03-15 11:46:06
Answers
1
I
Installation of the brine-water heat pump? 2 options, impact on the COP?
4.5 Stern(e)
5 Voting
2023-05-17 14:03:31
Answers
2
V
Ventilation / aeration in the wall instead of over the roof
4.5 Stern(e)
5 Voting
2023-05-05 21:52:57
Answers
1
I
Indoor installation of heat pump: What should be considered regarding the air ducts?
4.5 Stern(e)
4 Voting
2023-05-01 09:39:24
Answers
1
S
Subsidy for heat pump despite continued operation of existing condensing boiler
4.5 Stern(e)
6 Voting
2023-04-29 10:52:56
Answers
4
A
Availability of hydrological reports for heat pump
4.5 Stern(e)
3 Voting
2023-04-26 19:05:47
Answers
2
C
Controlled residential ventilation planning/design, experiences
4.5 Stern(e)
5 Voting
2023-04-25 10:54:33
Answers
6
H
Heat pump LWZ 403 Sol high supply + return in solar thermal. Underfloor heating is malfunctioning...
4.5 Stern(e)
4 Voting
2023-04-10 21:23:27
Answers
13
C
Costs for water-brine heat pump and heating installation
4.5 Stern(e)
3 Voting
2023-04-18 14:03:00
Answers
0
C
Connect pool room to controlled residential ventilation? Chlorinated water? Condensation?
4 Stern(e)
3 Voting
2023-03-19 21:27:51
Answers
6
C
Correct interpretation of the heat pump
4.5 Stern(e)
3 Voting
2023-04-06 12:49:07
Answers
5
S
Sole heat pump - Which model?
5 Stern(e)
4 Voting
2023-03-29 13:46:06
Answers
1
E
Expand ground source heat pump to heat a small indoor pool
4.5 Stern(e)
3 Voting
2023-03-19 21:24:12
Answers
18
C
Can flies enter the house through controlled residential ventilation?
4.5 Stern(e)
4 Voting
2023-03-02 10:36:07
Answers
20
H
Heat Pump Location - Basic Tips
4.5 Stern(e)
4 Voting
2023-03-01 10:29:34
Answers
3
A
Air heat pump with cooling - Thermostats
5 Stern(e)
4 Voting
2023-02-28 12:45:37
Answers
0
I
Is my heat pump from alpha innotec good?
4.5 Stern(e)
6 Voting
2023-02-23 22:27:59
Answers
10
W
Workshop heating and dehumidifying
4.5 Stern(e)
4 Voting
2023-02-18 19:29:18
Answers
8
N
NOVELAN LAD9 heat pump error 704
4.5 Stern(e)
3 Voting
2023-02-09 07:11:27
Answers
8
A
Air-to-water heat pump: choice between Viessmann and Ochsner
4 Stern(e)
5 Voting
2023-01-31 18:13:34
Answers
8
D
Does a ventilation system also filter asbestos safely from the air?
4.5 Stern(e)
3 Voting
2023-01-20 08:41:47
Answers
3
I
Internal heat pump in the basement not possible due to groundwater?
5 Stern(e)
5 Voting
2023-01-10 19:40:21
Answers
37
A
Air-water heat pump - COP realistic?
4.5 Stern(e)
4 Voting
2023-01-11 12:01:02
Answers
3
A
Alternative air-water heat pump to Weishaupt WBB 12-A RMD-AI?
4.5 Stern(e)
3 Voting
2022-12-31 10:29:16
Answers
9
C
Controlled Residential Ventilation & Heat Pump: Viessmann vs. Vaillant vs. Zehnder?
5 Stern(e)
7 Voting
2022-11-23 14:12:48
Answers
47
E
Enthalpy heat exchanger central controlled residential ventilation
4.5 Stern(e)
3 Voting
2022-11-14 11:01:27
Answers
29
H
High humidity despite decentralized ventilation system
4.5 Stern(e)
5 Voting
2022-10-07 13:18:21
Answers
16
A
Are the supply and exhaust air valves okay?
5 Stern(e)
4 Voting
2022-11-15 05:24:00
Answers
5
P
Positions of supply and exhaust air valves
4.5 Stern(e)
4 Voting
2022-11-13 20:38:38
Answers
4
P
Positioning of the air heat pump
5 Stern(e)
5 Voting
2022-11-01 17:30:17
Answers
5
H
Heat pump not available. Bridge with a mobile device?
4.5 Stern(e)
6 Voting
2022-10-22 09:12:13
Answers
5
V
Volume flow rate specification of controlled residential ventilation for heating load calculation
4.5 Stern(e)
3 Voting
2022-10-14 01:44:29
Answers
10
C
Central controlled residential ventilation with heat recovery: Are rooms individually controllable?
4 Stern(e)
3 Voting
2015-04-23 11:59:13
Answers
20
V
Ventilation through wall or ceiling outlets?
4 Stern(e)
3 Voting
2022-07-24 00:39:07
Answers
10
V
Ventilation system as a combined unit with Bafa funding
4.5 Stern(e)
4 Voting
2022-07-15 19:36:45
Answers
3
V
Ventilation system cellar without windows
4.5 Stern(e)
3 Voting
2022-06-13 13:17:11
Answers
18
C
Can the apartment ventilation system of controlled residential ventilation enter the sheds?
4.5 Stern(e)
5 Voting
2022-06-11 00:22:45
Answers
11
C
Controlled residential ventilation number of ventilation inlets and outlets
4.5 Stern(e)
3 Voting
2022-06-11 00:48:28
Answers
1
A
Air fountain / Drainage pipe for preheating of the return cold water (ZWL)?
5 Stern(e)
3 Voting
2022-06-10 21:30:31
Answers
1
E
Electricity meter for air-water heat pump, normal electricity, and photovoltaics?
5 Stern(e)
5 Voting
2022-06-08 10:03:41
Answers
5
D
Dual fan variants: advantages and disadvantages
4.5 Stern(e)
4 Voting
2022-06-07 00:56:57
Answers
10
D
decentralized ventilation - various manufacturers
5 Stern(e)
5 Voting
2012-10-30 18:27:40
Answers
39
W
Which decentralized ventilation system is sensible?
5 Stern(e)
6 Voting
2021-06-06 12:27:21
Answers
7
C
Central ventilation system - cooling/heating air through underground pipes?
4.5 Stern(e)
4 Voting
2022-06-06 19:39:31
Answers
1
A
Air-water heat pump + central ventilation system with active cooling - Which one?
4.5 Stern(e)
5 Voting
2022-06-04 14:57:59
Answers
7
A
Air-to-water heat pump, central ventilation system, and air conditioning
5 Stern(e)
4 Voting
2019-12-28 12:50:56
Answers
4
P
Planning controlled residential ventilation via local heating / sanitary company
4.5 Stern(e)
7 Voting
2022-05-03 21:31:35
Answers
20
C
Controlled residential ventilation - alternative positioning of supply air valves
4.5 Stern(e)
4 Voting
2022-05-22 13:23:15
Answers
7
R
Rotex heat pump experiences with solar thermal collectors
5 Stern(e)
3 Voting
2022-03-18 08:58:46
Answers
4
P
Pluggit B 90 ventilation system experiences
4 Stern(e)
5 Voting
2022-03-09 21:45:22
Answers
0
W
with / without central ventilation system experiences
4.5 Stern(e)
7 Voting
2022-03-05 15:32:03
Answers
48
F
Floor outlets (supply air) under sofa and desks?
4.5 Stern(e)
5 Voting
2018-07-14 01:03:10
Answers
36
I
Interpretation of a central ventilation system
5 Stern(e)
5 Voting
2022-03-01 16:33:12
Answers
17
A
Air source heat pump and controlled residential ventilation in terraced mid-terrace house
4.5 Stern(e)
5 Voting
2022-03-01 07:21:36
Answers
4
E
Energetic renovation of old buildings - is a ventilation system necessary or not?
4.5 Stern(e)
4 Voting
2022-01-04 14:22:13
Answers
12
T
Turn off Danfoss Airunit W2 at high electricity prices
4.5 Stern(e)
4 Voting
2022-02-16 21:40:34
Answers
2
P
Problems with unwanted drafts
4.5 Stern(e)
5 Voting
2022-02-13 01:05:17
Answers
15
M
Maintenance contract residential ventilation, cheaper filters
5 Stern(e)
4 Voting
2022-02-08 11:32:46
Answers
29
E
Extremely dry air due to ventilation heating - what can we do?
5 Stern(e)
8 Voting
2014-03-02 07:56:12
Answers
27
D
decentralized residential ventilation Vario-Vent (ZSA)
NAN Stern(e)
0 Voting
2017-01-06 19:08:25
Answers
16
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