ᐅ Heat Pumps / Ventilation Systems

Discover how heat pumps and ventilation systems can help you save energy and create a healthy indoor climate – learn what to consider when choosing and installing them!

Experience with Solar Thermal Collectors and Rotex Heat Pumps

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Pero70_15a•18 Mar 2022 08:58

Answers: 4

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Deliverer • 21 Mar 2022 20:47

Experiences with the Pluggit B 90 Ventilation System

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HeinrichM•9 Mar 2022 21:45

Answers: 0

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HeinrichM • 9 Mar 2022 21:45

With or without a central ventilation system – experiences

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SebbSebb•5 Mar 2022 15:32

Answers: 48

Tolentino • 9 Mar 2022 16:30

Floor vents (fresh air supply) located under sofas and desks?

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cybergnom•14 Jul 2018 01:03

Answers: 36

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DerFenk • 9 Mar 2022 13:09

Design of a Central Ventilation System

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Jentopa•1 Mar 2022 16:33

Answers: 17

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Jentopa • 7 Mar 2022 09:48

Air Source Heat Pump and Controlled Mechanical Ventilation in a Mid-Terrace House

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Danieltt•1 Mar 2022 07:21

Answers: 4

Hangman • 1 Mar 2022 08:30

Energy-Efficient Renovation of Older Buildings – Is a Ventilation System Necessary or Not?

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Flitz86•4 Jan 2022 14:22

Answers: 12

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Flitz86 • 21 Feb 2022 10:55

Turning Off the Danfoss Airunit W2 During High Electricity Prices

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Thorben81•16 Feb 2022 21:40

Answers: 2

Tolentino • 17 Feb 2022 09:20

Issues with Unintended Drafts

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Porselll•13 Feb 2022 01:05

Answers: 15

KingJulien • 16 Feb 2022 02:27

Maintenance Contract for Residential Ventilation System, More Affordable Filters

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Daniela Sch.•8 Feb 2022 11:32

Answers: 29

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Daniela Sch. • 12 Feb 2022 17:28

Extremely dry air caused by ventilation heating – what can we do?

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Joela•2 Mar 2014 07:56

Answers: 27

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Deliverer • 31 Jan 2022 09:29

Decentralized residential ventilation system Vario-Vent (ZSA)

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mauhin•6 Jan 2017 19:08

Answers: 16

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frankrv • 18 Jan 2022 11:14

Are the ventilation settings correct? - The electricity consumption seems quite high.

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Tx-25•11 Jan 2022 17:33

Answers: 4

Mycraft • 12 Jan 2022 10:49

Question about daily living with a mechanical ventilation system with heat recovery

Becker84•11 May 2016 08:04

Answers: 58

Mycraft • 10 Jan 2022 20:03

Condensation or puddles on pipes – despite controlled mechanical ventilation and dehumidifiers

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Abzug86•31 Dec 2021 11:06

Answers: 11

KingJulien • 31 Dec 2021 16:06

Rough-in installation of central ventilation system

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Prager91•22 Dec 2021 07:51

Answers: 20

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Harakiri • 22 Dec 2021 13:35

Mechanical ventilation with heat recovery + earth tube ventilation + exhaust hood ventilation and independent chimney

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Stephan—•11 Feb 2021 23:10

Answers: 15

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Stephan— • 14 Dec 2021 15:39

Passive house with mechanical ventilation system: fresh air intake covered by a piece of furniture

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peacefrog82•6 Dec 2021 15:03

Answers: 1

Mycraft • 6 Dec 2021 15:49

Complete ventilation duct for upper floor through timber stud wall?

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Christian144•29 Nov 2021 13:18

Answers: 3

Mycraft • 29 Nov 2021 18:25

Mechanical ventilation with heat recovery using enthalpy or rotary heat exchangers

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Taube05•5 Apr 2020 21:15

Answers: 25

Nixwill • 29 Nov 2021 11:59

Minimum Distance Between Vent Outlet and Obstruction

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cybergnom•23 Nov 2021 12:23

Answers: 4

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cybergnom • 23 Nov 2021 16:49

ERV Supply and Exhaust Air for an Extension

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lesmue79•13 Nov 2021 22:53

Answers: 2

debaser • 15 Nov 2021 12:04

Central Ventilation System – Air Outlet in the Floor or Ceiling?

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HoisleBauer22•31 Oct 2021 22:23

Answers: 11

AxelH. • 1 Nov 2021 10:26

Central Ventilation System – Required Sensors, Intelligent Control

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HoisleBauer22•22 Oct 2021 23:32

Answers: 5

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HoisleBauer22 • 23 Oct 2021 19:06

Manufacturers / Brands for Central Ventilation Systems? Selection Criteria?

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HoisleBauer22•18 Oct 2021 18:16

Answers: 11

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HoisleBauer22 • 22 Oct 2021 22:09

Ventilation System – What Factors Affect Noise Levels?

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Dany250•15 Oct 2021 16:37

Answers: 53

11ant • 19 Oct 2021 23:35

Noise levels of the ventilation system

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BBaumeister•29 Sep 2021 14:08

Answers: 19

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konibar • 7 Oct 2021 22:44

Looking for experiences with Lossnay Preheat 50 and Preheat 100 (Mitsubishi)

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heinzie•1 Oct 2021 19:17

Answers: 0

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heinzie • 1 Oct 2021 19:17

Controlled residential ventilation – external ventilation ducts – topic: condensation

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alive&kicking•25 Sep 2021 00:35

Answers: 4

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alive&kicking • 28 Sep 2021 23:43

Planning a Mechanical Ventilation System with Heat Recovery: Component Placement and Duct Lengths

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domino649•18 Jun 2021 20:29

Answers: 13

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schaaaf • 21 Sep 2021 14:44

Ventilation Profiles Vallo Plus 510MV

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Missiman•29 Aug 2021 21:27

Answers: 4

opalau • 31 Aug 2021 10:04

How to Inject Silicone into a Vent Pipe That Has Been Drilled?

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Pädda•16 Jul 2021 13:34

Answers: 4

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BBaumeister • 20 Aug 2021 09:04

Making Your Own Filter: What Should You Keep in Mind?

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Sunny_Girl•18 Jul 2021 00:19

Answers: 3

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BBaumeister • 20 Aug 2021 08:59

Distance between exhaust air outlet and fresh air intake only 2 meters

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chrisreal89•26 Jul 2021 16:15

Answers: 17

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chrisreal89 • 5 Aug 2021 11:22

Neighbor’s ventilation system set too high and therefore too noisy?

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Toja007•19 Jul 2021 16:43

Answers: 34

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Snowy36 • 23 Jul 2021 13:14

Mechanical Ventilation with Heat Recovery – Planning the Locations for Supply and Exhaust Air

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mwinkelm•5 May 2021 02:01

Answers: 60

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erazorlll • 23 Jun 2021 00:04

Controlled residential ventilation supply air in the living area near the sofa

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kasse-tk•29 May 2021 14:19

Answers: 19

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Dogma • 2 Jun 2021 11:47

Is mechanical ventilation with heat recovery necessary for lightweight expanded clay aggregate construction and KfW55 standard homes?

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Matthias_1212•19 May 2021 07:34

Answers: 29

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Bookstar • 20 May 2021 21:57

Alternative to Centralized/Decentralized Ventilation

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Unentschlossen•2 Apr 2021 22:59

Answers: 61

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netuser • 6 May 2021 17:30

Decentralized ventilation system with minimal visibility on the exterior facade

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Hausbauin2021•8 Apr 2021 11:18

Answers: 47

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Snowy36 • 19 Apr 2021 12:34

KfW 55 – Ventilation System: Yes or No? – Experiences

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exto1791•19 May 2020 13:29

Answers: 222

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saralina87 • 18 Apr 2021 14:32

Controlled residential ventilation in the basement with outdoor air supplied through the roof

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uncelsam•6 Apr 2021 20:40

Answers: 7

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uncelsam • 11 Apr 2021 16:58

Ventilation System in a Single-Family Home Not Working – Planning Mistake?

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jeti79•1 Feb 2021 19:35

Answers: 87

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T_im_Norden • 8 Apr 2021 19:02

Experiences with the Pluggit AP310 and DH160-KS Roof Penetration

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Häuslebauer124•27 Feb 2021 12:23

Answers: 4

Mycraft • 6 Mar 2021 20:23

Ventilation in the attic dressing room was overlooked.

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Lostie•5 Mar 2021 19:37

Answers: 9

11ant • 6 Mar 2021 13:24

Condensation at the ventilation outlet

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Tx-25•1 Mar 2021 16:19

Answers: 27

Mycraft • 5 Mar 2021 18:00

Which mechanical ventilation system is compatible with a Viessmann heating system when applying for BAFA funding?

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Matthias_1212•4 Jan 2021 20:54

Answers: 7

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Fleckenzwerg • 19 Feb 2021 10:14

Install ventilation ducts for the controlled residential ventilation system through the sloped roof ceiling.

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Guido1980•14 Feb 2021 14:21

Answers: 12

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Guido1980 • 15 Feb 2021 11:28

Ceiling vents with a stylish design – do such options exist?

Tolentino•10 Feb 2021 10:08

Answers: 33

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T_im_Norden • 10 Feb 2021 20:10

Controlled ventilation system manufacturers – Which ones are recommended and where can you arrange the design?

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Mateo84•14 Sep 2020 20:23

Answers: 17

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pagoni2020 • 10 Feb 2021 14:13

Central Residential Ventilation – Space Requirements?

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Michael1988•22 Jan 2021 14:01

Answers: 7

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borxx • 28 Jan 2021 20:16

Dimplex Controlled Residential Ventilation Distance Between Exhaust and Supply Air Outlets / Outdoor Air Intakes

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nick205•14 Jan 2021 16:06

Answers: 5

Mycraft • 14 Jan 2021 17:41

Basement Ventilation Using Multi-Room Systems

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TheKMKM•11 Jan 2021 12:04

Answers: 4

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matte • 12 Jan 2021 11:57

Vallox 510 MV basement installations with external soil stacks placed side by side?

Subwkloofer•13 Dec 2020 20:58

Answers: 9

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mini_g! • 11 Jan 2021 12:41

Ventilation Controlled mechanical ventilation in the living room concealed by a sliding door

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Bertram100•9 Jan 2021 15:54

Answers: 17

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Bertram100 • 10 Jan 2021 10:47

Retrofitting a Central Ventilation System for the Attic

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Oraclefile•2 Dec 2020 11:00

Answers: 4

Mycraft • 2 Dec 2020 13:24

House with 180 m² => RecoVair VAR 260/4 or better 360/4?

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Christian NW•7 Jul 2018 12:01

Answers: 17

OWLer • 19 Nov 2020 09:49

Noise level standard for ventilation system in the bathroom

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ManuelRauber•3 Nov 2020 11:08

Answers: 2

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ManuelRauber • 3 Nov 2020 13:02

Air Exchange Rates and Indoor Air Quality – An Overview

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Bookstar•19 Oct 2020 09:37

Answers: 27

opalau • 19 Oct 2020 20:53

Choosing a Mechanical Ventilation with Heat Recovery System Manufacturer – How to Approach?

ts-mc•5 Oct 2020 22:38

Answers: 43

ts-mc • 15 Oct 2020 23:23

Controlled residential ventilation: Placement of supply and exhaust air in my designs

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Shiny86•12 Oct 2020 00:03

Answers: 44

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Shiny86 • 15 Oct 2020 17:09

New Construction: Floor Structure / Ceiling Thickness for Ductwork of Mechanical Ventilation Systems

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Martial.white•11 Aug 2020 20:08

Answers: 10

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Martial.white • 15 Oct 2020 13:32

Is an additional charge for controlled residential ventilation reasonable in a general contractor contract?

Tolentino•1 Sep 2020 08:31

Answers: 7

Tolentino • 8 Oct 2020 17:59

Is the Absence of a Ventilation Outlet in the Hallway a Serious Issue?

kati1337•10 Sep 2020 17:00

Answers: 12

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Bookstar • 11 Sep 2020 09:12

Controlled ventilation system in a bungalow: Is it necessary to lower the ceiling?

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Reluctance•5 Jul 2019 18:51

Answers: 23

Mycraft • 10 Aug 2020 10:09

Height of floor construction with Vallox HRV ducting questionable

Subwkloofer•7 Jul 2020 07:19

Answers: 34

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Lumpi_LE • 17 Jul 2020 12:55

Duct Installation: Supply and Exhaust Air Above the Doors or in the Center of the Room?

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annab377•15 Jun 2020 16:48

Answers: 5

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micric3 • 9 Jul 2020 07:42

Is a Central Ventilation System Really Necessary?

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Katha28•23 Mar 2014 20:38

Answers: 54

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Bookstar • 6 Jul 2020 21:25

Use an Air Source Heat Pump or Gas and Solar?

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gigi•11 Jul 2012 19:15

Answers: 300

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MayrCh • 25 Jun 2020 14:04

Mechanical ventilation with heat recovery in the hallway as well? We don't have that – the air feels stuffy.

chewbacca123•19 Jun 2020 09:38

Answers: 11

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ypg • 19 Jun 2020 19:01

Decentralized Ventilation System: Which Manufacturer?

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TheKMKM•29 Sep 2019 12:27

Answers: 9

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Specki • 15 Jun 2020 07:19

Ventilation in summer without a mechanical ventilation system can be challenging

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TheKMKM•12 Jun 2020 21:05

Answers: 19

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TheKMKM • 14 Jun 2020 11:44

Partial Controlled Residential Ventilation / Retrofitting Climate Control in the Attic

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derdom•4 Jun 2020 14:32

Answers: 12

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derdom • 6 Jun 2020 19:48

Heat pump system incentives

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Eigenheim_2011•31 May 2020 17:16

Answers: 5

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Eigenheim_2011 • 1 Jun 2020 09:07

Decentralized ventilation only in individual rooms for new construction to KfW 55 standard?

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AlbertKamika•10 Mar 2020 11:07

Answers: 26

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Einradbrot • 28 May 2020 19:46

Decentralized ventilation system and 4-Pascal pressure switch

constantin_w•22 Aug 2017 11:54

Answers: 5

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Einradbrot • 28 May 2020 01:07

Proper Ventilation Practices Without a Mechanical Ventilation System

seat88•28 Nov 2019 18:00

Answers: 19

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Bookstar • 11 May 2020 13:45

Installing a Mechanical Ventilation System with Heat Recovery in a Basement - Supply and Exhaust Air, Any Tips?

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Grobmutant•13 Dec 2019 09:30

Answers: 15

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Grantlhaua • 7 May 2020 08:39

Heat Pump in New Construction without a Solar Power System

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frsytiwo•3 May 2020 00:27

Answers: 15

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hauspeter • 4 May 2020 22:15

Central ventilation system for both supply and exhaust instead of a central exhaust-only system

bvb09•17 Jan 2020 20:34

Answers: 7

Mycraft • 16 Apr 2020 09:31

Bathroom Ventilation – Is an Additional Exhaust Fan Needed for the Shower?

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Bertram100•11 Apr 2020 22:49

Answers: 5

Vicky Pedia • 12 Apr 2020 12:42

CO2 Sensor for Mechanical Ventilation with Heat Recovery

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robin1988•1 Apr 2020 10:12

Answers: 1

Mycraft • 1 Apr 2020 10:53

Low Indoor Humidity Level (25%)

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Minuk1234567•25 Mar 2020 22:10

Answers: 19

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gnika77 • 29 Mar 2020 20:27

Seal ceiling penetration for ventilation

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Wintersonne•23 Mar 2020 23:47

Answers: 10

Golfi90 • 24 Mar 2020 20:17

Do ventilation ducts need to be insulated?

Golfi90•27 Feb 2020 10:46

Answers: 13

wrobel • 28 Feb 2020 07:46

Water Ingress Through Ventilation System: What to Do and Liability Issues?

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Pfluecki•23 Feb 2020 17:24

Answers: 20

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apokolok • 25 Feb 2020 13:57

Mechanical Ventilation with Heat Recovery for New Construction – Duct Installation

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Mateo84•14 Feb 2020 08:17

Answers: 8

Mycraft • 14 Feb 2020 13:34

Where should the ventilation duct for a mechanical ventilation system be installed?

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TiSa1920•4 Feb 2020 15:04

Answers: 17

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Müllerin • 4 Feb 2020 21:03

Is KfW 40+ achievable with a decentralized ventilation system?

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Specki•4 Dec 2019 08:00

Answers: 8

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Kardionaut • 30 Jan 2020 17:37

Lower Indoor Temperature After Starting Operation of Mechanical Ventilation with Heat Recovery

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chrisw81•24 Jan 2020 13:15

Answers: 14

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guckuck2 • 25 Jan 2020 18:11

Central ventilation system – is humidity recovery necessary?

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ludwig88sta•30 Dec 2019 16:17

Answers: 113

truce • 10 Jan 2020 22:38

Electricity Consumption of Your Heat Pumps – Comparative Figures?

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KrustyDerClown•5 Jan 2018 00:33

Answers: 22

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guckuck2 • 3 Jan 2020 10:21

Difference in Initial Costs: Gas System vs. Heat Pump

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Heidi1965•14 Dec 2019 15:33

Answers: 74

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Lumpi_LE • 20 Dec 2019 09:14

Planning a central ventilation system – airflow volume, positioning?

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0per8or•27 Nov 2019 13:25

Answers: 12

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bernie • 19 Dec 2019 18:42

Jamb Ventilation – How Large Should the Air Gap Be?

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Reini1234•2 Dec 2019 11:16

Answers: 14

opalau • 9 Dec 2019 23:30

Cancel planned decentralized ventilation system?

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Sternchen31•8 Nov 2019 12:18

Answers: 11

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Evolith • 12 Nov 2019 07:14

Which Heat Pump Is Suitable for Monolithic Construction?

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Annika90•4 Nov 2019 10:26

Answers: 33

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Bookstar • 5 Nov 2019 16:51

Mechanical ventilation with heat recovery for the renovation of a small residential house from 1954

galdreth•26 Oct 2019 17:48

Answers: 0

galdreth • 26 Oct 2019 17:48

Rebate Ventilation or Controlled Ventilation?

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Heidi1965•13 Sep 2019 16:31

Answers: 25

RFR • 24 Oct 2019 07:32

bluMartin Ventilation System – Experiences? / Questions

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Hausbau2016LE•31 Jul 2015 07:19

Answers: 8

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bluMartin GmbH • 10 Oct 2019 18:09