ᐅ Heating / HVAC

Learn how to choose the optimal heating and cooling systems for your home – ensuring comfortable temperatures and greater energy efficiency in everyday living!

Underfloor heating and heat pumps. I thought I had it all figured out.

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Stefan001•10 Nov 2021 19:52

Answers: 15

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driver55 • 12 Nov 2021 13:34

Heat contracting for two rental apartments in a new building?

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RheinAstrid•10 Nov 2021 07:50

Answers: 5

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Benutzer200 • 10 Nov 2021 17:18

Is installing underfloor heating in the basement worthwhile?

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Pacc666•6 Oct 2021 08:10

Answers: 60

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Deliverer • 10 Nov 2021 08:45

Is it possible to build a panoramic fireplace for under €6,000?

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SamSamSam•13 Sep 2021 17:58

Answers: 29

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HarvSpec • 9 Nov 2021 14:47

Maintenance costs Vaillant Therm Plus VWL 75/6 A - Is the height acceptable?

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Mr.Boing•3 Aug 2021 23:21

Answers: 20

Mahri23 • 9 Nov 2021 10:07

District heat transfer station, high energy consumption

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Fingerhut•8 Nov 2021 14:19

Answers: 1

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MayrCh • 8 Nov 2021 22:23

New Single-Family Home Construction – Gas or Air Source Heat Pump + Photovoltaic System + Energy Storage?

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nullhorn•25 Apr 2021 14:18

Answers: 168

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Benutzer200 • 7 Nov 2021 20:24

Which infrared heater is suitable for a yoga room?

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Snowy36•3 Nov 2021 18:37

Answers: 4

Nida35a • 6 Nov 2021 17:46

Air-to-water heat pump, central ventilation system, and water storage combined into a single compact unit?

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HoisleBauer22•28 Oct 2021 00:58

Answers: 0

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HoisleBauer22 • 28 Oct 2021 00:58

Recommended Indoor Climate Monitor

Tolentino•26 Oct 2021 10:46

Answers: 15

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hampshire • 26 Oct 2021 17:35

Roth heat pump new build rooms too warm

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Kieder88•25 Oct 2021 14:31

Answers: 1

Mycraft • 25 Oct 2021 15:30

Manufacturer Recommendation: Air-to-Water Heat Pump + Central Ventilation System

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Seb_Opf•18 Oct 2021 14:54

Answers: 14

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Seb_Opf • 21 Oct 2021 17:57

Experiences with Mini Combined Heat and Power Plants (CHP)?

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konibar•19 Oct 2021 17:15

Answers: 2

i_b_n_a_n • 19 Oct 2021 19:18

Actuators open but no flow

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Malz1902•10 Oct 2021 19:13

Answers: 13

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Malz1902 • 11 Oct 2021 19:18

Juncker gas boiler shuts off after ignition

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Thomas1997•8 Oct 2021 20:52

Answers: 5

HausiKlausi • 9 Oct 2021 23:54

Air-to-water heat pump combined with underfloor heating is not functioning properly

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_Ugeen_•22 Sep 2021 15:34

Answers: 65

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Daniel-Sp • 8 Oct 2021 19:33

Pellet Boiler Correct Boiler Size: 20 kW or 25 kW?

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Deniz85•2 Oct 2021 09:53

Answers: 14

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driver55 • 8 Oct 2021 16:01

Strawa Regolux Flow Indicator / Flow Controller / Flow Meter

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Malz1902•8 Oct 2021 15:34

Answers: 0

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Malz1902 • 8 Oct 2021 15:34

Experience with Bivalent Heat Pump Heating System

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konibar•8 Oct 2021 09:28

Answers: 2

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guckuck2 • 8 Oct 2021 10:38

Insulation for heat pump pipes (what thickness?)

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Andre77•6 Oct 2021 11:41

Answers: 1

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Lumpi_LE • 6 Oct 2021 13:12

Is this the correct way to start up wall-mounted radiators?

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Grot85•5 Oct 2021 08:01

Answers: 1

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Gartenfreund • 6 Oct 2021 08:08

Price Differences of Infrared Panels

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flotschi007•20 Sep 2021 11:09

Answers: 9

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Oetzberger • 3 Oct 2021 15:27

Heating System Maintenance Contract – What Is a Reasonable Cost?

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Stefan2.84•16 Sep 2021 15:19

Answers: 27

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Traumfaenger • 2 Oct 2021 22:26

Heat Pump Outdoor Unit Installed Correctly?

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BananaJoe•11 Sep 2021 20:35

Answers: 9

Mahri23 • 27 Sep 2021 10:11

Gas fireplace stove without heating function – model/manufacturer required for building permit/planning permission before construction?

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Pinkiponk•15 Sep 2021 13:32

Answers: 9

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Georgian2019 • 24 Sep 2021 09:04

What type of wood stove is this?

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ashley•23 Sep 2021 11:11

Answers: 1

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driver55 • 23 Sep 2021 19:33

Supplementary Heating for Our Bathroom – Which Type? Any Experiences?

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krischaaan•29 Aug 2021 20:08

Answers: 11

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hampshire • 22 Sep 2021 10:06

Air source heat pump with a central ventilation system

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Andi3579•12 Sep 2021 22:07

Answers: 18

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micric3 • 21 Sep 2021 13:30

Experiences with infrared under-plaster heating for bathroom walls or ceilings?

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JamaikaJoe•12 Sep 2021 22:17

Answers: 0

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JamaikaJoe • 12 Sep 2021 22:17

Ground source heat pump, does anyone have advice?

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Jacy0505•10 Sep 2021 19:18

Answers: 8

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HausTmMike • 11 Sep 2021 21:31

Ground Source Heat Pump – How Noisy Is the Unit?

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Egon der 3.•29 Aug 2021 00:03

Answers: 3

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hampshire • 29 Aug 2021 17:17

Radiators in the garage – no car inside

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mitternachtssp•26 Aug 2021 16:16

Answers: 3

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hampshire • 26 Aug 2021 16:31

Cooling with a heat pump through underfloor heating?

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Markus254•23 Apr 2021 11:50

Answers: 117

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tumaa • 24 Aug 2021 13:29

Hot water set to 60°C due to risk of Legionella bacteria

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Pädda•29 Jul 2021 08:28

Answers: 12

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4lpha0ne • 20 Aug 2021 11:23

Shared heat pump – semi-detached house

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Jogidude•5 Aug 2021 20:25

Answers: 10

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konibar • 13 Aug 2021 00:19

Is it possible to install air conditioning as an upgrade if a mechanical ventilation system with heat recovery is already installed?

McEgg•8 Aug 2021 07:32

Answers: 32

K1300S • 10 Aug 2021 21:30

Costs for a Central Air Conditioning System in New Construction

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silentser•27 Jul 2021 15:56

Answers: 32

rick2018 • 7 Aug 2021 19:10

Is it allowed to install a condensing boiler on drywall (gypsum board)?

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Olli-Ka•23 May 2021 07:22

Answers: 3

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Olli-Ka • 7 Aug 2021 11:53

Active vs. Passive Air-to-Water Heat Pumps: Differences in Cooling

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Dany250•6 Aug 2021 08:44

Answers: 18

Hangman • 6 Aug 2021 14:12

Is it possible to install a gas condensing boiler that meets the KfW 55 energy efficiency standard?

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Johnny007•25 Jul 2021 21:12

Answers: 21

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Snowy36 • 30 Jul 2021 13:50

Alternative heat pump to the Vitocal 200-S (eligible for government subsidy)?

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Markus254•28 Jul 2021 14:46

Answers: 3

hausnrplus25 • 28 Jul 2021 18:32

Planning a KfW55 semi-detached house with a Tecalor THZ air-to-air heat pump—how to implement cooling?

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Charlieparker•26 Jul 2021 22:13

Answers: 1

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Daniel-Sp • 27 Jul 2021 06:40

Multi-utility supply line – Can the gas connection be used for the air conditioning system?

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Reltaw2021•20 Jul 2021 17:00

Answers: 17

K1300S • 21 Jul 2021 18:12

Is It Worth Installing a Decentralized Ventilation System?

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Pacc666•20 Jul 2021 13:35

Answers: 13

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nordanney • 21 Jul 2021 09:01

Gas line installation in progress – currently using an oil heating system

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AnderTaker•15 Jul 2021 15:30

Answers: 9

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Grundaus • 20 Jul 2021 10:18

Wastewater from the downpipe to the house connection: reliably leak-proof?

Parcels•19 Jul 2021 12:08

Answers: 4

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Strahleman • 19 Jul 2021 22:37

Underfloor Heating and Air-to-Water Heat Pump in New Construction: Am I Inviting Problems?

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neo-sciliar•16 Jul 2021 18:03

Answers: 28

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nordanney • 17 Jul 2021 23:20

Refurbish or Replace Radiators?

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Kristina_:)•13 Jul 2021 13:04

Answers: 9

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nordanney • 13 Jul 2021 23:20

Heat Pump Zewotherm / Fujitsu Waterstage, Question About Current Status

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Malz1902•12 Jul 2021 11:08

Answers: 1

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Malz1902 • 12 Jul 2021 11:27

Building to the Energy Saving Ordinance 2016 or to KfW55 standards

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Raiweired•16 Jun 2021 13:08

Answers: 43

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hampshire • 9 Jul 2021 14:17

Retrofitting an air conditioning system – will that affect KfW funding?

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Helado•10 Jun 2021 21:02

Answers: 82

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pagoni2020 • 8 Jul 2021 23:16

Gas boiler in the attic. What are the structural considerations?

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IrmgardWild•29 Jun 2021 21:43

Answers: 0

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IrmgardWild • 29 Jun 2021 21:43

Cooling Concept for New Construction – Split Air Conditioning / Air-to-Water Heat Pump Cooling Function / Combination

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Samantheus•20 Jun 2021 11:49

Answers: 25

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JoachimG. • 29 Jun 2021 20:45

Dimplex SI8TU Ground Source Heat Pump – Unusual Behavior

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Fuchur•20 May 2021 17:32

Answers: 15

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Fuchur • 25 Jun 2021 15:56

Manufacturer of underfloor heating dry system

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Philipp112•23 Jun 2021 10:06

Answers: 6

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nordanney • 24 Jun 2021 13:35

Groundwater / Ground Source and Air-to-Water System Requirements Set by the Development Area

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AzudemB•23 Jun 2021 07:50

Answers: 10

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AzudemB • 23 Jun 2021 19:15

Noticeable cooling effect with air-to-water heat pump

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_Ugeen_•19 Jun 2021 13:10

Answers: 22

berny • 20 Jun 2021 19:36

Air-to-air heat pump in a KfW 40+ house – Switching to a ground-source heat pump just before the building permit application?

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Possmann•3 Apr 2021 12:27

Answers: 9

maxx004 • 20 Jun 2021 12:33

Legal Amendment Supporting Cooling Systems – Any Experiences?

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Reltaw2021•16 Jun 2021 13:23

Answers: 13

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Reltaw2021 • 17 Jun 2021 14:27

Is a Separate Meter and Electricity Tariff for an Air-to-Water Heat Pump Beneficial?

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_Ugeen_•2 Jun 2021 08:47

Answers: 103

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guckuck2 • 14 Jun 2021 16:22

How much does a good new heat pump typically cost? Looking for experiences and insights!

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trx_type•23 Feb 2021 09:57

Answers: 58

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nordanney • 11 Jun 2021 10:12

Placement of the ventilation system, installation of air intake and outlet vents

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Iceman888•10 Jun 2021 10:31

Answers: 0

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Iceman888 • 10 Jun 2021 10:31

Are the controllers for underfloor heating control valves "installed incorrectly"?

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quattro123•8 Jun 2021 17:04

Answers: 10

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quattro123 • 9 Jun 2021 08:23

Installation of Heat Pump/Heating System – Before or After the Screed?

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Mudo1991•7 Jun 2021 08:37

Answers: 16

i_b_n_a_n • 7 Jun 2021 21:09

Inside the house is 10°C warmer than outside – how is that possible?

kati1337•5 Jun 2021 17:44

Answers: 40

KingJulien • 6 Jun 2021 20:18

Getting an air-to-water heat pump to operate at 24 degrees Celsius outdoor temperature

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Tx-25•2 Jun 2021 21:10

Answers: 1

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nordanney • 2 Jun 2021 23:33

Local heating network or air-to-water heat pump?

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Fips0001•1 Jun 2021 12:06

Answers: 11

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Deliverer • 1 Jun 2021 15:29

Flow sensor of the air-source heat pump malfunctioning

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Uwe Müller•1 Jun 2021 05:27

Answers: 1

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HilfeHilfe • 1 Jun 2021 06:22

How much buffer tank capacity is necessary?

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Bullerbü2020•24 May 2021 15:04

Answers: 8

Mycraft • 26 May 2021 17:01

A new gas line installation in Berlin costs €5,000.

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etrox111•23 May 2021 15:43

Answers: 20

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apokolok • 25 May 2021 21:59

Ground connection for brine-to-water heat pump with multiple service lines?

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Stephan—•23 May 2021 18:31

Answers: 7

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hanghaus2000 • 24 May 2021 09:16

Air-to-water heat pump + controlled indoor ventilation system (central ventilation unit)

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exto1791•3 Nov 2020 19:20

Answers: 26

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Snowy36 • 23 May 2021 23:09

KfW 55: Choosing the Heating System – Gas vs. Air-to-Water Heat Pump

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Gerddieter•21 May 2021 18:29

Answers: 17

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Bookstar • 22 May 2021 11:12

Location of the air-to-water heat pump outdoor unit

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Hausner•22 May 2021 03:33

Answers: 0

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Hausner • 22 May 2021 03:33

Routing for underfloor heating when there is already an existing partially installed system

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BauBauNRW•20 May 2021 21:40

Answers: 0

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BauBauNRW • 20 May 2021 21:40

Is it possible to optimize the heating system after performing hydraulic balancing?

kati1337•13 May 2021 15:19

Answers: 9

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Deliverer • 20 May 2021 12:29

Experiences with Ground Source Heat Pumps

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Saruss•23 Oct 2015 21:40

Answers: 491

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annab377 • 19 May 2021 07:23

New Heating System for an Old Farmhouse! Gas vs. Gas with Heat Pump vs. Heat Pump Only

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smhs2021•13 May 2021 12:21

Answers: 6

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nordanney • 13 May 2021 19:16

New Construction – Uneven Underfloor Heating (Vaillant Aurocompact)

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MaxMustaman92•6 May 2021 18:24

Answers: 12

Mycraft • 8 May 2021 07:38

Retrofitting Underfloor Heating: District Heating or Electric?

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Axel900•6 May 2021 19:05

Answers: 9

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nordanney • 7 May 2021 20:14

Should a shed (20 m²) be equipped with heating?

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Fragenasker•20 Mar 2021 04:29

Answers: 10

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HilfeHilfe • 6 May 2021 05:51

New Construction System Check KfW55 – Remko Heat Pump / 500L Buffer Tank / Domestic Hot Water Module

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marceleisi•5 May 2021 20:31

Answers: 1

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Daniel-Sp • 5 May 2021 20:57

Experience with Old Heating System Piping

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Träumerle•30 Apr 2021 09:10

Answers: 15

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T_im_Norden • 4 May 2021 15:18

Air-to-Water Heat Pump in a KfW55 Energy Standard House / Heating Load, Standards?

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chamäleon•2 May 2021 23:33

Answers: 13

tomtom79 • 3 May 2021 11:40

Existing House: Heating System Modernization

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Marburg87•29 Apr 2021 02:21

Answers: 4

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pagoni2020 • 29 Apr 2021 10:35

Heating System Replacement in an Existing Property Built in 1993 – Evaluation of Quotes

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myDoering•19 Apr 2021 13:27

Answers: 8

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nordanney • 19 Apr 2021 16:36

Comparison of Groundwater, Ground Source, and Air Source Heat Pumps

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sub-xero•17 Apr 2021 15:38

Answers: 27

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pagoni2020 • 19 Apr 2021 16:02

Pellet-Solar Combination – Issues During Summer?

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XxTankerxX•15 Apr 2021 14:41

Answers: 18

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Bertram100 • 16 Apr 2021 16:12

Recommendation for Wireless Thermostat for Underfloor Heating

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TiSa1920•12 Apr 2021 21:47

Answers: 2

Mycraft • 13 Apr 2021 08:51

New Construction with a Granny Flat – Heating System and KfW Financing Questions

derBensch•10 Apr 2021 23:07

Answers: 6

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nordanney • 12 Apr 2021 07:23

Ground source heat pump for a small single-story detached house

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blackarrow1990•2 Apr 2021 14:06

Answers: 15

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blackarrow1990 • 10 Apr 2021 12:32

Timer for circulation pump at the heating system

chewbacca123•6 Apr 2021 09:11

Answers: 29

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Martial.white • 9 Apr 2021 12:09

Sizing of Our Air-to-Water Heat Pump for a KfW55 New Build Semi-Detached House, 120 sqm

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Stammheimer•5 Apr 2021 22:40

Answers: 4

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Daniel-Sp • 6 Apr 2021 09:58

Which type of heating system is best for a new build?

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theundertaker•30 Mar 2021 17:34

Answers: 12

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Nordlys • 30 Mar 2021 21:56

Basement underfloor heating or low-temperature radiators

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Pwnage619•4 Mar 2021 11:11

Answers: 22

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T_im_Norden • 20 Mar 2021 13:08

Combine an air-to-water heat pump with a wood-burning stove connected to the central heating system

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GSGaucho•29 Mar 2020 14:13

Answers: 57

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T_im_Norden • 19 Mar 2021 15:24

Experiences with brine heat pumps from IDM?

DASI90•10 Feb 2021 13:42

Answers: 18

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T_im_Norden • 16 Mar 2021 12:00

Mechanical ventilation with heat recovery tends to get dirty and develop mold over time.

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schnuffy1de•9 Mar 2021 19:12

Answers: 4

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schnuffy1de • 10 Mar 2021 18:42

Change When Relocating Underfloor Heating

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Viktoria•10 Mar 2021 13:02

Answers: 3

11ant • 10 Mar 2021 14:20

How to Insulate Underfloor Heating Supply Pipes (Preventing Overheating of the Room)

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annab377•8 Mar 2021 20:26

Answers: 5

bauenmk2020 • 9 Mar 2021 12:59