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u/Ok_Brother777

r/ukheatpumps r/heatpumps r/askplumbing r/AskElectricians
Image 1 — Heatpump installed - condensate drain
Image 2 — Heatpump installed - condensate drain
Image 3 — Heatpump installed - condensate drain
Image 4 — Heatpump installed - condensate drain
Image 5 — Heatpump installed - condensate drain
▲ 9 r/ukheatpumps

Heatpump installed - condensate drain

Hi,

Got my heatpump installed this week. It was a bit of an adventure. It was suppose to be a two man team, but it was one. Ended up carrying the radiators on the first day as delivery arrived and they were not here. Helped him with some of the installs as they were heavy for one person, but that I don't mind as long as the job is finished well. Not quite finished as one radiator could not be installed as he was missing some parts last night. Installer is going to return next week to do it. The other radiators are connected and filled. Question about condensate drain. I could not see it last night, asked him and he said it would drip underneath, as I have paving slabs and there is no need for one. The installation notes said the installer would build a soakaway, but he said it is not needed as it is sitting on paving slabs. Is that correct or is it going to create a puddle mess in the winter and make the decking rot quicker etc? Can I I connect a hose to it? Also the unit has not been anchored down with bots. I was told it does not need to be at it is very heavy - Vaillant 10kw plus. Is that correct? The pipes connected from the unit are bolted to the wall. Any thoughts and advise would be appreciated.

Thank you.

u/Ok_Brother777 — 5 days ago
▲ 2 r/AskElectricians

Heat Pump Electrician

Heat pump electrician

I am having my heat pump installed and today an electrician attended to connect the pump and add a fusebox. He arrived 3 hours late and stayed over until now to finish the work, although the plumber finished 4 hours ago for the day.

I just want your thoughts if this is good work and I am happy to be educated as I have no idea. I bought the house 3 years agom the cabling inside the house is about 10- 15 years old, but the fuse box is old and they knew that from my initial pictures. From the start he said that he was worried that it is this type of box as it is almost impossible to drill through and there is no space for the additional circuit box. I showed him that he can remove a very old light temporizer to make some room for the cabling and asked if he can install the new circuit board above the fusebox or in the cupboard adjacent to it. For the above option he said no as the cabling would look horrible to reach the heatpup through. For the cupboard he said the walls would be at an angle from the fusebox so it will be nightmare to drill through so in the end I agreed for him to place it in the garage which will be converted in 1 year. I thought he would place it higher up as I was hoping to put a sofa there. I did not hover so this is the finished work. I asked if the cabling should be covered as someone could step on it when entering through the garage door. He said no as it is armoured and this you can even bury it in cement when doing the floor for the garage. I won't do that... Anyway I would appreciate an electrician thoughts on this. The guy was nice and polite and probably this is good work. I just want to know if should cover the cabling somehow, or if my idea to place the fuse box in the cupboard would have been better. Appreciate any professional thoughts on this.

Kind Regards

u/Ok_Brother777 — 8 days ago
▲ 0 r/askplumbing

Hypotetical question...plumber

If a plumber wants to connect one of the pipes through under the staircase to install a new radiator and you inform him that you think that the inside of the staircase might have a board of asbestos and he says it's fine because he is avoiding that area (although I am not sure how he can avoid it) as I told him it's best to go through the wall and along the staircase on the outside, but he says it would look ugly and he does not like to leave work that is unplesant to the eye. I told him that my concern is for him. Where does my responsability sit? I never tested it but I am pretty sure and morally I don't want anyone to suffer. Should I let him damp the area and put the pipe through or insist that he routes it through the outside of the staircase (it will look ugly, he is right about that but don't want to risk anyone's life...I also believe that such a small exposure may not be such a big deal...basing that on the old lady that had the house for 60 years before me and had other issues but nothing related to this)... hypothetical question.

reddit.com
u/Ok_Brother777 — 10 days ago
▲ 0 r/ukheatpumps

Waiting install of Vaillant plus 10kW (2026 model)

I was initially quoted for an installation of a Vaillant plus 7kW (2026 model) for a mid-terrace townhouse - 95 m2 as they did not include the garage. The initial heatloss report indicated a hewt loss 6.85 kW heatloss (average load of 72 W/m2). The design is done on a flowrate of 49 degrees C at a targeted temperature of -0.8 degrees C. All 10 radiators are getting replaced at my request and they will install a 250 litres hot water tank.

However because I told the design team during follow up that I intend to do a garage conversion in about 2 years to a living space this would increase the living space to 120 m2 and heatloss to 7.52 kW so they suggested the Vaillant plus 10 kW (2026 model) and I can see in the quotation that they added a 50 l buffer vessel (maybe as a temporary option until I do the extension to the garage?). Any thoughts if I should have stayed with the 7kW option as it would have kept the system open loop I think, but then I was worried it would have struggled in cold snaps. Would a voluminiser been a better option than the buffer vessell? It's worth mentioning that the garden backs into a forest/park and although I am located in West Sussex, due to the open space, the temperature has dropped to -3 and -5 degrees C in the past winters ( in the middle of the night).

Worth mentioning that the difference in upfront cost betwen the the two units and install is only about £1400.

The pipes leading to the radiators are 15mm. Here are the sizes of the new radiators

(P+) radiator · White 600 x 1600 mm - 2.2 l per min flow rate

Second Bedroom × 1

(P+) radiator · White 700 x 1400 mm

Hall/Landing × 1

(K2) radiator · White 450 x 2000 mm

Living/Lounge × 1

(K2) radiator· White 700 x 900 mm

Utility × 1

(P2) radiator · White 1800 x 700 mm

Bath/Shower × 1

(K2) radiator · White 1800 x 500 mm

Kitchen × 1

(P+) radiator · White 600 x 1600 mm

First Bedroom × 1

(K2) radiator · White 450 x 2000 mm

Living/Lounge × 1

(K2) radiator · White 600 x 1000 mm

Third Bedroom × 1

(K2) radiator · White 700 x 600 mm

Hall/Landing × 1

Other details:

Whole home permeability

At 50Pa

11.4 m³/hr/m²

At normal conditions

0.57 m³/hr/m²

This figure is estimated based on the following contribution from each part of the property (each at 50 Pa, in m³/hr/m²):

Structural Masonry + 7.0

Floor Sealed + 0.0

Doors & windows 75% draught-proofed + 3.0

Storeys 3 storeys + 1.4

Total = 11.4

Calculation factors

Shielding

How exposed the property is to the wind. Sheltered locations lose less heat through ventilation than exposed ones.

Normal

Zone height

The building’s total height across all floors is about 10 m.

Any constructive advice or thoughts would be greatly appreciated in terms of what I should be mindful off.

Thank you!

reddit.com
u/Ok_Brother777 — 14 days ago
▲ 1 r/ukheatpumps

Waiting install of Vaillant plus 10kW (2026 model)

I was initially quoted for an installation of a Vaillant plus 7kW (2026 model) for a mid-terrace townhouse - 95 m2 as they did not include the garage. The initial heatloss report indicated a hewt loss 6.85 kW heatloss (average load of 72 W/m2). The design is done on a flowrate of 49 degrees C at a targeted temperature of -0.8 degrees C. All 10 radiators are getting replaced at my request and they will install a 250 litres hot water tank.

However because I told the design team during follow up that I intend to do a garage conversion in about 2 years to a living space this would increase the living space to 120 m2 and heatloss to 7.52 kW so they suggested the Vaillant plus 10 kW (2026 model) and I can see in the quotation that they added a 50 l buffer vessel (maybe as a temporary option until I do the extension to the garage?). Any thoughts if I should have stayed with the 7kW option as it would have kept the system open loop I think, but then I was worried it would have struggled in cold snaps. Would a voluminiser been a better option than the buffer vessell? It's worth mentioning that the garden backs into a forest/park and although I am located in West Sussex, due to the open space, the temperature has dropped to -3 and -5 degrees C in the past winters ( in the middle of the night).

Worth mentioning that the difference in upfront cost betwen the the two units and install is only about £1400.

The pipes leading to the radiators are 15mm. Here are the sizes of the new radiators

(P+) radiator · White 600 x 1600 mm - 2.2 l per min flow rate

Second Bedroom × 1

(P+) radiator · White 700 x 1400 mm

Hall/Landing × 1

(K2) radiator · White 450 x 2000 mm

Living/Lounge × 1

(K2) radiator· White 700 x 900 mm

Utility × 1

(P2) radiator · White 1800 x 700 mm

Bath/Shower × 1

(K2) radiator · White 1800 x 500 mm

Kitchen × 1

(P+) radiator · White 600 x 1600 mm

First Bedroom × 1

(K2) radiator · White 450 x 2000 mm

Living/Lounge × 1

(K2) radiator · White 600 x 1000 mm

Third Bedroom × 1

(K2) radiator · White 700 x 600 mm

Hall/Landing × 1

Other details:

Whole home permeability

At 50Pa

11.4 m³/hr/m²

At normal conditions

0.57 m³/hr/m²

This figure is estimated based on the following contribution from each part of the property (each at 50 Pa, in m³/hr/m²):

Structural Masonry + 7.0

Floor Sealed + 0.0

Doors & windows 75% draught-proofed + 3.0

Storeys 3 storeys + 1.4

Total = 11.4

Calculation factors

Shielding

How exposed the property is to the wind. Sheltered locations lose less heat through ventilation than exposed ones.

Normal

Zone height

The building’s total height across all floors is about 10 m.

Any constructive advice or thoughts would be greatly appreciated in terms of what I should be mindful off.

Thank you!

reddit.com
u/Ok_Brother777 — 15 days ago
▲ 4 r/ukheatpumps+1 crossposts

Waiting install of Vaillant plus 10kW (2026 model)

I was initially quoted for an installation of a Vaillant plus 7kW (2026 model) for a mid-terrace townhouse - 95 m2 as they did not include the garage. The initial heatloss report indicated a hewt loss 6.85 kW heatloss (average load of 72 W/m2). The design is done on a flowrate of 49 degrees C at a targeted temperature of -0.8 degrees C. All 10 radiators are getting replaced at my request and they will install a 250 litres hot water tank.

However because I told the design team during follow up that I intend to do a garage conversion in about 2 years to a living space this would increase the living space to 120 m2 and heatloss to 7.52 kW so they suggested the Vaillant plus 10 kW (2026 model) and I can see in the quotation that they added a 50 l buffer vessel (maybe as a temporary option until I do the extension to the garage?). Any thoughts if I should have stayed with the 7kW option as it would have kept the system open loop I think, but then I was worried it would have struggled in cold snaps. Would a voluminiser been a better option than the buffer vessell? It's worth mentioning that the garden backs into a forest/park and although I am located in West Sussex, due to the open space, the temperature has dropped to -3 and -5 degrees C in the past winters ( in the middle of the night).

Worth mentioning that the difference in upfront cost betwen the the two units and install is only about £1400.

The pipes leading to the radiators are 15mm. Here are the sizes of the new radiators

(P+) radiator · White 600 x 1600 mm - 2.2 l per min flow rate

Second Bedroom × 1

(P+) radiator · White 700 x 1400 mm

Hall/Landing × 1

(K2) radiator · White 450 x 2000 mm

Living/Lounge × 1

(K2) radiator· White 700 x 900 mm

Utility × 1

(P2) radiator · White 1800 x 700 mm

Bath/Shower × 1

(K2) radiator · White 1800 x 500 mm

Kitchen × 1

(P+) radiator · White 600 x 1600 mm

First Bedroom × 1

(K2) radiator · White 450 x 2000 mm

Living/Lounge × 1

(K2) radiator · White 600 x 1000 mm

Third Bedroom × 1

(K2) radiator · White 700 x 600 mm

Hall/Landing × 1

Other details:

Whole home permeability

At 50Pa

11.4 m³/hr/m²

At normal conditions

0.57 m³/hr/m²

This figure is estimated based on the following contribution from each part of the property (each at 50 Pa, in m³/hr/m²):

Structural Masonry + 7.0

Floor Sealed + 0.0

Doors & windows 75% draught-proofed + 3.0

Storeys 3 storeys + 1.4

Total = 11.4

Calculation factors

Shielding

How exposed the property is to the wind. Sheltered locations lose less heat through ventilation than exposed ones.

Normal

Zone height

The building’s total height across all floors is about 10 m.

Any constructive advice or thoughts would be greatly appreciated in terms of what I should be mindful off.

Thank you!

reddit.com
u/Ok_Brother777 — 16 days ago