help with new bathroom and towel radiator
having a big renovation of the house so getting a heat pump in at the same time, but ive got a problem room. weve created a new bath/util room with a dedicated plant room within it for the HW tank etc. the ceiling is insulated the floor is insulated the walls on both sides are insulated. the other 2 walls are thermal type blocks. whole room is dot and dabbed. tiny double glazed window 400x800. heat loss for the whole area is 593W for just the actual area that is the bath/util its about 492W. im struggling to find a stainless steel towel rad that will fit in the 550Wx2300H wall that can manage much more than 250W at the 40c design flow. dont want to use underfloor and floors tiled now anyway. dont want to use normal rads if possible as they tend to rust. the main flow and return 28mm's to the house are running in the ceiling void so might help with some heat into the room?
ideas?
Can you include the heat loss from the plant in the calculations, as these may help you meet the heat loss for the room? A DHW tank can lose (emit) 100W per hour, and a volumiser 50W, not to mention uninsulated pipework.
Posted by: @adamkhaving a big renovation of the house so getting a heat pump in at the same time, but ive got a problem room. weve created a new bath/util room with a dedicated plant room within it for the HW tank etc. the ceiling is insulated the floor is insulated the walls on both sides are insulated. the other 2 walls are thermal type blocks. whole room is dot and dabbed. tiny double glazed window 400x800. heat loss for the whole area is 593W for just the actual area that is the bath/util its about 492W. im struggling to find a stainless steel towel rad that will fit in the 550Wx2300H wall that can manage much more than 250W at the 40c design flow. dont want to use underfloor and floors tiled now anyway. dont want to use normal rads if possible as they tend to rust. the main flow and return 28mm's to the house are running in the ceiling void so might help with some heat into the room?
ideas?
I persuaded my installer that heat loss from the adjacent hallway plus steam when you actually take a bath/shower was sufficient (in order that we didn't have to replace an existing towel rail). In practice its true!
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
- 21 Forums
- 1,977 Topics
- 43.1 K Posts
- 31 Online
- 2,305 Members
Join Us!
Heat Pump Dramas?
Thinking about installing a heat pump but unsure where to start? Already have one but it’s not performing as expected? Or are you locked in a frustrating dispute with an installer or manufacturer? We’re here to help.
✅ Pre-Installation Planning
✅ Post-Installation Troubleshooting
✅ Performance Optimisation
✅ Complaint Support (Manufacturer & Installer)
Latest Posts
-
You’ve got 16 loops looking at your flows, there is r...
By davidnolan22 , 6 seconds ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@abernyte no, it doesn’t turn the pumps off on mine.
By davidnolan22 , 52 minutes ago
-
RE: Confused about Samsung Gen6 Hot Water Controller
Do you have the DHW on timed periods or on continuous w...
By DerekDeLeon , 10 hours ago
-
RE: What is the best strategy for operating a very oversized heat pump?
I think we are currently operating a weird mix of 2 and...
By guthrie , 12 hours ago
-
We’ve had our heat pump (EBAC) since October, with a fe...
By Simon and Zoe , 14 hours ago
-
RE: DHW temp Samsung AE120RXYDEG 12kw ASHP with Gen 6 controller
@Bami Ive had a look for the specs of your cylinder o...
By bontwoody , 14 hours ago
-
RE: best approach for primaries?
Personally I would want them inside the heated envelope...
By JamesPa , 17 hours ago
-
RE: help with new bathroom and towel radiator
I persuaded my installer that heat loss from the adjace...
By JamesPa , 17 hours ago
-
RE: Grant Aerona fine tuning advice needed
Thank you pretty sure it's solar gain causing the incre...
By Stopbar , 18 hours ago
-
-
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
I fitted a Samsung 8kw myself on a new build with under...
By DerekDeLeon , 21 hours ago
-
RE: Who's your electricity provider and what's your tariff?
@adrian it does look like they’ve updated their outgoin...
By Arundalep , 2 days ago
-
RE: Heat Pump Sizing & Installation Costs
1970s 4-bed detached house approx 168 sq.m internal are...
By JohnR , 2 days ago
-
RE: Is it KISS or constant – weather compensation vs. set flow temperature?
Away at present. Hence the delay. Will get back asap. ...
By cliffhanger , 2 days ago
-
RE: Setback savings - fact or fiction?
The lower the DT the higher the flow rate. The lower ...
By BobTSkutter , 3 days ago
-
RE: New kitchen with no walls – will fan coil units work?
Thanks. That explains the strangely-shaped 'feet' (loo...
By IanMK13 , 3 days ago
-
RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
I’ve updated Bodge Buster for 2025 to empower homeowner...
By Mars , 3 days ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
Aira, the Swedish, end to end manufacturer, system desi...
By KevinPotts , 3 days ago
-
Unfortunately for your argument the best performing Dai...
By RobS , 4 days ago
-
RE: Grant ASHP not reaching target temperatures
@mikefl Thank you. I’m not sure how to do these checks ...
By Hillswick , 4 days ago
Latest Topics
-
Confused about Samsung Gen6 Hot Water Controller
By ntruby 11 hours ago
-
help with new bathroom and towel radiator
By AdamK 21 hours ago
-
Grant Aerona fine tuning advice needed
By Stopbar 2 days ago
-
Adjusting 6kW Daikin's Weather Compensation Curve
By Ubert767 5 days ago
-
Should I make my radiators smaller?
By Scalextrix 6 days ago