Forums

Notifications

Clear all

AdamK

@adamk

Member

Honorable Member

Joined: Feb 23, 2025
Last seen: Jan 12, 2026

Topics: 26 / Replies: 172

AllTopicsReplies

RE: help sizing rads based on room by room heat loss

@jamespa so if i have a 1988w rad at 40c @-3.1 it will only be 509w?

9 months ago

Forum

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

RE: help sizing rads based on room by room heat loss

@jamespa heat loss list on first post. it’s the one that says nearly 2kw, I’ve just split it into 2 rooms as we’re going to put a sliding wall betwe...

9 months ago

Forum

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

RE: help sizing rads based on room by room heat loss

@jamespa thanks for the info but I think I must have something wrong. The heat loss for the whole house is about 7.5kw. The room is only 3.756m x 3.68...

9 months ago

Forum

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

RE: help sizing rads based on room by room heat loss

can i ask then if i have a heat loss for a room of 1079w and a flow of 40c@-3.1c what wattage rad do i need to hit? cause at the moment im struggling ...

9 months ago

Forum

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

RE: Help me keep the faith with my air source heat pump installation

@jamespa what I didn’t want to do was oversize too much then end up having the HP cycling. What I have noticed is most companies I’ve contacted want t...

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Help me keep the faith with my air source heat pump installation

@jamespa I’ve had a few done most come out around 7kw so that’s probably about right, but the loss per room I’ve only got one and it’s been corrected ...

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Help me keep the faith with my air source heat pump installation

@jamespa I’m planning to try for 40c as that’s what my old installer was going to do. I will measure the rads and see where I need to upgrade. One of ...

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Help me keep the faith with my air source heat pump installation

tf heating and plumbing Visited today. They are suggesting a 2 port buffer/volumiser. Also said the rads would needs to be upgraded if needed otherwis...

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Help me keep the faith with my air source heat pump installation

the training is not happening at any pace. they have a whole room with HP's of different brands in at my local college but no one to teach it, the gas...

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Vaillant water pressure gauge vs Analogue gauge

just wondering if the UFH is creating some back pressure and the rad locksheilds are closed down too much so when the pump kicks in its pumping agains...

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Help me keep the faith with my air source heat pump installation

now have 3 companies in line to quote that were on the Vaillant site as covering my area. think the nearest is 20 miles away.

9 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Help me keep the faith with my air source heat pump installation

been looking at companies local to me and two have Vaillant master tech status and one renewable partner. which is the better company?

9 months ago

Forum