Visual Install Guide
A clean, repeatable method for adding skirting-level emitters to existing radiator circuits — quicker installs, fewer call-backs, happier customers.
How to Fit Add2Rad
A fast, low-disruption method for extending emitter area and reliably hitting low flow temperatures.
Download the site checklist (optional) →
🧰 Tools & Materials
Tools: pipe cutter, deburrer, spanners, microbore adapters (if needed), drill/driver, spirit level, mastic/adhesive, wipes, PTFE, clip set.
Materials: Add2Rad profiles (cut lengths), internal/external corners, joins, end caps, tails/tees, fixings & clips, sealant, touch-up paint.
⚙️ Connection Overview
- Isolate radiator (close TRV & lockshield).
- Break into tails using a T or diverter to feed Add2Rad loop.
- Run Add2Rad profiles along chosen walls (3–6 m typical per room).
- Balance & commission (bleed if needed, check flow/return delta).
Target: deliver up to ~90 W/m additional output at design temp.
🧱 Mounting Profiles (Clean Finish)
- Mark line with level (keep consistent datum).
- Fix clips at manufacturer spacing (typically 400–600 mm).
- Dry-fit corners and check lengths before final push-fit.
- Seal discreetly along top edge if required by finish spec.
- Re-fit trims and wipe down.
🔁 Plumbing Method (Tails & Balance)
- T-in at radiator tails → flow into Add2Rad → return to rad.
- Keep simple; use existing TRV & control strategy unless upgrading.
- Balance: open lockshield incrementally to maintain even warmth, confirm target ΔT and room comfort.
✅ Commissioning Checklist
- Radiator + Add2Rad loop hot and even along run
- No weeps at joints; wipe test passes
- Controls respond (TRV/room stat)
- Record: room name, metres fitted, flow & return temps, photos
Download the commissioning sheet →
🧪 Warm-Up & Noise Checks
- Warm-up within expected time (room size dependent)
- Listen for expansion ticks → adjust fixings or add felt pads if necessary
- Verify no air pockets (bleed if required)
🪜 Tricky Spaces (Bays, Alcoves, Doors)
- Bays: segment into straight runs; mitre trims as per kit
- Fireplaces: bypass with short connector or re-route behind trim
- Doors: stop/continue with threshold connector; maintain circuit integrity
- Kitchens/wardrobes: exclude behind built-ins; compensate on free walls
🔌 Controls & Low-Temp Operation
- Keep TRVs unless upgrading to smart stats
- For heat pumps: set weather compensation, start ~45 °C and trim down
- For boilers: run lower flow temps for condensing gains; confirm comfort
🧯 H&S and Quality
- Use RAMS on occupied homes
- Prote