Heat pump replacement and upgrades in Teesside
Replacing an existing air source heat pump in Teesside costs £6,000 to £10,000 in 2026, less than a first-time installation because the cylinder, emitters and pipework are usually sound enough to reuse. Failed compressors, first-generation units past their service life and badly designed systems that never ran efficiently all fall into this work.
Three reasons systems get replaced
The first is age. Units fitted under the early Renewable Heat Incentive around 2014 to 2016 are now at 10 to 12 years, and once a compressor or inverter board fails the repair bill often approaches half the cost of a modern unit that is measurably more efficient. The second is failure: a leaking heat exchanger or a seized compressor on an unsupported model with no parts available. The third, and the most common on Teesside, is a system that was never designed properly, sized by guesswork, running at 55 degrees, with an electricity bill that made the owner regret the whole idea.
What gets reused, what does not
A replacement starts by testing what is already there. Sound 22mm primaries, a serviceable unvented cylinder with a good coil, and emitters that were correctly upsized first time all stay. What comes out is the unit itself, the old controls where they cannot support weather compensation, and any undersized emitter the original design skipped. That is why the range starts at £6,000: on a well built system it is genuinely a unit and controls swap plus recommissioning.
Rescuing a poor design
Where the original design was the problem, replacement without redesign repeats the mistake. The fix is a fresh heat loss calculation, a lower design flow temperature, the two or three emitters that were left too small, and proper weather compensation so the system modulates instead of cycling. Owners routinely see running costs fall by a quarter or more from that work alone, with no change to the outdoor unit at all.
Grants and replacements
The Boiler Upgrade Scheme funds replacing fossil fuel heating, not replacing one heat pump with another, so a straight like-for-like swap is not grant eligible. That makes the arithmetic different from a first installation and it is stated plainly in the quote. Where the property still has an old oil or LPG system alongside, grant eligibility is worth checking before anything is ordered.