The F-Gas Quarter: Certified Capability Ahead of the 2027 Step-Down

October is a strange month to think about selling. The heating season is properly under way, the phones are busy, and most owners I speak to are running flat out rather than looking up. But there is a date sitting quietly on the calendar that changes the value story for a great many HVAC businesses, and it is close enough now that it deserves an hour of attention: 1 January 2027.

On that date the amount of HFC refrigerant that can legally be supplied to the market takes its next scheduled step down. Nothing about the rule is new. What is new is the proximity, and the fact that a government review earlier in the year, which proposed an even steeper cut, was paused and left the existing step exactly where it was. This briefing walks through four connected things: the step-down itself, why certified competence keeps appreciating because of it, the government money building demand the market has not fully priced, and the preparation window that owners eyeing a 2027 or 2028 exit are now inside. Everything here draws on published sources; where a figure appears, it comes from the body that produced it.

The Step-Down Is Unchanged, and It Is Coming

The GB F-Gas Regulation controls the phasedown of hydrofluorocarbon refrigerants, the gases that run through most air conditioning and refrigeration systems. It works by capping the quantity that can be placed on the Great Britain market and reducing that cap in scheduled steps. The next step is a significant one: supply falls to 24 per cent of the 2015 baseline from 1 January 2027, and then to 21 per cent in 2030.

For much of the past year there was an open question over whether that step would hold. Defra ran a consultation from November 2025 on reforming the phasedown, and it attracted well over a hundred responses. The outcome, announced in May 2026, was that the government would not legislate during 2026 to change the steps taking effect from 1 January 2027. In other words, the reform conversation continues, but the existing schedule stands. A pause on reform is not a softening of the deadline; it left the step exactly where it always was.

The practical effect for a working business is felt through refrigerant supply and price. As the cap tightens, the volume of virgin HFC available shrinks, prices for the higher-carbon gases climb, and the pressure to recover, reclaim and reuse refrigerant, and to move customers towards lower-carbon alternatives, gets stronger. None of this stops the work happening; heating, cooling and refrigeration systems still need servicing whatever the refrigerant regime. It simply means the work increasingly has to be done by someone who is qualified to handle a tightening, regulated commodity.

That is the thread running through this whole briefing. A regulatory squeeze on refrigerant does not reduce demand for competent HVAC businesses; it concentrates that demand on the ones that can operate cleanly inside the rules. If your business already works to F-Gas certification as a matter of course, the step-down is not a threat to plan around. It is a moat being deepened around the capability you already have.

The Competence Premium: The Phasedown Reprices Your Team

Every HVAC owner knows that qualified people are hard to find. Fewer stop to connect that difficulty to a regulatory calendar that keeps making qualified people scarcer relative to the work in front of them.

Start with the wider workforce picture, because it is the backdrop against which the phasedown lands. Government modelling referenced in parliamentary evidence puts the number of trained MCS heat pump installers at roughly 9,000, against an estimate of around 50,200 needed by 2030. Gas Safe's own decade review put the average age of registered engineers at just over 45, and the industry's reviews keep flagging a large cohort of the workforce approaching retirement. The pipeline of new entrants is not filling the gap at the rate the transition needs.

Now layer the F-Gas step-down on top. Tighter refrigerant supply raises the premium on the specific competence to work with it: recovery, reclaim, leak-tightness, and the judgement to design and service systems around lower-carbon gases. Certification in this area is not a badge on the wall; it is permission to do work that fewer and fewer people are qualified to do, on systems that are not going away.

A buyer can copy your pricing and your patch. What they cannot conjure at short notice is a certified team that can legally do the work a tightening rulebook restricts.

This is why certification coverage sits so prominently in due diligence now. When an acquirer looks at an HVAC business, they are assessing whether the capability travels with the deal or walks out of the door. A firm where F-Gas, Gas Safe and MCS competence is spread across a stable, retained team is bringing the buyer the one input they cannot buy on demand. A firm where all of that sits with the departing owner is asking the buyer to take on the risk of replacing it, and that risk is priced into the offer.

The September briefing on the heating season made a related point about the service book proving itself in the busy months. The same logic applies to your people: the winter that is starting now is when a certified, well-run team demonstrates, in live data, that the capability is real and durable. That evidence is worth gathering deliberately rather than leaving to memory.

Warm Homes Money and the Demand Not Yet Priced In

While the refrigerant rules tighten on the supply side, government policy is pushing hard on the demand side, and the scale of that push is not yet fully reflected in how many owners think about their businesses.

The centrepiece is the £15 billion Warm Homes Plan, which includes a loan package of around £2 billion. Within that, up to £1.7 billion is earmarked for new low and zero interest consumer loans covering heat pumps, solar and batteries, with a further sum set aside to lower the cost of those loans. The point of low and zero interest finance is blunt: it removes the upfront cost that stops many households from installing a heat pump. Alongside the money, permitted development rights in England were relaxed in May 2025 so that more households, including those with limited outdoor space, can install an air source heat pump without a planning application. That takes out a second point of friction, the planning delay, that used to slow or sink installations.

Set that beside the measures already running. The Boiler Upgrade Scheme grant for replacing oil heating with a heat pump rose to £9,000 for oil-heated homes from July 2026, and the Clean Heat Market Mechanism now requires heat pumps to reach 8 per cent of relevant boiler sales in the 2026-27 scheme year, with financial consequences for manufacturers that fall short. Taken together, this is grant support, cheap finance, planning freedom and a manufacturer obligation all pointing the same way at once.

Here is why it matters to a valuation even if you never chase a single grant-funded job. Buyers do not pay for last year's turnover; they pay for confidence that revenue will still be there through a five-year hold. A business that can install and, crucially, maintain heat pumps is selling access to demand that policy is actively underwriting. And every heat pump fitted under these schemes becomes a service and maintenance need for the next fifteen years, which is exactly the recurring, contracted income that sits at the top of the range.

On that range, the sector's fundamentals have held. UK HVAC businesses typically transact in the region of 3x to 6x EBITDA, with contract-rich, well-certified operators at the top end; for wider context, the UK and Ireland mid-market as a whole has averaged around 5.3x in 2025 reporting. Where a specific business sits inside that band is driven far more by the quality of its recurring revenue and the strength of its certified team than by anything said across the negotiating table.

The Preparation Window, Autumn Edition

Put the first three forces together and you have a sector where supply of capability is tightening, demand is being underwritten by policy, and the businesses that can prove certified competence are the ones buyers compete for. The natural question for an owner is: what does that mean for my timing?

The honest answer is that it depends on when you want out, and the useful work starts well before that date. Preparation that genuinely changes an offer, documenting the contract book, evidencing certification coverage, reducing the business's dependence on you, and stabilising the key engineers, takes 12 to 24 months to put in place credibly. That is not a delay tactic; it is the difference between telling a buyer the capability is real and showing them. So the owners for whom this autumn quarter matters most are those eyeing a 2027 or 2028 exit, because they are inside that window right now.

The season helps. The heating months generate the very data a buyer scrutinises: planned maintenance completed on time, reactive response times, contract renewals, the mix of recurring versus project income. A winter worked deliberately, with records kept, becomes the evidence file for a sale twelve or eighteen months out. This is the autumn version of a point that holds all year: the best time to gather proof of how the business runs is while it is running hardest.

The tax backdrop rewards knowing your position early rather than late. Business Asset Disposal Relief has been 18 per cent since 6 April 2026, applying to the first £1 million of qualifying lifetime gains, with the main 24 per cent rate above that. Even at 18 per cent it is worth up to £60,000 on a full £1 million gain, and it is the date of the binding contract (usually exchange), not the day heads of terms are agreed, that fixes the rate. The separate £2.5 million cap on Business Property Relief for inheritance tax, in force since April 2026, has given owners of larger businesses a fresh reason to review whether holding indefinitely still makes sense. None of that is tax advice, and none of it should drive a decision to sell; it should simply inform the timing of a decision you make for your own reasons.

Options are the one thing you cannot create in a hurry once a buyer is at the table. This quarter is when you build them.

What the F-Gas Quarter Means for You

The four forces are connected, and that is the point. A regulated squeeze on refrigerant tightens the supply of businesses that can operate cleanly inside the rules. The workforce shortage and the ageing register make certified people scarcer still. Government money is underwriting the demand those people serve. And the reward for reading all of this early is that you have time to prepare, which is the only variable in the whole picture that is genuinely within your control.

None of this says sell now. It says that if a 2027 or 2028 exit is anywhere in your thinking, this is the quarter to establish an honest baseline: what the business is worth today, where its certification and contract strengths sit, and what a buyer would question. Whether you act next year or hold for longer, the preparation is identical, and it is far easier to do calmly this winter than under pressure with a buyer waiting.

It commits you to nothing. It simply tells you what your options look like, and the weeks before the coldest months are a good time to find out.