It is the question every HVAC business owner eventually asks, and the answer is almost never as simple as anyone would like it to be. The value of your business is not a fixed number. It depends on a range of factors, some within your control and some determined by the market. But understanding how valuations work, and what drives them higher or lower, puts you in a much stronger position whether you are planning to sell in six months or six years.
This guide explains the mechanics of HVAC business valuations in plain English, with a worked example that shows how small improvements can make a material difference to your exit price.
How Valuations Work: SDE and EBITDA
Most business valuations are based on a multiple of earnings. The two measures you will encounter are SDE and EBITDA.
SDE (Seller's Discretionary Earnings) is the profit of the business after all operating expenses, plus the owner's salary, personal benefits, and any non-recurring or discretionary expenses added back. It represents the total financial benefit available to a single owner-operator. SDE is commonly used for smaller, owner-managed businesses.
EBITDA (Earnings Before Interest, Tax, Depreciation, and Amortisation) is the standard profit measure for mid-sized businesses. It strips out financing costs, tax, and accounting adjustments to show the underlying operational profitability. EBITDA is typically used when the business has a management team and the owner's salary is already reflected as an employee cost.
For most HVAC businesses with turnover below £1 million, SDE is the more relevant measure. For larger businesses, EBITDA is standard. Your broker will advise on which is appropriate for your situation.
Typical Multiples for HVAC Businesses
In the current market, HVAC businesses typically sell for between 3x and 6x EBITDA. That is a wide range, and where your business falls within it depends on a number of specific factors.
At the lower end (3x to 4x): businesses with high owner dependency, low recurring revenue (below 40 per cent from maintenance contracts), reactive and callout-heavy income, limited qualifications, poor geographic density, or concentrated client risk.
At the higher end (5x to 6x): businesses with strong recurring revenue (above 60 per cent), low owner dependency, qualified teams with Gas Safe and F-Gas certifications, MCS accreditation, heat pump capability, good geographic density, diversified client books, and clean three-year accounts.
The difference between a 3.5x and a 5x multiple on the same EBITDA is not a rounding error. On a business earning £100,000 EBITDA, that is the difference between £350,000 and £500,000. The factors that drive the multiple higher are specific, identifiable, and in most cases improvable.
What Drives the Multiple Higher
Recurring Contract Revenue
This is the single most important factor. Maintenance contracts provide predictable, recurring income that transfers with the business. A buyer can forecast revenue from day one. The higher your recurring percentage, the lower the risk to the buyer, and the more they will pay.
Team Qualifications and Retention
Gas Safe registration, F-Gas certification, and MCS accreditation across your engineering team demonstrate capability and compliance. Long-serving, qualified engineers who are on proper employment contracts with documented training records are worth real money to a buyer.
Heat Pump Capability
As covered in our article on the gas boiler phase-out, businesses with genuine heat pump installation capability are commanding a premium in the current market. MCS accreditation, a track record of installations, and trained engineers all contribute to this premium.
Low Owner Dependency
If the business can operate smoothly when you are on holiday for two weeks, that is a good sign. If everything stops when you are not there, that is a risk the buyer will price into their offer. Building a management layer, documented systems, and clear processes reduces owner dependency and improves your multiple.
Geographic Density
Tightly clustered contracts within a manageable radius make the business more efficient and more attractive to buyers, particularly PE-backed consolidators looking for bolt-on acquisitions in specific regions.
Clean Financial Records
Three years of professionally prepared accounts, with clear revenue categorisation and no unexplained adjustments, give buyers confidence. Poor or incomplete records create uncertainty, and uncertainty always reduces what a buyer is willing to pay.
What Suppresses the Multiple
- High owner dependency: the business relies on you for key client relationships, pricing decisions, or day-to-day operations
- Reactive revenue: most income comes from emergency callouts and one-off jobs rather than contracted maintenance
- Poor fleet condition: vehicles that need replacing, equipment that is outdated or poorly maintained
- Concentrated client risk: one or two clients account for more than 25 per cent of revenue
- No heat pump capability: in the current market, this is increasingly seen as a gap rather than neutral
- Informal employment arrangements: engineers without written contracts, patchy training records, or lapsed certifications
A Worked Example
Let us look at a hypothetical HVAC business to see how the numbers work in practice.
Current position: £400,000 turnover, £80,000 EBITDA, 55 per cent recurring revenue from maintenance contracts, Gas Safe registered team but no MCS accreditation, moderate owner dependency.
At a 4x multiple (reflecting the moderate recurring revenue and lack of heat pump capability), this business would be valued at approximately £320,000.
Now consider what happens with some targeted improvements over the next 12 to 18 months. The owner focuses on converting more customers to maintenance contracts, pushing recurring revenue to 70 per cent. They achieve MCS accreditation and complete a handful of heat pump installations. They hire a service manager to reduce their day-to-day involvement. EBITDA stays at £80,000, but the improved profile justifies a 5x multiple.
At 5x, the same £80,000 EBITDA produces a valuation of approximately £400,000. That is £80,000 more, without the business earning a single extra pound of profit. The improvement comes entirely from the quality of the earnings and the reduced risk to the buyer.
This is why we encourage owners to think about valuation not just as a snapshot of today, but as something that can be actively improved. The changes that move the multiple are specific, achievable, and well worth the effort.
A Note on Accuracy
Every business is different. The multiples and examples in this article are based on typical market conditions and are intended to illustrate how valuations work, not to predict the exact value of any specific business. Location, timing, buyer demand, and dozens of other factors all play a role in the final number.
The best way to understand what your specific business is worth is to have a confidential conversation with a broker who understands the HVAC sector. We can look at your actual numbers, your team, your contracts, and your market position and give you a realistic assessment of where you stand.
Getting Started
Whether you are ready to sell now or want to understand what improvements would make the biggest difference to your exit value, we are happy to help. A confidential valuation conversation costs nothing and commits you to nothing. It simply gives you the information you need to make an informed decision about your future.
