Heating Engineer Estimate Template
Plenty of heating enquiries arrive as a phone call: a combi swap, a boiler moved to the loft, a full system conversion. Before you have stood in the property, any figure you give is an estimate, an honest approximation based on what the customer has told you, and the document should say so plainly. This template is built for exactly that situation. It gives the customer a realistic number and a breakdown, while making clear the figure is subject to a site survey and could change if the job turns out to involve more than expected.
The way to protect yourself is to list your assumptions next to the price. A boiler replacement estimate might assume the existing gas supply pipe is adequately sized, the flue can be reused or swapped like for like without a plume kit, the system water only needs a chemical flush rather than a full powerflush, and the radiators are staying. Each assumption is a line you can point to later. Where you suspect hidden work, say so: corroded pipework under floors, a scaled heat exchanger, or an old flue that may contain asbestos all justify a revised figure once the system is opened up, and customers accept that far better when it was flagged in writing beforehand.
Once you have surveyed, convert the estimate into a fixed quote for the defined work, including Benchmark commissioning, Building Regulations notification and the manufacturer warranty. Download the template in Word or PDF, or build the document online.
What to include in a heating engineer estimate
- Your business details, Gas Safe registration number and an insurance note
- Customer name, address, site address if different, estimate number and date
- The word estimate, plus a statement that the figure is approximate
- A note that the price is subject to a site survey
- Assumed scope: boiler type, flue arrangement, filter and flush method
- Assumptions about existing pipework, gas supply size and radiators
- Likely extras if hidden problems appear once the system is opened up
- Validity period for the estimated figure, normally 30 days
- VAT treatment, and what happens next: survey, then a fixed quote
Download the template
Or build it online, free
The quote generator produces the same professional document in your browser and saves as a PDF. For an estimate, simply title the document as an estimate and add your assumptions in the notes.
Open the quote generatorHeating engineer estimate FAQs
What is the difference between an estimate and a quote?
An estimate is an approximate figure based on the information you have at the time, and it can change once the job is surveyed properly or opened up. A quote is a fixed price for clearly defined work. If you give an estimate, label it as one and state what it assumes, so the customer understands the number can move.
When should I send an estimate rather than a quote for heating work?
When you have not seen the property. A customer asking for a ballpark figure for a boiler swap over the phone gets an estimate; a customer you have surveyed gets a fixed quote. Estimates are also sensible for full system conversions where the state of the existing pipework is unknown until floors come up.
What hidden problems can change a heating estimate?
The usual ones: an undersized gas supply pipe that needs upgrading, corroded radiators or pipework that will not survive a powerflush, a scaled-up heat exchanger or cylinder, asbestos in an old flue, and poor system water quality meaning a full powerflush instead of a chemical flush. List these as assumptions on the estimate so a change in price never comes as a surprise.
Can I edit the heating engineer estimate template?
Yes. Download the Word version to change the wording, add your logo and adjust the sections, or use the free online quote generator to build the same document in your browser, title it as an estimate and save it as a PDF.