Topic-specific guidance
What a good written quote includes needs its own estimate logic because how to read equipment, scope, assumptions, exclusions and payment terms. The useful first step is to connect the customer's room, evidence, constraints and budget before comparing equipment, dates or written scope. Treat any missing photo, route detail or permission note as an estimate risk rather than a small admin gap. That discipline keeps the article useful for customers and traceable for the team reviewing the enquiry later.
A good written quote names indoor unit, outdoor unit, capacity, controls, pipe route, condensate route, mounting and commissioning.
Assumptions and exclusions should be visible: electrical work, access equipment, making good, parking, landlord permission and planning checks.
Warranty needs detail. Equipment warranty, workmanship, registration and servicing expectations are separate points.
Payment terms should be written separately from the online estimate because the website does not take online payment.
A good quote should let the customer compare scope, not just total price. The reader should see what equipment, work, assumptions and exclusions sit behind the number.
Evidence should include model references, capacity, room served, pipe route, condensate route, outdoor location, electrical scope, access assumptions, photos reviewed and any unresolved permissions.
The quote should separate included work from provisional work and excluded work. Payment terms, warranty and what would change the price should be written plainly.
The risk is a cheap-looking quote that becomes expensive through missing scope. Clear exclusions protect both customer and installer.
When What a good written quote includes is used in the enquiry form, pair the question with the target room, preferred temperature, daily use pattern, budget boundary, outdoor-unit option, access limits, noise sensitivity, drainage route, controller expectation, service access and any permission constraint. That gives the estimator an auditable set of assumptions instead of a single isolated topic.
A price is not a quote
A number in an email is not something you can hold anyone to. A written quote should let you tell, without asking a single follow-up question, exactly what will arrive, exactly what will be done, and what is deliberately not included. If two quotes cannot be compared line by line, at least one of them is incomplete.
The test is simple: could a different installer read this document and carry out the same work? If not, the gaps are the parts that will be argued about later, usually on the day, usually with the work half done.
The lines that must be there
Equipment, by make, model and capacity, for every indoor and outdoor unit — not a brand name on its own. Without model numbers you cannot compare like with like, and you cannot check the noise or efficiency figures you were told.
The work: pipe run length and whether it is concealed or trunked, the drain route and whether a pump is included, any electrical work and who certifies it, brackets and mounting, and making good afterwards. Then commissioning, handover and the removal of packaging and any old equipment.
The commercial terms: total price with VAT stated explicitly, deposit and payment stages, expected duration, warranty length for parts and labour, and anything the warranty depends on such as annual servicing or registration.
Exclusions are the most useful part
A quote that lists nothing as excluded is not a comprehensive quote; it is one that has not thought about it. Good exclusions are specific — scaffolding if the outdoor position turns out to need it, consumer unit work if the board is full, redecoration beyond making good, asbestos or structural findings.
Read them as a list of the things most likely to change the price later, because that is exactly what they are. A vague quote with no exclusions is not safer than a detailed one with several; it simply moves the conversation to the day of installation.
Comparing three quotes without a spreadsheet
Three quotes rarely describe the same job, which is why comparing the totals tells you very little. The useful first step is to pick the most detailed one and treat it as the specification, then read the other two against it and write down only what is different — a smaller unit, no electrical work, an outdoor position on a different wall, no removal of the old equipment.
That list is usually short, and it is the whole comparison. Most apparent price gaps close once you can see that the cheaper quote excluded the consumer unit work or assumed a shorter pipe run, and the ones that do not close are the genuine differences worth paying for or declining.
Then go back to each installer with the specific gap rather than with the other prices. Asking somebody to explain why their quote does not include something gets a useful answer; telling them a competitor is cheaper generally gets a discount on a scope you still do not understand, which is how people end up with the wrong system at a good price.
What to ask before you sign
Ask what would change the price once work starts, and get the answer in writing. Ask whether the price is fixed or an estimate. Ask who will actually carry out the work, and whether they hold F-Gas certification for handling refrigerant.
Then be wary of pressure. A price valid only today is a reason to slow down rather than to hurry, and a legitimate installer will be comfortable with you taking a few days to compare. The separate guide to VAT, deposits and payment stages covers what a reasonable payment schedule looks like.
