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As of 13 August 2026, AI can compare boiler replacement quotes.
This still needs a person who signs their name to it.
Can you do it?
5 minutesto a draft.
30 minutesto something you’d act on.
Cost, all in£0
Skill neededchat-fluent
Who has to check ityou
What the alternative costsThe alternative is asking a professional heating engineer to assess the installation and compare what each quote includes.
If this goes wrong: you choose a cheaper quote that excludes important work or specifies unsuitable equipment, and correcting the installation costs more than the apparent saving.
What to actually do
Hand it to a person
The route this page recommends
A person who owns the outcome does this end to end, worth it when the failure is dear.
Use a tool built for this
Second choiceDo it yourself
The distant thirdA chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.
How to actually do it
- Open each quote, including any attachments or emails, and copy the full text into separate labelled sections without removing prices, exclusions, warranty terms or notes about the property.
- Gather the property details the installers used, including the existing boiler and heating system, hot-water requirements, known pressure problems, and any requested changes to radiators, controls or pipework.
- Paste the property details and all labelled quotes into the prompt, keeping the original wording and asking the model to mark missing information as not stated.
- Ask the model to produce a side-by-side table, check each quote's arithmetic, list exclusions and flag differences that could explain the price gap.
- Compare the drafted table line by line with the original quotes and correct every boiler model, warranty, included item, exclusion, VAT treatment and total that does not match.
- Send each installer the model's unanswered questions and ask for written confirmation of boiler sizing, included work, certification, warranty, payment terms and any work not covered by the quote.
- Use the written replies and corrected totals to choose a quote, and ask a qualified heating professional about any technical point you cannot verify from the documents.
Prompt
Compare the boiler replacement quotes below for a UK home. Do not invent missing facts and do not assume that the cheapest quote is best. Create a table with one row per quote and columns for boiler make and model, output or capacity, warranty, controls, flue work, condensate work, system cleaning or flushing, removal of the old boiler, changes to pipework or radiators, building work, certification, labour, VAT, payment terms, exclusions, and total price. Keep quoted wording where it matters and mark anything missing as "not stated". Then identify differences, possible double-counting, unclear terms, and questions I should ask each installer. Check the arithmetic in each quote where possible, but do not claim that a boiler is correctly sized or that an installation is safe from the quote alone. Separate factual comparisons from judgement. Use pounds and UK terminology. Details about the property: [property type, number of bedrooms, bathrooms, occupants, existing boiler and heating system, and any known hot-water or pressure issues]. Quotes: [paste quote 1]. [paste quote 2]. [paste quote 3 if applicable].
Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.
What it gets wrong
- AI cannot determine from a quote alone whether the proposed boiler is correctly sized for your home.
- AI cannot inspect the flue, condensate route, pipework, controls or ventilation on site.
- AI cannot establish whether an installer will carry out safe and compliant work.
- AI cannot turn vague wording such as "minor alterations" into a reliable final cost.
- AI cannot take responsibility for your choice of installer or the completed installation.
Even on a YES, the friction has a name: judgement under ambiguity, verification cost and stakes of error.
How we scored this
Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.
| Axis | Score (0–2) |
|---|---|
| Output | 2 |
| Inputs | 2 |
| Verification | 1 |
| Liability | 1 |
| Effort delta | 2 |
| Total | 8 / 10 |
The methodology and its thresholds are published in full.
FAQ
- Can AI compare boiler quotes?
- Yes. It can put several quotes into the same table, highlight what is included or excluded, check stated arithmetic and produce questions for the installers. It cannot confirm that the proposed boiler or installation is technically suitable from the paperwork alone.
- Can ChatGPT tell me which boiler quote is best?
- It can explain the differences and show which quote includes more or leaves fewer items unclear. It should not make the final technical choice without information from the installer and, where needed, a qualified heating professional.
- What should I check in a boiler replacement quote?
- Check the exact boiler model, sizing, controls, flue and condensate work, system cleaning, pipework, removal, certification, warranty, VAT, payment terms and exclusions. Ask the installer to confirm in writing anything the quote does not state.
- Is the cheapest boiler replacement quote best?
- Not necessarily. A lower quote may leave out controls, pipework, remedial work, certification or other necessary items, so compare the complete scope rather than the headline total.
Nearby answers
Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.
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