Chimney & fireplace
Gas Fireplace Cost Calculator
Prices a gas fireplace, where the venting choice is the decision that matters.
Result
A planning estimate, not a quote. Access, the age of the equipment, what is found once it is opened up and local labour rates all move the real figure, sometimes a long way.
Get a Free Business AuditHow the calculation works
Hours times crew times rate, plus the appliance, venting and the call-out. Gas fireplaces come in three vent arrangements and they are genuinely different products. Direct vent draws combustion air from outside and exhausts outside through a sealed system, which is the common and safest arrangement. B-vent uses indoor air and vents vertically. Vent-free burns indoors with no flue at all, which is why it is the one with the most constraints and is prohibited in some jurisdictions.
What moves the number
- Vent type, which determines the installation and where the unit may go.
- Whether gas supply exists at the location or has to be run.
- BTU input, which affects both gas line sizing and the heat delivered.
- Whether the appliance is being installed in an existing masonry fireplace.
Where this one goes wrong
Vent-free appliances put all their combustion products into the room, including water vapour and carbon monoxide at the levels the appliance is designed to produce, which is why they carry room size requirements, oxygen depletion sensors, and restrictions on use in bedrooms and bathrooms, and are prohibited outright in some jurisdictions. The moisture they add is also a genuine cause of condensation and mould complaints. Whether to use one is a code and suitability question rather than a preference, and the answer should come from the local rule rather than the showroom. Direct vent is the arrangement that avoids the whole category of concern.
Before you quote
- Confirm whether vent-free appliances are permitted locally before offering one.
- Check room volume requirements and prohibited locations for vent-free.
- Size the gas line for the appliance input rather than assuming.
Where the rules come from
Questions
About this calculator
What is the difference between direct vent and vent-free?
Direct vent draws combustion air from outside and exhausts outside through a sealed system. Vent-free burns indoors with no flue, putting all its combustion products including water vapour into the room. Direct vent avoids that entirely, which is why it is the common recommendation.
Are vent-free gas fireplaces safe?
They are regulated specifically because of what they put into the room: minimum room volumes, oxygen depletion sensors, restrictions on bedrooms and bathrooms, and outright prohibition in some jurisdictions. Whether one may be installed is a local code question, and the moisture they add also causes condensation complaints.
Can a gas insert go into my existing fireplace?
Commonly yes, and it is a frequent conversion, but it needs a correctly sized liner run up the flue for the appliance rather than venting into the open masonry chimney. Fitting an insert without that liner is one of the more common errors in this work.
The formula
total = hours x people x rate + parts + call-out, then sales tax
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How to use this calculator
- Hours on site (h). Enter your own figure; the page starts at 2 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $125.
- Parts and materials ($). Enter your own figure; the page starts at $65.
- Call-out or diagnostic fee ($). Enter your own figure; the page starts at $95.
- Sales tax (%). Leave at zero if you are quoting before tax.
The result updates as you type, so you can try a figure, see what it does to estimated total, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Hours on site | 2 h |
| People needed | 1 |
| Labour rate charged | $125 |
| Parts and materials | $65 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $410 |
| Labour | $250 |
| Before tax | $410 |
| Sales tax | $0 |
About $410: $250 of labour, $65 of parts and a $95 call-out.
How sensitive the answer is
Holding everything else steady and changing only labour rate charged, this is what happens to estimated total. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Labour rate charged ($) | Estimated total |
|---|---|
| $63 | $286 |
| $94 | $348 |
| $125 example above | $410 |
| $188 | $536 |
| $250 | $660 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 2 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $125.
- Parts and materials ($)
- A money amount, starting at $65.
- Call-out or diagnostic fee ($)
- A money amount, starting at $95.
- Sales tax (%)
- Leave at zero if you are quoting before tax.
What the results tell you
| Result | What it is |
|---|---|
| Estimated total | The headline result. A money figure. |
| Labour | A money figure. |
| Before tax | A money figure. |
| Sales tax | A money figure. |
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.