Ashburn, VA

Ashburn, VA

# How much does a gas boiler cost?

$2,200 –$7,000standard-efficiency boiler cost
$4,000 –$10,000high-efficiency boiler cost

Get free estimates for your project or view our cost guide below:

## $4,000 –$10,000high-efficiency boiler cost

Get free estimates for your project or view our cost guide below:
Written by
Sarah Noel
Fact-checked by
Tom Grupa

## Gas boiler prices

A gas boiler costs $3,200 to$9,000 to replace on average. Residential gas boiler prices are $1,200 to$7,000 for the unit alone, plus $1,000 to$3,500 for labor to install. Natural gas boiler prices depend on the type, brand, BTU output, and efficiency or AFUE rating.

Gas boiler cost
House size (square foot) Total replacement cost
1,200 – 2,000 $2,200 –$5,700
2,000 – 2,800 $2,400 –$6,200
2,800 – 3,600 $3,000 –$7,100
3,600 – 4,000 $3,200 –$7,300

*Prices are based on a standard-efficiency boiler.

## Average cost to install a gas boiler

The following table shows the average cost to install a gas boiler.

### Does a gas boiler use electricity?

A gas boiler uses 160 to 200 Watts of electricity for powering the:

• Ignition

• Thermostat connection

• Display screens

• Internal fan

• Central heating pump

For comparison, a boiler’s power consumption is the equivalent of 2 to 4 lightbulbs, or less power than the average television or stereo receiver.

Still have questions? Ask a pro.

## Getting new gas boiler quotes

Before hiring a boiler installer near you, be sure to:

• Choose HVAC professionals with certifications from:

• Compare at least three new boiler estimates from experienced installers.

• Select licensed, insured, and bonded HVAC contractors.

• Avoid choosing the lowest gas boiler quotes that signal low-quality work.

• Review their ratings on HomeGuide and Google.

• Request copies of estimates, plan diagrams, heating-load calculations, equipment orders, permits, warranties, and contracts.

• Verify the bids include material, labor, equipment costs, and the installation schedule.

• Set up a payment schedule. Never pay in full upfront.

• What type of gas boiler do you recommend for my home, and why?

• How long have you been installing boilers, and can I see references from past jobs?

• Will you make a Manual J heat-load calculation to size my boiler?

• Which kind of gas boiler and brands have you installed the most?

• What’s the efficiency rating for this unit?

• Does this boiler have zoning capabilities for room-by-room climate control?

• Is this boiler compatible with my existing thermostat, or will I need extra wiring?

• Are there any local boiler manufacturer rebates available for this model?

• Will your estimate include removal and disposal of the old boiler? If not, how much extra will that cost?

• Should I expect any additional costs?

• Will you pull all the permits needed?

• How long will the installation take?

• What does the warranty cover, and how long does it last?

• How can I extend the boiler’s lifespan?

• Did the old boiler fail due to lime-scale buildup, and if so, how can I prevent it?

• Do you offer a maintenance plan, and how much does it cost?