Is $21,000 to install a Navien combi boiler a fair price?
Project Details
I replaced a 30-year-old boiler with a Navien combi boiler. Since the install, I have been having a lot of issues. It has been between 10 degrees and 30 degrees outside, and my home has struggled to get above 70 degrees. Additionally, my baseboards are making a lot more noise than normal. There is also a new knocking sound in my bathroom floor after running the hot water for more than 30 seconds. The install team has been out 10+ times to "adjust settings" on the boiler, but they can't seem to figure out why the heat can't surpass 70. They suggested replacing all of the fin tube baseboards. I spent ~$21,000 on this boiler install, and with the noises and the inability to heat my house to full capacity, something doesn't seem right.
Quote Details
The project involved replacing an existing 30-year-old boiler with a new Navien combi boiler. This was a full installation service. - Removal of the old 30-year-old boiler unit - Installation of the new Navien combi boiler
You say...
Vote Distribution
These ratings are not endorsed by Quote Critic. They are submitted by other Quote Critic users like you.
More Details
Category
HVAC
Price
$21,000
Quote Date
February 22, 2026
Brand/model
Navien combi boiler
System type
Boiler
Comments
No comments yet
Sign in to share your thoughts and ask questions.
Similar Quotes
Replace a 75 gallon natural gas power vented water heater
This quote includes the supply and installation of a new 75-gallon natural gas power vented water heater, along with all necessary piping and fittings. - Water Heater Type: 75 gallon natural gas power vented - Included Components: Mixing valve, Expansion tank - Piping Material: 3/4 copper - Fittings: All 3/4 fittings needed to assemble the water heater correctly
Install a navien combi boiler system
Replace existing boiler and 40-gallon tank with a space-saving combination unit. - Installation of Navien combi boiler - Removal of existing Williamson boiler and water tank - Configuration for 40 linear feet of baseboard hydronic heating - Single zone setup
Install a navien combo boiler and redo all system piping
Replace existing furnace and hot water heater with a high-efficiency combination unit and update distribution components. - Install Navien combo boiler system - Redo all mechanical room piping - Replace all water pumps (including two recently installed units) - Includes 10-year warranty on parts and labor contingent on $400/year service plan