Top 10 Boiler Installation in Denver, CO
The best boiler installation companies in Denver, CO for 2026 include Apex Clean Air AC & Heating Repair (4.9), Roots Heating & Air (5), Heart Heating, Cooling, Plumbing & Electric (4.8). All install high-efficiency gas, oil, and combi boilers with full warranties.
Boiler Installation in Denver, CO: Choosing the Right System
Replacing a boiler in Denver, CO is a significant home upgrade. Modern high-efficiency boilers can cut heating costs by 20-30%, but proper sizing and installation are critical to realizing those savings.
- Compare combi vs system vs conventional boilers for your home type
- Ask about available utility rebates for high-efficiency installations
- Ensure the installer handles all permits and inspections
Advanced Boilers & Hydronic Heating
Blue Sky Plumbing, Heating, Cooling & Electric
Blue Sky Plumbing, Heating, Cooling & Electric
Brothers Plumbing, Heating & Electric
Heart Heating, Cooling, Plumbing & Electric
Golden West Plumbing, Heating, Air Conditioning, and Electrical
Applewood Plumbing Heating & Electric
Swan Plumbing, Heating & Air of Denver
Right Away Heating
Ultimate Heating, Cooling, Plumbing & Electric
How We Ranked These Denver Pros
Our rankings are based on a weighted evaluation of five key factors:
- Licensing & Insurance — All listed businesses hold active state licenses verified through official databases.
- Customer Reviews — We aggregate ratings from Google, Yelp, and the BBB, weighting recency and review volume.
- Response Time — Companies offering same-day or 24/7 emergency service score higher.
- Pricing Transparency — Businesses who offer flat-rate pricing or free estimates rank above those with opaque billing.
- Experience & Longevity — Years serving the Denver market and breadth of services factor into overall reliability.
Rankings are reviewed quarterly. Have a correction? Contact us.
Frequently Asked Questions
How much does boiler installation cost in Denver?
Boiler installation in Denver costs $3,500-$8,000 for a standard gas boiler. High-efficiency condensing boilers cost $5,000-$12,000. Combi boilers (heating + hot water) cost $4,000-$10,000.
What is a combi boiler?
A combination boiler provides both central heating and hot water on demand — no separate water heater needed. Compact, efficient, and ideal for smaller homes. Saves space and reduces energy bills.
How long does boiler installation take?
Straight replacement (same type/location) takes 1-2 days. Switching fuel type or relocating the boiler takes 2-4 days. New installation with radiators takes 3-7 days.