Tankless Water Heater Installation
Endless hot water with up to 30% energy savings. We install gas and electric tankless water heaters from Rinnai, Navien, Bosch, and Takagi — fully permitted, properly vented, and sized to your household demand.
Tankless Water Heaters: The Complete Guide for Colorado Homeowners
Tankless water heaters — also called on-demand water heaters or instant water heaters — heat water only when you need it, eliminating the standby energy losses of a traditional tank. For Colorado homeowners, this often translates to lower utility bills, endless hot water, and dramatically more useful space in basements and utility rooms.
How Tankless Water Heaters Work
When you turn on a hot water tap, cold water flows through the tankless unit, where a powerful gas burner or electric element heats it instantly. There's no tank holding 50 gallons of water at 120°F all day, every day. The result: hot water on demand, no recovery time between uses, and significantly less wasted energy.
Tankless Water Heater Benefits
- Endless hot water — never run out, even during back-to-back showers or simultaneous demand
- 20-34% energy savings for homes using under 41 gallons per day, per the U.S. Department of Energy
- Longer lifespan — typically 18-25 years compared to 8-12 years for tank water heaters
- Compact, wall-mounted design — frees up floor space in your basement or utility closet
- Reduced flood risk — no tank means no tank to fail and dump 50 gallons on your floor
- Federal and Colorado utility rebates available for qualifying high-efficiency models
Tankless Water Heater Cost in Colorado
A complete tankless water heater installation in Colorado typically runs $3,500 to $7,500, fully installed. The wide range reflects what's actually involved at your specific home:
- Whole-home gas tankless ($4,500-$7,500): includes the unit, gas line resizing if needed, new direct-vent or PVC venting, condensate management, and any required electrical
- Electric tankless ($2,500-$4,500): often requires an electrical panel upgrade, but no gas or venting work
- Point-of-use tankless ($800-$2,000): small electric units serving a single sink, shower, or remote bathroom
The investment typically pays back over the unit's lifespan through energy savings (averaging $80-$200 per year) and the longer service life (avoiding one or two tank replacements you would have otherwise needed).
Tankless Considerations for Colorado Homes
Colorado's hard water makes annual descaling essential — neglected tankless units can lose efficiency in as little as two years. We include the first year's descaling free with every tankless installation, and offer affordable annual maintenance plans to keep your unit running at peak performance and within warranty terms.
Tank Water Heaters: Still The Right Choice For Many Colorado Homes
Despite the popularity of tankless, traditional tank water heaters are still the best option for many households. They cost significantly less upfront, install in a few hours, and reliably deliver hot water for predictable demand patterns.
When a Tank Water Heater Makes Sense
- You're staying in the home only a few more years and want lowest upfront cost
- Your existing gas line, venting, and electrical are already sized for a tank
- Your hot water usage is consistent and well-served by 50-80 gallons of storage
- You want simple, proven technology with parts available everywhere
Tank Water Heater Sizing Guide
- 1-2 people: 30-40 gallon
- 2-3 people: 40-50 gallon
- 3-4 people: 50-60 gallon
- 5+ people or large soaker tubs: 75-80 gallon, or consider tankless
Tankless vs Tank Water Heater: Honest Comparison
The right choice depends on your household, budget, hot-water demand and how long you expect to stay in the home. Here is how we compare the two systems for Denver-area households:
📖 Want the full breakdown? We wrote a complete 15-year cost comparison guide with real numbers for installation, energy, maintenance, and lifespan.
Choose Tankless If:
- You'll be in the home 7+ years (payback timeframe)
- You have multiple bathrooms or simultaneous hot water demand
- You frequently run out of hot water with your current tank
- Floor space is at a premium
- You want the longest-lasting equipment with the lowest energy use
Choose a Tank If:
- Lowest upfront cost is your priority
- Your home isn't easily set up for tankless venting or gas upgrades
- Your hot water usage is steady and well-served by storage
- You're selling within a few years
Signs Your Water Heater Needs Repair or Replacement
Most water heater failures give warning. Catching these signs early can save thousands in water damage and avoid a no-hot-water emergency:
- Rust-colored or metallic-tasting hot water — the tank's protective lining is corroding from the inside
- Rumbling, popping, or banging sounds — sediment has hardened on the tank floor, insulating the burner from the water
- Water pooling around the base — even a small puddle is often the start of tank failure
- Hot water running out faster than it used to — element failure, dip tube issue, or sediment loss of capacity
- Tank water heater over 10-12 years old — most reach end of life around this point and become much more likely to fail
- Tankless error codes that keep returning — usually a sign of scale buildup or a sensor needing service
- No hot water at all — could be pilot light, thermocouple, gas valve, electric element, or thermostat
- Lukewarm water that won't get hot — heating element or burner issue
- Higher utility bills — declining efficiency from sediment or scale
Why Permits and Code Compliance Matter
Most Colorado jurisdictions require permits and inspection for water heater replacement, especially for gas equipment — and for good reason. Improper venting can create carbon monoxide risk, undersized gas lines can starve appliances, and missing required safety components can fail inspection. Aging supply lines may also need attention when a new unit is installed.
Proper permits help protect your home-insurance documentation, equipment warranty eligibility, and resale records. Everett Plumbing addresses required permits and inspections as part of the written installation scope.
Denver Metro Service Area
We provide water heater installation, repair, and tankless conversion across the Denver metro and nearby communities, including:
Denver Metro: Denver, Aurora, Lakewood, Westminster, Thornton, Arvada, Wheat Ridge, Englewood, Littleton, Commerce City, Broomfield, Northglenn, Centennial, Highlands Ranch, Parker, Castle Rock, Greenwood Village, Cherry Hills Village.
Boulder & North: Boulder, Longmont, Louisville, Lafayette, Erie, Superior.
Not sure if you're in our service area? Just give us a call.
Same-Day Water Heater Replacement Available
A failed water heater on a weekday morning doesn't have to mean a week of cold showers. Call by early afternoon and we can usually have a new unit installed before bedtime. 303-253-7246
Frequently Asked Questions About Water Heaters
How much does it cost to install a tankless water heater in Colorado?
A tankless water heater installation in Colorado typically ranges from $3,500 to $7,500 fully installed, depending on whether you need gas line upgrades, new venting, condensate management, and electrical work. We provide free written quotes after a brief site assessment.
How long do tankless water heaters last?
Tankless water heaters typically last 18 to 25 years with proper maintenance, compared to 8 to 12 years for traditional tank water heaters. Annual descaling is essential in Colorado due to hard water.
Are tankless water heaters worth it in Colorado?
For most Colorado homeowners staying long-term, tankless is worth the investment. You get endless hot water, 20-30% energy savings, double the lifespan, and significant space savings. The higher upfront cost typically pays back over the unit's lifespan through energy savings and avoided replacements.
How do I know if my water heater needs to be replaced?
Watch for: rust-tinted hot water, rumbling or popping sounds, water pooling at the base, hot water running out faster, age over 10-12 years for tank models, or repeated tankless error codes. We offer free assessments to help you decide between repair and replacement.
Can you install a tankless water heater the same day?
Same-day tankless installation is sometimes possible if no major gas, venting, or electrical upgrades are needed. Most tankless conversions take one full day. Tank-to-tank replacements are routinely completed in 3-5 hours and we often do them same-day.
Do you need a permit to replace a water heater in Colorado?
Yes, most Colorado jurisdictions require a permit for water heater replacement, especially for gas units. We identify required permits and inspections in the installation scope and coordinate them as part of the job.
Tankless vs tank water heater — which is better?
Tank water heaters cost less upfront, are simpler to install, and work well for predictable hot water demand. Tankless water heaters cost more initially but provide endless hot water, save 20-30% on energy, last twice as long, and free up floor space. The right choice depends on household size, hot water usage patterns, fuel availability, and how long you'll stay in the home.
Why is my water heater making noise?
Rumbling or popping noises usually mean sediment has built up on the bottom of the tank. The water trapped under sediment boils, creating the noise and reducing efficiency. A flush often resolves it; if the tank is older, replacement may be more cost-effective than continued maintenance.
How often should I flush my water heater?
Tank water heaters should be flushed annually to remove sediment buildup, especially in Colorado's hard water areas. Tankless water heaters need annual descaling to prevent scale from coating the heat exchanger. Both services are inexpensive and dramatically extend equipment life.
What size tankless water heater do I need?
Tankless sizing depends on your peak simultaneous hot water demand (showers, dishwasher, laundry running at once) and incoming water temperature. Colorado's cold winter groundwater requires more powerful units than warmer climates. We perform a load calculation and size your unit precisely — too small means cold showers, too large wastes money.