Tank, tankless, gas, and electric. We size the unit, pull the Denver permit, install to code, and haul the old one away — with a written price agreed before we start.
House Bill 23-1161 is now active. It does not require you to replace a working water heater — but it does change what you can buy when yours fails, and what it costs.
Any new gas water heater sold or installed in Colorado must meet Ultra Low NOx emission limits or be certified to current ENERGY STAR standards.
Units up to 75,000 BTU/hr must emit no more than 10 ng/J of NOx. Units from 75,000 to 2 million BTU/hr must stay under 14 ng/J.
Pre-2026 stock can still be installed while it lasts. As it sells through, expect narrower size choices, longer lead times, and higher equipment cost.
Electric water heaters and heat pump units are not covered by the NOx rules, which is why more Denver homeowners are now asking about them.
Compliant models exist today. Bradford White offers ULN-compliant residential tank units, and Navien and Lochinvar offer compliant high-efficiency tankless models. If your unit is over 10 years old, planning the swap now beats making the decision on the morning it fails.
Water heater installation in Denver, CO generally runs $800 to $3,000 or more, depending on whether you are swapping a like-for-like tank or converting to tankless, plus fuel type, capacity, and any venting or expansion tank work needed to meet Denver code. Every job is quoted in writing on site before work begins.
When a water heater reaches the end of its life, waiting for a full failure is the expensive option. Whether you are upgrading a tired 10-year-old tank, replacing a leaking unit, or moving to endless hot water with a tankless system, Grig Plumbing handles Denver water heater installation from sizing through final inspection.
We help you choose the right capacity and efficiency rating, remove and recycle the old unit, install to current Denver code, and pull the permit. Already know your heater can be saved? See our water heater repair service in Denver instead.
Minor faults are worth repairing. Pouring money into a failing tank is not. These are the signals that tip the decision toward replacement.
| Warning sign | What it means | What to do |
|---|---|---|
| Unit is 8–12+ years old | Standard tanks are engineered for roughly a 10-year service life. | Plan the replacement before catastrophic tank failure. |
| Rust or discoloured hot water | The internal tank lining is degrading and corrosion has begun. | Replace — a corroded tank cannot be repaired. |
| Water pooling at the base | The storage tank itself has fractured. | Shut off the cold-water supply and call immediately. |
| Energy bills climbing | Sediment has insulated the burner or element, wasting fuel. | Upgrade to a high-efficiency tank or tankless unit. |
| Repeated repair calls | Repair costs are approaching half the price of a new unit. | Replace for reliability rather than repairing again. |
Not sure which side you fall on? We diagnose first and tell you honestly — a repair quote and a replacement quote, side by side.
The right choice depends on household size, hot water habits, available space, and how long you plan to stay. Here is the honest comparison.
Still the most common choice in Denver homes, thanks to the lowest upfront cost and the simplest swap. Stores 40, 50, or 80 gallons kept hot and ready.
Heats on demand through a high-output heat exchanger. Endless hot water, wall-mounted, and the longest service life — but it needs the right gas line and venting.
Pulls heat from surrounding air rather than burning gas. Exempt from the Ultra Low NOx rules and the most efficient option, but it needs adequate space and airflow.
Considering a heat pump unit? Talk to us first — suitability depends on your utility room volume, ambient temperature, and electrical capacity, and it is not the right answer for every Denver basement. Ask about federal and utility incentives, which change year to year.
Water heater installation in Denver typically falls between $800 and $3,000 or more. Where your job lands depends on six things:
Here is how we keep it honest. Send us photos of your current unit, its connections, and the space around it. We will give you a realistic range over text before anyone drives out. Then we confirm the exact figure in writing on site — and that number does not move mid-job.
We assess your peak hot water demand, fuel source, venting configuration, available space, and household size, then recommend the right capacity and efficiency rating — including which ULN-compliant models actually fit your setup.
One clear figure covering equipment, labour, permit, code upgrades, and disposal. You approve it before anything is ordered. No hourly creep, no surprise add-ons at the end.
We drain the old unit, safely disconnect the gas or electrical supply and water lines, and haul the tank away for proper recycling. Your utility room is left clear.
We set the new unit, fit the thermal expansion tank, T&P discharge piping and drain pan where required, run gas and venting to spec for Denver’s altitude, and make sure the install passes inspection first time.
We fill and fire the system, verify outlet temperature and combustion draft, test the safety shut-offs, then walk you through operation, flushing intervals, and what to watch for.
The Mile High City changes how a water heater has to be specified, vented, and protected. Getting this wrong is how a new unit fails early.
Lower air density changes combustion. Gas units need correct orifice sizing or high-altitude rating and properly sized venting, or you risk incomplete burn and carbon monoxide backdrafting into the home.
Denver code requires expansion control on closed systems. Most homes with a pressure-reducing valve on the main need one, or heated water has nowhere to expand and pressure spikes damage pipes and valves.
Front Range mineral content builds scale fast on tank floors and inside tankless heat exchangers. We spec the right anode rod and set you up with a realistic flushing schedule to protect the new unit.
Garik is a professional. Super kind and quality work. Explained everything and asked if I was happy with the results.
— Native HippyCame in 30 min to fix a emergency pipe leak. 10 out of 10 good solid people! Honest and trustworthy.
— Dave RiveraGarik was on time, excellent, and completed the job quickly. I would definitely recommend his work and his company.— Mark Sneden
Water heater installation in Denver generally runs $800 to $3,000 or more. A like-for-like 40 or 50 gallon tank swap sits at the lower end; a tankless conversion with new venting and gas line work sits at the top. Cost depends on system type, capacity, fuel source, venting changes, and required code upgrades. Grig Plumbing gives you a written quote on site before any work starts.
No. House Bill 23-1161 applies to equipment sold or installed after January 1, 2026. It does not require you to replace a water heater that is working safely. It only limits what you can buy when the time comes.
Generally yes. Ultra Low NOx units use more advanced combustion technology and carry higher manufacturing and certification costs. Pre-2026 stock can still be installed while it lasts, but as that inventory sells through, expect fewer size options, longer lead times, and higher equipment prices on gas units.
It depends on your space. Heat pump units are exempt from the NOx rules and are the cheapest to run, but they need adequate air volume, reasonable ambient temperature, and sufficient electrical capacity. They are a strong fit for some Denver basements and a poor fit for tight utility closets. Ask us to assess your space before committing.
A standard tank-to-tank replacement usually takes 2 to 4 hours. Converting from a storage tank to a wall-mounted tankless unit typically takes 4 to 8 hours because of gas line sizing, rerouting, and specialised venting.
Yes. The City and County of Denver require a plumbing permit and inspection for water heater replacements. Grig Plumbing pulls the permit and coordinates the inspection as part of the job, so your installation is documented and code-compliant for resale.
A typical 3 to 4 person household needs a 40 to 50 gallon gas tank, or a 50 to 66 gallon electric tank since electric units recover more slowly. Tankless sizing is based on peak flow rate in gallons per minute, calculated from how many showers and appliances run at once. We size it during the in-home assessment rather than guessing from square footage.
Yes. Removal, disconnection, and local recycling of the old unit are included in every installation quote.
New tank water heaters carry a manufacturer warranty on the tank and parts, typically ranging from 6 to 12 years depending on the model you choose. We will show you the exact manufacturer coverage for the unit you select before you approve the quote. Ask us about coverage on the installation work itself when we quote.
Often, yes — particularly on standard tank replacements where the unit is in stock. If your heater has failed completely or is leaking, call (983) 218-4929 and we will tell you honestly what we can do today.
Free estimate, written pricing, permit handled, old unit hauled away. Text us photos for a quick range, or call and we will come look.
