Built for mountain & desert homes
Frozen lines in Jackson and Flagstaff, hard water in St. George, high-altitude heaters in Durango — we know your climate.
Tankless Combi Boilers
Two appliances replaced by one on the wall
A combi boiler does the work of a heating boiler and a water heater in a single compact cabinet. Most of the time it circulates hot water through your floors or baseboards. Open a hot tap and it switches over, heating domestic water as it flows, so there’s no storage tank to keep warm around the clock and no tank to take up floor space. In a small mechanical room, a condo or a remodel, that freed-up corner is often the deciding factor.
It isn’t the right answer for every house. A big home with several showers running at once may be better served by a boiler with an indirect tank or a separate tankless water heater, and we’ll say so. Combi installs, conversions and service are offered by our Durango & Southwest Colorado team, which also checks gas supply and venting on every job.
- Frees Up Space One wall-hung unit where a boiler and tank used to sit.
- Endless Hot Water Heated as it flows, with no tank to run dry.
- One Yearly Service A single visit covers both your heat and hot water.
Good Fit?
Reasons to consider a combi
Combis make the most sense when one or more of these describes your home.
-
Boiler and Tank Both Aging
Replacing two old appliances at once is the natural time to combine them.
-
A Cramped Mechanical Room
No space for a boiler, a storage tank and room to service them.
-
Running Out of Hot Water
A tank that empties halfway through the second shower.
-
Paying for Standby Heat
Standby heat loss from a tank that sits warm all day and night.
-
A Remodel Underway
Walls and floors already open make a conversion simpler.
-
A Condo or Townhome
Moderate hot-water use and limited space suit a combi well.
What We Do
Everything a combi boiler needs
Sized for your heating load and your household’s hot-water use.
- New Combi Installs Wall-hung units sized for both heating and domestic hot water.
- Tank-To-Combi Conversions An old boiler and storage tank swapped for a single wall unit.
- Combi Repair No heat, no hot water, pressure loss and error codes diagnosed.
- Descaling & Flushing Yearly flushing that protects the heat exchanger from hard water.
- Gas & Venting Upgrades Supply lines and venting checked and upgraded where the combi needs it.
- Outdoor Reset & Controls Smart controls that adjust water temperature to the weather.
How It Works
Combi boiler vs. tankless water heater: which fits your home?
A tankless water heater only makes hot water; a combi also runs your heating. Sizing is the step that decides whether one unit can do both well.
-
Count the Demand
Heating load plus how many fixtures run hot water at once.
-
Check Gas and Venting
We confirm the gas supply and vent path can serve the new unit.
-
Free Estimate
Combi and alternative setups priced side by side.
-
Install and Tune
Mounted, piped, combustion set for altitude and both modes tested.
Local crews. Mountain-tough service.
Local in five communities
Real offices and crews in St. George, Hurricane, Durango, Jackson and Flagstaff — not a call center.
Award-winning work
Voted Best of Southern Utah Gold in 2025 and 2026, and Best of Iron County 2025.
Here 24/7
Burst pipe at 2 a.m. or no heat on a Sunday — a real technician answers the call.
Short on space and hot water?
Get a free combi boiler estimate from our Durango team.
Maintenance Membership
Ready for desert summers & mountain winters.
Seasonal checkups for every system in your home.
Seasonal checkups catch small problems before they become emergencies — and keep your systems running efficiently all year.
- Annual whole-home plumbing inspection
- Water heater flush & safety check
- Seasonal heating & AC tune-ups (St. George & Hurricane)
- Priority scheduling for members
- Member savings on repairs
Combi boiler questions
Will a combi give me enough hot water?
For most small and mid-size homes, yes. A combi heats water as it flows, so it won’t run out, but it can only heat so many gallons a minute. Two showers and a dishwasher at the same moment may push a smaller unit past its limit. We size it from your actual fixtures to avoid that.
Does hard water affect a combi boiler?
Yes. Minerals settle on the domestic hot-water heat exchanger, cutting output and shortening its life. A yearly flush and descale keeps it working, and in homes with very hard water a water softener ahead of the combi adds a good layer of protection.
Can I switch from a tank water heater to a combi?
If your home heats with a boiler, usually yes. The conversion removes the tank, mounts the combi on a wall and connects it to both the heating loops and the domestic water lines. Some homes need a larger gas line or new venting, which we check during the free estimate. We’ll also tell you if your hot-water use is better suited to keeping a tank.
What if my home is larger?
For bigger homes with high hot-water demand, a standard boiler with an indirect storage tank often performs better, since the tank holds a reserve for busy mornings. We’ll explain the tradeoffs and price whichever setup actually fits the house. Sometimes a boiler paired with a separate tankless water heater is the better middle ground.
Where does Element install combi boilers?
Tankless combi boilers are installed and serviced by our Durango location, from Durango and Bayfield to Pagosa Springs. If you’re near Flagstaff, St. George or Jackson and just want endless hot water, every Element location installs tankless water heaters, each sized for the elevation and the hard water it will face.
What affects the cost of a combi install?
The unit’s output, whether it’s a straight swap or a conversion from a boiler and separate tank, the gas line and venting changes it needs, and how many heating zones connect to it. Condensing models also need a condensate drain. We size it from your heating load and fixtures, then give you a written, upfront price with the alternative setups beside it. Estimates are free and financing is available.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.