Tankless systems
Tankless water heater installation built around real flow demand
Tankless units heat water as it flows, so hot water doesn't run out. The catch is that the unit has to be sized to your flow rate, and the install often touches gas sizing, venting or electrical.

Why homeowners call us
What you get
Best for
Households that want continuous hot water and want their floor space back.
Pros
No standby losses, compact wall-mounted unit, continuous supply when sized correctly.
Considerations
Higher up-front cost, possible gas/venting/electrical upgrades, and descaling matters in hard water.
What the visit covers
- Flow-rate sizing based on simultaneous fixture use
- Gas line capacity and venting assessment before commitment
- Condensate handling for condensing models
- Isolation valves installed for future descaling
- Commissioning and temperature verification
How it works
- 1
Feasibility check
We confirm your gas, venting and electrical can support the unit.
- 2
Size for flow
We calculate gallons-per-minute at your incoming water temperature.
- 3
Install and commission
Mount, vent, connect, test and walk you through maintenance.
Real work, close to home
See the equipment and installation details
Original project photos from completed Hot Water Express jobs across the DMV.
Washington, DCDirect-vent water heater replacement in Northwest DC
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Temple Hills, MD40-gallon gas water heater and flue upgrade in Temple Hills
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Good to know
Frequently asked questions
Send three photos. Get a fast water-heater quote.
Show us the full heater, the model label and the vent or connections. Our team reviews the job and follows up with clear options.



