Right-sized conversions for the original Fox and Jacobs housing off Memorial Drive, plus service for the newer Austin Ranch and Grandscape area.
Quick Answer
Frisco Tankless Water Heater Pros serves The Colony from our Frisco base, about 15 minutes southwest via the Sam Rayburn Tollway. The Colony's original 1970s and 1980s homes are compact, which means the right answer is often a smaller correctly sized unit or a point-of-use addition rather than the largest heater sold. Call (972) 430-9024.
The area
The Colony began as a single housing development. Fox and Jacobs started building on roughly 3,000 acres in 1973, the first twenty-seven families moved in during the fall of 1974, and the community incorporated in January 1977 as a planned residential development. Most of the original housing stock went up in the late 1970s and 1980s, with sustained building through the 1990s and 2000s adding multi-family units.
That original core is what makes The Colony distinctive among its neighbors. These are modest, efficiently planned single-family homes, generally smaller than anything being built in Prosper or Celina today, laid out on compact lots along streets like Memorial Drive and South Colony Boulevard. The city has grown to roughly 46,000 residents without erasing that first generation of housing.
Layered on top is a much newer city. Austin Ranch broke ground on its first phase in 1998 across roughly 1,900 acres of mixed office, retail and residential. Grandscape, the 400-plus-acre development anchored by Nebraska Furniture Mart along the SH 121 corridor, opened its anchor in 2015. Two vintages, one municipality, and two entirely different sets of water-heating decisions.
Local detail
In the original Fox and Jacobs housing, the honest advice is frequently to buy less heater, not more. A 1,600 square foot two-bath home does not have the simultaneous demand to justify a 199,000 BTU condensing unit, and the biggest unit on the shelf brings the biggest gas and venting bill with it. A properly sized mid-output unit covers the actual fixture load, costs less to install and is easier to fit into a compact utility space. We size against real fixture count and a 55 degree F winter rise rather than defaulting to the largest model.
Where a larger unit is justified, gas sizing is the gating issue. These homes were piped around a 40,000 BTU atmospheric tank, which typically means a half-inch branch. Upsizing to three-quarter inch is standard on any conversion to a high-output unit here, and in a compact home the run from the meter is at least short. Venting is the same story as everywhere in the older suburbs: the original B-vent cannot be reused for a condensing unit, so we run PVC, polypropylene or Category III stainless to a dedicated sealed termination and add a neutralizer for the acidic condensate.
Point-of-use is genuinely useful in The Colony in a way it is not in the newer cities. Original floor plans that later gained a converted garage bath, a bonus room or an added half bath end up with a long uninsulated run to a fixture used a few times a day. A small dedicated unit at that fixture solves it without touching the main system. On the newer side, the Austin Ranch and Grandscape-area properties are a different service profile altogether - multi-family and mixed-use buildings where units run harder and maintenance intervals follow usage rather than the calendar.
Why here: A compact 1970s or 1980s Fox and Jacobs home has two baths and modest simultaneous demand. A 199,000 BTU unit delivers capacity the house will never use while forcing maximum gas and venting cost.
What we do: We size against actual fixture count and a 55 degree F winter rise, which in much of the original build-out points to a correctly sized mid-output unit that installs more easily and costs less.
Why here: The Colony's original housing was piped for an atmospheric storage tank. Any high-output tankless conversion needs several times that gas volume and will drop out under full fire on the old branch.
What we do: We calculate whole-house connected load and upsize the branch to three-quarter inch, or select a lower-input unit where the fixture count genuinely does not require the larger appliance.
Why here: Homes of this era vent through metal B-vent, sometimes shared with the furnace. Condensing exhaust is cool and acidic at around pH 3, corrodes the flue internally and risks spillage into the living space.
What we do: We install a dedicated PVC, polypropylene or Category III stainless vent to a sealed termination, add a condensate neutralizer ahead of the drain and properly abandon the old flue.
Why here: Additions and converted spaces in the original housing sit at the end of a long uninsulated run from a utility closet that was never planned to serve them.
What we do: A small point-of-use tankless unit at that fixture delivers hot water almost immediately and avoids upsizing the whole-house system for one low-frequency draw.
Why here: Original floor plans allotted just enough space for a narrow atmospheric tank, and a wall-mounted condensing unit needs service clearance plus a compliant vent and condensate path.
What we do: We survey the space first and, where the closet will not work, relocate to an exterior wall or specify an outdoor-rated unit rather than forcing a non-compliant install.
Services
$2,900 to $5,800 for a complete conversion in Frisco
Swapping the appliance is the easy part. The gas line, the flue the furnace was sharing, and the house pressure are what make a conversion succeed or fail.
$450-$2,400 for most tankless gas line upgrades
A tankless unit can demand five times the gas of the tank it replaced. The pipe that fed the tank almost never carries it, and the failure is intermittent rather than obvious.
$450 to $1,200 installed per fixture in Frisco
A small unit under the sink that solves one specific problem: the fixture at the far end of the house that takes a minute to get warm.
$2,200-$4,800 installed for most Frisco replacements
Replacing a tankless unit that has reached the end of its life is a different job than a first-time install. We treat it that way.
$350-$1,800 for most tankless vent installations
Tankless units vent under positive pressure. That single fact rules out every B-vent flue in Frisco and decides which unit can go where.
Browse all tankless water heater services we offer in The Colony.
Capacity in a tankless appliance is not a fixed number, it is a rate that depends entirely on how much you are asking the water temperature to move. The governing relationship is gallons per minute equals BTU multiplied by efficiency, divided by the temperature rise multiplied by 500. Feed it a winter rise and it produces the number that actually matters, which is often a good deal smaller than the figure on the box.
Run the equation at a 55F rise and a 199,000 BTU condensing appliance produces close to 6.9 gallons per minute on paper. We design against 5.5 to 6.0 instead, because the nameplate assumes an ideal gas supply at sustained full fire and a specification with no margin becomes a complaint on the first cold morning. Run the same equation on a 120,000 BTU condensing appliance and the paper figure is about 4.1 gallons per minute, with a design figure a little under that. The question for a compact plan is whether the household will ever ask for the difference.
| Running at the same time | Approximate hot demand | What genuinely covers it |
|---|---|---|
| One shower | 1.5 to 2.0 GPM | Any residential gas tankless appliance |
| One shower and a lavatory | 2.3 to 3.2 GPM | A modest-output appliance, comfortably |
| One shower and the kitchen sink | 3.0 to 4.0 GPM | A modest-output appliance, within range |
| Two showers | 3.0 to 4.0 GPM | A modest-output appliance, within range |
| Two showers and the kitchen sink | 4.5 to 6.0 GPM | A high-output appliance, near its usable limit |
| Standard tub filling and one shower | 5.5 to 6.0 GPM | A high-output appliance, no margin left |
In a two-bath plan the bottom two rows describe events that either cannot happen or happen so rarely that specifying the whole system around them is poor value. That is the entire case for buying less appliance, and it is an arithmetic case rather than a sales one.
The instinct that a larger appliance is a safer choice is understandable and it is wrong in a specific, demonstrable way. Tankless appliances modulate, but only within a range, and below the bottom of that range they cannot reduce output further. They can only switch off and on again.
Put those two together and the picture for a small household is clear. A large appliance serving a plan whose typical draw is one lavatory or one shower spends most of its operating life at or beneath its floor, cycling to hold setpoint. That is more ignition events per year on an igniter with a finite number in it, worse temperature stability than a correctly matched smaller appliance would deliver, and precisely the behaviour people blame on tankless technology in general.
| Item | Consequence in a compact plan |
|---|---|
| Gas capacity | Roughly 199 CFH for the appliance alone, forcing the largest pipe scope |
| Vent diameter | Larger pipe through framing that was never generous |
| Closet clearance | A bigger cabinet in a space designed around a narrow atmospheric tank |
| Operating behaviour | More time below the turndown floor, more cycling |
| Comfort | A more noticeable cold water sandwich on short repeated draws |
| Capacity actually used | The top of the range is drawn on rarely, if at all |
A tall narrow closet sized around a draft-hood tank is not automatically a home for a wall-hung condensing appliance, even though the appliance is physically smaller. The tank needed floor area and a vertical flue. The new appliance needs wall area, a service envelope in front of it, a sealed vent route to a compliant termination, an electrical supply and a condensate path. Those are different requirements and they are not all satisfied by the space simply being big enough.
Where the closet genuinely cannot satisfy that list, the options are relocating to an exterior wall or specifying an outdoor-rated appliance. Neither is a compromise. An outdoor-rated unit removes the vent question entirely and frees the closet for storage, and in a mild-winter region it is a legitimate specification provided freeze protection is powered continuously and exposed piping is insulated.
A fixture that was added to a plan after it was built is nearly always at the end of a branch that nobody designed for it. The run is long, it is usually uninsulated, and the fixture is used a few times a day, which means the water in that branch is cold every single time. Enlarging the main appliance does not shorten the branch and therefore does not fix the complaint.
A dedicated appliance at the fixture does fix it, and the specification hinges entirely on whether gas is available at that location. Where it is, a small gas appliance handles a shower comfortably. Where it is not, the electric option has a hard ceiling set by its circuit, and that ceiling is lower than most people assume. A 240 volt, 30 amp appliance draws 7,200 watts, roughly 24,500 BTU per hour, which at a 55F rise is about 0.9 gallons per minute. That serves a handwash basin well and a shower not at all.
So the sequence is: establish whether gas can reach the location, then size against what the fixture actually needs, then decide. If neither a gas run nor an adequate electrical circuit is practical, insulating the existing branch and accepting the wait is sometimes the rational outcome, and we will say so rather than sell an appliance that will not satisfy the complaint. Permit requirements for adding an appliance or a gas run are set by the city with jurisdiction and confirmed before work starts. Call (972) 430-9024.
Serving The Colony and the rest of The Colony. For same-day help, call (972) 430-9024.
Frisco Tankless Water Heater Pros is based on Parkwood Boulevard in Frisco 75034, roughly 15 minutes from The Colony via the Sam Rayburn Tollway. We do not maintain an office in The Colony and will not imply one. The real advantage of a nearby crew over a national dispatcher is familiarity: a call from the original Fox and Jacobs streets gets a technician who already expects a compact floor plan, a half-inch gas branch and a tight utility closet, and who will tell you honestly if a smaller unit is the better buy. Call (972) 430-9024.
Often smaller than you have been quoted. Sizing is driven by simultaneous fixture demand at a 55 degree F winter temperature rise, not by square footage or by what fits the biggest budget. A compact two-bath home in the original build-out rarely runs more than one shower plus a sink at once, and a correctly sized mid-output unit covers that comfortably. Choosing the largest unit on the shelf typically forces a bigger gas upsize and a larger venting job for capacity the household will never draw. We count fixtures before recommending a model.
Often, but The Colony is the one place we regularly find the answer is smaller than people expect. These homes are compact, so the meter is usually close to the utility space, and pipe capacity is highest on short runs. That combination means the branch upsize is frequently a contained job rather than a whole-house repipe. It also means the binding constraint is often the meter rather than the pipe: once the furnace, range and dryer are totalled against the meter badge rating, there may be no headroom left regardless of what diameter we run to the heater. That is a utility conversation, not a plumbing one, and it is better to have it before the equipment is ordered. On a modest single-bath home the honest recommendation is sometimes a lower-input unit, which sidesteps the whole question.
Yes, and in The Colony that is frequently the smartest fix. Original floor plans that later gained a converted garage bath, a bonus room or an added half bath end up with a long uninsulated pipe run to a fixture used only a few times a day. A dedicated point-of-use unit at that location delivers hot water almost immediately without upsizing the whole-house system, the gas branch and the venting for one low-frequency draw. We check whether gas is available at the location, which usually determines whether a gas or electric point-of-use unit makes sense.
Yes. The Austin Ranch area and the mixed-use properties around the Grandscape and SH 121 corridor have a very different service profile from the original single-family streets. Those units see continuous high draw, so scale accumulates faster and maintenance intervals need to follow measured usage rather than a residential annual default. We install racked multi-unit systems with isolation valves so a single unit can be pulled for descaling without shutting down the building, and we keep service records that support the manufacturer warranty.
Background reading
General guides that apply to The Colony as much as anywhere else on North Texas municipal water.
Ownership · 11 min read
Twenty years is the number on the brochure. Frisco's water decides whether you get it. Here is what actually kills these units, which repairs make sense at which ages, and where the line is.
Cost & Value · 13 min read
Two identical units installed a mile apart in Frisco can differ by two thousand dollars. Almost none of that gap is the equipment. Here is where the money actually goes.
Water Quality · 11 min read
Scale does not build evenly. It builds on the hottest metal in the system, which is the one surface a tankless water heater cannot afford to insulate. Here is the mechanism, the timeline and the fix.
Nearby
Same trucks, same day. The Colony sits alongside these Denton County neighborhoods and cities.
Call (972) 430-9024 for installation, repair or descaling in The Colony. Open 24 hours a day, 7 days a week.
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Frisco, TX Tankless Pros