Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
ECO Window Systems Window Replacement: The Sunrise Owner’s Guide
We stock and install ECO Window Systems-compatible window replacement units across Sunrise, with typical installed pricing running $340-$780 per opening depending on series, glazing package, and whether the existing frame is retained or replaced. Most ECO Window Systems units we measure in the morning are ordered with same-day confirmation from the distributor, and standard sizes in the 100 and 400 series often ship within 48 hours. Homeowners usually discover the failure first as a draft they cannot locate, then notice the sash dropping on its own, or find water staining the drywall beneath the sill after a hard rain - the point where the weatherstrip has compressed past recovery or the balance system has lost tension.
Which ECO Window Systems Models This Applies To
ECO Window Systems organizes its residential line into series tiers that differ in frame depth, reinforcement, and hardware mounting patterns. The 100 series single-hung and horizontal roller units we remove most often in Sunrise were installed heavily from 2016 to 2021 in developments west of Nob Hill Road; these use a 2-5/8 inch frame depth and a specific balance shoe that is not interchangeable with the 400 series 3-1/4 inch frame. The 400 and 800 series share some sash hardware but differ in lock rail geometry, so a 400 series tilt latch will seat loosely in an 800 series stile and fail to engage.
To identify your unit, locate the etched marking on the glass spacer bar or the label inside the head jamb; the series prefix (ECO-1xx, ECO-4xx, ECO-8xx) tells us which hardware matrix to pull. We carry OEM ECO Window Systems balances, tilt latches, and weatherstrip on our Sunrise trucks, and where ECO has discontinued a part - the early 100 series constant-force balance spring is the most common - we source aftermarket equivalents from AmesburyTruth that match the original torque specification. Sightline Windows & Doors Sunrise is an independent service provider, not affiliated with ECO Window Systems.
The OEM-versus-aftermarket decision for ECO parts comes down to whether the original component was a wear item designed for replacement. Weatherstrip and balance springs are consumables; we use aftermarket with matching compression set and cycle ratings. Locking hardware and sash keepers we prefer OEM to maintain the original security rating and warranty chain.
Signs Your ECO Window Systems Window Replacement Is Failing

- Sash drops or will not stay open. The constant-force or block-and-tackle balance has lost spring tension or the cord has frayed. In Sunrise’s salt air, we see balance housing corrosion accelerate this by 30 to 40 percent compared to inland Broward County.
- Visible gap at the meeting rail when closed. The interlock weatherstrip has compressed below its design recovery, or the sash has sagged due to worn pivot bars. This gap is measurable with a feeler gauge and directly correlates to air infiltration.
- Condensation between glass panes. The insulated glass unit (IGU) seal has failed, allowing moist air into the airspace. In ECO units with warm-edge spacers, this typically appears first at the bottom corners where the PIB primary seal sees the most thermal cycling.
- Operation requires force or binds. The sash track has accumulated debris, or the frame has racked out of square. We check this with a diagonal measurement; anything over 1/4 inch across a 36 inch width means the replacement unit needs shimming, not just a new sash.
- Water intrusion at the sill or jamb. The exterior fin seal or sill dam has degraded, or the weep system is blocked. In Sunrise’s flat-grade lots with tight setbacks, splashback from hardscaping against the wall is a common accelerant we document on every survey.
Before
AfterReplacement Cost & What’s Included
| Component / Scope | Price Range (Installed) |
|---|---|
| Balance system replacement (single sash) | $180-$260 |
| IGU replacement (glass only, retain frame) | $340-$520 |
| Sash pack replacement (sash + balance, retain frame) | $420-$640 |
| Full unit replacement (frame-out, standard size) | $680-$1,140 |
| Full unit replacement (impact-rated, large format) | $1,180-$1,840 |
What drives the range: frame condition determines whether we can retain the existing buck and install a sash pack, or whether the full frame must come out and the rough opening be re-flashed. Impact-rated units carry a 20 to 35 percent premium over non-impact equivalents in the ECO line. Every replacement we quote in Sunrise includes the measured survey you keep, the written scope with line-item pricing, removal and disposal of the failed component, installation per ECO’s fastening schedule, and the documented photo record uploaded before we leave. The 365-Day Done Right Promise applies to every replacement; if the balance torque is wrong or the weep paths drain backward, we return and correct it under Haven Clause 5 - No surprises.
DIY or Call Us?

An owner can safely check whether the sash lock is fully engaging, clear visible weep holes with a pipe cleaner, and vacuum the sill track. These are maintenance, not repair. Where DIY goes wrong with ECO Window Systems units is in the balance replacement: the constant-force spring stores significant energy, and releasing the tension without a winding tool can damage the frame or cause injury. We have replaced sashes where the homeowner’s attempted balance repair bent the stile rail beyond salvage, converting a $240 balance job into a $600 sash pack.
IGU replacement requires a clean-room environment and butyl tape application we perform in our shop, not on-site; field-reglazed units fail at measurably higher rates in Florida’s humidity. For anything involving glass, frame removal, or hardware behind the sash stop, call (754) 254-5294 and we will measure, quote in writing, and schedule the repair.
FAQs
Balance systems typically cycle 10,000 to 15,000 times before tension loss; in Sunrise’s climate, that translates to 8 to 12 years for heavily used windows, with salt air accelerating corrosion on non-stainless hardware. IGUs carry a 10-year seal warranty from most fabricators, though we see field failures at 7 to 9 years in south-facing elevations with high thermal stress. Call (754) 254-5294 for an exact quote on your specific series and exposure - estimates are free.
Yes, if the frame is square and the failure is isolated to a balance, lock, or weatherstrip component. We repair rather than replace whenever the frame integrity supports it, which is roughly 60 percent of the ECO service calls we run in Sunrise. Call (754) 254-5294 for an exact quote - estimates are free.
A balance or hardware replacement on site takes 45 to 90 minutes per opening. A full frame-out replacement runs 3 to 5 hours including removal, rough opening prep, flashing, and finish trim. We schedule full replacements with a dedicated crew and do not combine them with other trades that day. Call (754) 254-5294 to schedule your free estimate.
We carry balances, tilt latches, locks, and weatherstrip for the 100, 400, and 800 series on our Sunrise trucks, and our shop holds common IGU sizes for same-day or next-day fabrication. Specialty hardware or discontinued series orders within 24 to 48 hours. Call (754) 254-5294 for an exact quote on your specific part - estimates are free.
Measure it right once, and the install tells you nothing went wrong. Sonia Raman still uses the Inverrary job she ran in 2017 as the reference point when our crew trains on sightline alignment in ECO Window Systems frames - the rough opening was 3/8 inch out of plumb, and the documented shim schedule we wrote before setting a single fastener is still in that file, photo-matched to the finished trim.
Written by Sonia Raman, Owner, Sightline Windows & Doors Sunrise at Sightline Windows & Doors Sunrise, serving Sunrise and nearby areas.










Before
After
Before
After
Before
After