Fossil Creek and Southridge sit in south Fort Collins, south of Harmony Road, centred on South Lemay Avenue, Southridge Greens Boulevard and Trilby Road. Southridge Greens is a 1980s to early-1990s golf-course community — overwhelmingly homes built from 1985 to 1993, many on or near the golf course — and it is the oldest large south-side cohort in the city. That makes this a replacement market, not a new-build market: the original furnaces and air conditioners are long gone, and the work now is replacement quality, ductwork and heat-pump conversion.
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Southridge and Fossil Creek call for replacement work done properly — heat pumps on larger two-storey homes, furnaces sized to the ductwork, and duct sealing where 35-year-old ducts are leaking.
Larger two-storey homes with existing ductwork are strong heat-pump-conversion candidates. As of November 2026, Xcel offers $1,500 per heating ton for cold-climate heat pumps (from 1 October 2026) and Colorado offers a $1,000 state heat-pump tax credit — amounts change, so check before you plan around them.
View details ↗02A 1985–93 home is on its second or third furnace. Since 1 January 2026, Colorado's HB23-1161 rule means new furnaces must meet the ultra-low-NOx standard of 14 ng/J or less — a condensing unit with PVC venting and a condensate drain.
View details ↗03Thirty-five-year-old ductwork leaks. We test with a duct leakage tester, then seal joints with mastic — often the highest-return step before a new system goes in, because a new furnace cannot fix air that never reaches the room.
View details ↗04New AC in a Southridge home means sizing for the house, not the square footage alone. We run a Manual J load calculation at altitude — 5,003 feet cuts AC capacity roughly 10–20% against sea-level ratings — and verify the ductwork can carry the airflow.
View details ↗Golf-course frontage, mature trees, sloped lots and 35-year-old ductwork. The work here is replacement quality, not first-time installation.
The original furnace and AC in a 1986 Southridge home are long gone. What is in the house now is usually a 2000s replacement — and some of those were oversized, which short-cycles, wastes energy and never dehumidifies properly.
We size by Manual J at altitude and test the ductwork before we quote. A right-sized system that runs longer and steadier beats a bigger box that cycles on and off.
Book a visit →Ductwork installed in the 1980s has had 35 years of thermal cycling, and joints open up. Leaking ducts dump heated or cooled air into attics and crawlspaces, and they pull in dust and insulation fibres.
We test with a duct leakage tester so the number is measured, not guessed, then seal with mastic and re-test. In a two-storey home, sealing is often what finally evens out the upstairs.
Book a visit →The Front Nine condos (1986–88) and Miramont Village patio homes have small lots, shared walls and very little outdoor space for a condenser. A standard split system does not always fit.
Compact outdoor units and ductless mini-splits are the practical answer here — but exterior equipment is governed by the HOA, so check your HOA covenants before we move or replace a unit.
Book a visit →01Furnace and AC both past 20 years
02Upstairs hot while the downstairs is fine
03Dust and debris clogging the outdoor condenser
04Rising energy use on the same system
05Rooms at the end of long duct runs that barely blow air
The golf course, the park and the reservoir are the three anchors of this area. Tell us which one you are near when you book and the technician will find the street.
The golf course defines the neighbourhood — Southridge Greens Boulevard snakes through it, and many homes back directly onto a fairway.
One of the largest community parks in the city, across Lemay from the golf course, with a dog park, splash park, skate park and reservoir loop trail.
The reservoir and its natural area anchor the south side of the area plan, with open lands preserved around the water.
The trail runs through the area and is a useful reference for the streets on the eastern and southern edges, near Paragon Point.
The area sits south of Harmony Road, centred on South Lemay Avenue, Southridge Greens Boulevard and Trilby Road, in ZIP 80525. Southridge Greens is bordered by Oakridge Village, Willow Springs, Linden Park, Paragon Point, Brittany Knolls and Miramont. Fossil Creek Community Park sits across Lemay from Southridge Golf Course. If your address is in that pocket, it is on our Fossil Creek route.
Southridge Greens · Miramont Village · Willow Springs · Paragon Point · Village at Southridge
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Call (970) 932-2324 →A typical AC lasts 15 to 20 years, and a furnace 20 to 25. A Southridge home built in 1985–93 is therefore on its second or third system — which is why the conversation here is about replacement quality and ductwork, not about whether the original equipment is still running.
The Southridge Greens HOA exists, and Miramont Village has its own HOA covering exterior maintenance. Whether either restricts condenser placement or screening is not verified in our sources — check your HOA covenants before moving or replacing exterior equipment, and we will work within whatever they say.
Yes, where the ductwork is sound. A cold-climate heat pump heats and cools from one outdoor unit, and larger two-storey homes with existing ducts are strong conversion candidates. As of November 2026, Xcel offers $1,500 per heating ton for cold-climate heat pumps and Colorado offers a $1,000 state heat-pump tax credit — amounts change.
Usually a combination of duct leakage, unbalanced airflow and a system sized for the downstairs. We test duct leakage and static pressure, then fix the distribution — sealing, balancing, and zoning through thermostat and ventilation controls — before recommending a bigger system.
Yes. The Front Nine condos and Miramont Village patio homes are a regular part of this route. Compact outdoor units and ductless mini-splits suit the limited outdoor space, and we confirm HOA rules on exterior equipment before we start.
No heat, no cooling, or a system that has never kept the upstairs comfortable. Call DNA Refrigeration Heating & Cooling at (970) 932-2324 — we are open 24 hours, 7 days a week.
Call (970) 932-2324 and tell us what you are seeing and where you are located — we will confirm the right appointment type and timing on the call.