High-Efficiency Central AC Installation in Colorado
If your AC is over 10 years old, a modern 16+ SEER2 system can cut your summer electric bill 30-50%. That’s not a marketing number — that’s what the math actually shows for a 1990s-era 8 SEER unit vs. a 2026 16 SEER2 unit running through a Colorado summer.
Right Way installs central AC the way it should be done: full Manual J sizing, professional refrigerant line installation, vacuum-tested before charging, and full superheat/subcool commissioning. The cheapest installs in town skip half of those steps — that’s why their systems fail in year 5.
SEER2 Explained: What You’re Actually Buying
SEER2 (Seasonal Energy Efficiency Ratio 2) is the federal efficiency rating for cooling. Higher SEER2 = lower summer electric bills, full stop. The federal minimum for new central AC in the western U.S. is 14.3 SEER2 as of 2026. Modern units run 14 to 22+ SEER2.
Here’s what that actually means for your electric bill on a 3-ton system cooling a typical 2,000 sq ft Colorado home through a summer:
| Unit | SEER2 | Summer Cooling Cost | vs. 2010 Unit |
|---|---|---|---|
| 2010-era system (typical) | 10 | ~$540 | baseline |
| New federal minimum | 14.3 | ~$378 | 30% lower |
| Mid-tier high-efficiency | 16 | ~$338 | 37% lower |
| Premium / variable-speed | 20+ | ~$270 | 50% lower |
Estimates based on Colorado average electric rates and typical Denver-metro cooling hours. Your home will vary based on size, insulation, and usage.
Which SEER2 Tier Is Right for Your Home?
14.3 SEER2
Minimum / Budget
- Federal minimum
- Single-stage compressor
- No rebates available at this tier
- Good for short-hold rentals
16-17 SEER2
Sweet Spot
- Two-stage compressor
- Qualifies for full Xcel rebate
- Quieter, longer cycles, better humidity control
- Payback typically 4-6 years
20+ SEER2
Premium
- Inverter / variable-speed
- Maximum rebate tier
- Whisper-quiet operation
- Best comfort and humidity
- $1,500-$3,000 premium over mid-tier
Should You Install a Heat Pump Instead?
Worth Considering
If you’re replacing your AC and your furnace is also more than 10 years old, ask us about a cold-climate heat pump. The same unit replaces both your AC and most of your winter heating, qualifies for up to $6,750 in combined Xcel and Colorado state rebates if installed before September 30, 2026 (Xcel’s rate drops about a third on October 1), and runs cleaner and cheaper than straight gas heating for most Front Range homes. For many Colorado homeowners in 2026, this is the smartest HVAC upgrade available — full stop.
Brands We Install
Our Installation Process
Load Calc & Assessment
Manual J load calculation, ductwork inspection, electrical capacity check, refrigerant line evaluation.
Quote with Options
2-3 sized options at different SEER2 tiers. All rebates and tax credits applied. Heat pump option included.
Install Day
Old equipment removed and refrigerant recovered per EPA. New condenser, evaporator coil, line set, electrical, and pad.
Vacuum, Charge, Commission
Pressure test, deep vacuum, weighed-in refrigerant charge, superheat/subcool tuning, full test cycle. No shortcuts.
What “No Shortcuts” Actually Means
Half the AC installs in this market skip the vacuum step or the proper superheat/subcool tuning. Skipping the vacuum lets moisture and non-condensables into the system, which destroys the compressor over 3-5 years. Skipping the commissioning means the system never operates at peak efficiency. We do both. Every install. Documented in your post-install report.
Installation Cost Breakdown
| System Type | Installed Cost | After Rebates |
|---|---|---|
| 14.3 SEER2, single-stage (2.5-3 ton) | $4,200 – $5,800 | Same |
| 16 SEER2, two-stage (3 ton) | $5,500 – $7,500 | $3,500 – $5,500 |
| 18 SEER2, two-stage (3-4 ton) | $6,500 – $8,500 | $4,300 – $6,300 |
| 20+ SEER2, variable-speed (3-4 ton) | $8,000 – $11,000 | $5,800 – $8,800 |
Stacked Rebates & Tax Credits
A qualifying 16+ SEER2 central AC installation in Colorado can still claim a current Xcel Energy rebate. (The federal 25C tax credit that used to add to this stack expired December 31, 2025 — see our rebate tracker for what’s genuinely active.)
We confirm the exact current amount at quote time and file all paperwork for you.
Why Right Way for AC Installation
- Owner-operated. Shane is doing the work or supervising it. Not a stranger from a regional dispatch center.
- Manual J on every install. No rule-of-thumb sizing. We measure your home and calculate.
- EPA 608 certified. Federal requirement for anyone handling refrigerant. Confirm before any tech opens your system.
- Vacuum and commission every system. The two steps cheap installers skip that destroy your compressor.
- All rebates filed for you. We handle the paperwork. You don’t chase Xcel.
- Lifetime workmanship warranty. 10-year parts on most equipment. We stand behind every install.
Service Areas for AC Installation
We install across the west Denver metro, the foothills, and into the mountains. No travel fees for our standard service area.
Front Range
Wheat Ridge · Arvada · Denver · Lakewood · Westminster · Golden · Applewood · Edgewater
Foothills & Mountains
Evergreen · Conifer · Bergen Park · Genesee · Pine · Aspen Park · Bailey
Frequently Asked Questions
How do I know if my AC has a refrigerant leak?
The biggest tell-tale is reduced cooling — the AC runs but the air coming out of the vents isn’t as cold as it used to be. Refrigerant doesn’t get consumed during normal operation, so if your system is low, it’s because it’s leaking out somewhere.
Signs of a refrigerant leak
- Vents blowing warm or only slightly cool air while the system runs continuously
- Ice forming on the indoor evaporator coil or the copper line outside
- Hissing or bubbling sound from the indoor unit or refrigerant lines (rare but a clear sign)
- Higher electric bills — the system runs longer trying to keep up
- AC short-cycles or trips the breaker repeatedly
- Oily residue on copper refrigerant lines or fittings (refrigerant carries oil)
Why “Just Topping It Off” Is a Bad Idea
It’s also illegal under EPA rules without finding the leak first. Refrigerant is expensive ($75-$150/lb for R-410A, more for older R-22), and topping off a leaking system just wastes refrigerant and continues releasing it into the atmosphere. We always find and repair the leak first, then recharge to the manufacturer’s exact weight spec.
Common leak locations
- Schrader valve fittings (rubber gaskets degrade)
- Copper line solder joints
- Evaporator coil itself (formicary corrosion in 8-12 year old coils)
- Compressor connections
- Refrigerant lines that have been damaged (yard work, animals)
Refrigerant work requires EPA 608 certification — federal law. Every Right Way technician is certified. Schedule a refrigerant leak diagnostic →
Is it cheaper to leave the AC on all day or turn it off?
For most Colorado homes, the cheapest approach is a programmable or smart thermostat with a moderate setback (5-7°F warmer) while you’re at work — not “leaving it off” and not “leaving it running at the same temp all day.”
The myth: “It uses more energy to cool a warm house than to maintain a cool one”
This is partly true and mostly wrong. Yes, your AC works harder to bring a 90°F house back to 75°F than to maintain 75°F. But the total energy used is still less than running the AC all day. The science here is straightforward: heat transfer rate is proportional to the temperature difference between indoors and outdoors. A warmer house gains heat slower, so cumulative energy use is lower with a setback strategy.
Recommended Colorado AC strategy
- Home: 74-76°F during occupied hours
- Away: 80-82°F during work hours
- Sleeping: 72-74°F (most people sleep better slightly cooler)
- Use a smart thermostat with geofencing — it brings the house back to setpoint as you approach home, no waiting
Colorado Diurnal Swing Bonus
Colorado’s dry air means temperatures drop significantly overnight even after hot afternoons. Open windows when the outdoor temp drops below your indoor temp (usually by 9-10 PM) and let nature do the cooling. Close the house up in the morning before it heats back up. This trick alone can cut summer AC use 20-30%.
A modern smart thermostat with proper setbacks typically saves 8-15% on summer cooling costs compared to “set it and forget it” at one temperature. Many qualifying thermostats earn a $50-$100 instant Xcel rebate.
What size AC do I need for my Colorado home?
The right answer requires a Manual J load calculation — but as a rough guide, most Colorado homes need 20-30 BTUs of cooling per square foot. A 2,000 sq ft Wheat Ridge ranch typically needs a 2.5-3 ton AC; a 3,500 sq ft Evergreen mountain home might need 3.5-4 tons.
Why “tonnage” matters and what it means
HVAC tonnage doesn’t refer to weight — it’s a holdover from the days of ice. One ton of cooling = 12,000 BTU/hour of heat removal (the amount needed to melt one ton of ice over 24 hours). Residential ACs come in half-ton increments: 1.5, 2, 2.5, 3, 3.5, 4, and 5 ton.
The risks of guessing
Oversized AC
- Short-cycles (turns on/off fast)
- Doesn’t dehumidify properly
- Higher electric bills despite “bigger” capacity
- Premature compressor wear
Right-Sized AC
- Long, gentle cooling cycles
- Better humidity control
- Lower electric bills
- Equipment lasts longer
Undersized AC
- Can’t keep up on hot days
- Runs constantly
- Burns out faster
- Indoor humidity stays high
What Manual J considers
- Square footage and ceiling heights
- Window count, orientation, and glass type
- Insulation quality (R-value of walls, attic, basement)
- Air infiltration rate
- Internal heat gains (occupants, appliances, electronics)
- Local design conditions (Denver vs. Evergreen vs. Bailey)
We perform a full Manual J on every install quote — no charge, no obligation. It’s the only way to size right at Colorado altitude. Request a free AC quote →
When should I replace my AC instead of repairing it?
The traditional rule is the “5,000 rule”: multiply the repair cost by the age of the unit in years. If the result is over 5,000, replacement is usually the smarter spend. A $600 repair on a 10-year-old unit ($6,000) leans toward replacement; the same repair on a 4-year-old unit ($2,400) does not.
Strong replacement signals (almost always replace)
- R-22 refrigerant (Freon) — banned in the U.S. since 2020. Recharges cost $800+ when refrigerant is even available.
- Failed compressor — typically $1,800-$2,800 in a 10+ year old unit; a new system makes more sense
- System over 15 years old with any meaningful repair
- Multiple major repairs in the last 24 months — the system is telling you something
The decision in one table
Repair
- Under 10 years old
- Repair under $500
- R-410A or newer refrigerant
- SEER 14 or higher
- First major repair
Get Both Quotes
- 10-15 years old
- $500-$1,200 repair
- Energy bills creeping up
- Consider heat pump for rebates
Replace
- 15+ years old
- R-22 system
- Compressor failure
- Repair over $1,500
Modern 16+ SEER2 units cut summer electric costs 30-50% versus a 2010-era 13 SEER unit. Combined with a current Xcel rebate (confirmed at quote time), the payback on a replacement is often 4-6 years.
We’ll quote both repair and replacement honestly so you can make an informed call. See AC installation options →
Why does my AC keep freezing up?
An AC freezing up is almost always one of two things: restricted airflow or low refrigerant. Both prevent the evaporator coil from absorbing enough heat, which lets the coil drop below freezing and ice over. Once it’s frozen, the unit can’t cool — and continuing to run it can damage the compressor.
First Thing to Do
Turn the AC off at the thermostat. Set the fan to “on” (not auto) to circulate room-temp air over the coil and melt the ice — this can take 1-4 hours. Don’t run the AC until it’s fully thawed.
Airflow restrictions (most common)
- Severely clogged filter (replace it, immediately)
- Closed or blocked supply vents
- Dirty evaporator coil
- Failing blower motor or ECM not ramping up
- Collapsed or disconnected return ductwork
Low refrigerant
If your AC is freezing up but the filter is clean and airflow is normal, you likely have a refrigerant leak. Refrigerant doesn’t get “used up” — if you’re low, there’s a leak somewhere. EPA rules require us to find and repair the leak before recharging.
Other causes
- Outdoor temperature too cool (running AC when outdoor temp is below 60°F)
- Thermostat malfunction calling for cooling continuously
- Faulty TXV (thermostatic expansion valve)
If thawing it out and replacing the filter doesn’t solve the problem within one cycle, call us. Schedule AC repair or (303) 406-2717.