How Much Does a 5-Ton HVAC System Cost to Install? Real Prices for LA & Glendale Homes

A contractor tells you your home needs “5 tons” of cooling, and your first honest reaction might be: tons of what, exactly? It’s not a weight measurement — a 5-ton HVAC system delivers 60,000 BTU of cooling capacity per hour, the output typically matched to a home in the 2,600 to 3,200 square foot range. A 5 ton HVAC replacement cost typically runs $8,000 to $25,000 depending on scope, and what determines where you land in that range is less about tonnage and more about exactly what’s being replaced.

Is a 5-Ton System Actually Right for Your Home?

Before pricing anything, it’s worth confirming 5 tons is the correct size — oversizing a system this large gets expensive fast, both upfront and in ongoing short-cycling wear.

A 5-ton system is generally the right fit for a 2,600–3,200 square foot home — a range two independent national sources (Today’s Homeowner and This Old House) arrive at consistently, which lends it real credibility as a starting benchmark. But square footage alone doesn’t finalize the number: ceiling height, window area and sun exposure, and insulation quality all shift the real requirement up or down from what a square-footage chart alone would suggest.

Home Size → Recommended Tonnage

Treat this table as a starting point for the conversation, not a final answer — a professional Manual J load calculation, the industry-standard method defined by the Air Conditioning Contractors of America (ACCA), accounts for your home’s specific characteristics rather than relying on square footage alone.

For larger homes — particularly two-story layouts — it’s also worth asking whether one 5-ton system is even the right approach. Two smaller systems (one serving the upper floor, one the lower) often outperform a single large unit: independent zone control means better temperature consistency between floors, and if one system needs repair, the other keeps running rather than leaving the whole house without cooling. This is a conversation worth having with a specialist at the planning stage, before equipment is purchased — retrofitting a single large system into a two-zone setup later is a far more expensive change than deciding upfront.

What You’ll Actually Pay, by Scenario

A complete 5-ton system replacement — new AC paired with a new furnace or air handler — typically costs $11,000 to $25,000 installed, while replacing only the outdoor AC unit and keeping the existing furnace runs considerably less, around $6,000 to $12,000. That wide spread exists because “5-ton system” can describe genuinely different projects: a straightforward condenser swap on one end, a full installation with new ductwork and electrical work on the other. National data backs up both ends of this range — Today’s Homeowner puts the average installed cost around $16,312, while This Old House reports roughly $17,927 for equipment alone plus about $2,472 in installation labor for a complete system.

5-Ton HVAC System Cost — By Scenario

Where the Money Actually Goes

The headline numbers above are really three separate cost categories stacked together, plus a few line items most budgets leave out entirely.

Equipment typically averages around $13,000 for a complete 5-ton system, though it ranges from roughly $3,800 to $32,500 depending on brand and efficiency tier — the single biggest swing factor in the entire project. Labor averages around $3,000, with a realistic range of $2,000 to $6,700 depending on site accessibility and how far the refrigerant lines need to run. Ductwork modifications are the wild card: if your existing ducts aren’t sized for 5-ton airflow, expect $3,000 to $6,000 in additional cost; if there’s no existing ductwork at all, that figure jumps to $7,000 to $15,000.

Additional Costs Frequently Left Out of the Budget:

• New thermostat: 40–220
• Electrical panel upgrade (if required): 1,200–2,000
• Zoning system: 1,500–8,500
• Permit fees: 250–400
• Whole-home air purifier: 420–5,000

None of these are padding — they’re common enough on 5-ton installations that it’s worth asking upfront whether a quote includes them or treats them as separate add-ons.

Efficiency tier is the second-biggest lever on price after system type. A higher SEER2 rating increases the upfront price but lowers ongoing electricity costs — worth taking seriously on a system this large, since it runs more hours and moves more air than a smaller unit, meaning efficiency differences compound faster.

5-Ton System Cost by SEER2 Rating (for a ~2,900–3,000 sq ft home, AC + gas furnace)

A rating of 15.2 SEER2 or higher is generally the threshold worth targeting — it’s commonly the minimum tier required to qualify for utility and manufacturer rebates, which can meaningfully offset the higher upfront equipment cost. Check current rebate programs at energystar.gov before finalizing a tier.

How Long the Install Actually Takes

Installing a 5-ton system typically takes 2 to 3 full working days, or roughly 16 to 24 labor hours — longer than a smaller residential system, due to the larger equipment itself, more extensive ductwork connections, and the electrical panel work larger systems sometimes require. Given that timeline, it’s worth scheduling installation ahead of time rather than during an active heat wave, when both contractor availability and your household’s tolerance for a multi-day project without AC are at their lowest.

What’s Different About This Market: Los Angeles and Glendale

Two region-specific factors shape 5-ton HVAC replacement cost here that national cost guides don’t account for.

First, California falls under the federal “South” region for SEER2 regulatory purposes, which carries a higher minimum efficiency standard — 14.3 SEER2 — than parts of the country still permitted to sell lower-rated equipment. Practically, that means the budget-tier systems still available in some other states simply aren’t an option for a new installation here; the real starting point for LA and Glendale homeowners is already above the national minimum floor.

Second, 5-ton systems show up more often in homes with larger lots in Pasadena, La Cañada, and Arcadia than in the compact historic bungalows common in central Los Angeles. In many of those older, smaller homes, existing ductwork was never sized for 5-ton airflow in the first place — which means retrofitting it adds a meaningful chunk to the project budget, exactly the ductwork cost range discussed earlier.

This applies across the communities we serve: Burbank, Glendale, Pasadena, Altadena, Arcadia, La Cañada, Sierra Madre, South Pasadena, Sunland, Tujunga, Eagle Rock, Highland Park, Glassell Park, and Los Angeles. Our HVAC replacement specialists in Glendale will check whether your current ductwork can actually support 5-ton capacity before quoting a final number.

How to Keep the Final Number Down

A few concrete strategies can meaningfully affect what you end up paying, without cutting corners on the equipment itself.

• Compare at least three quotes from licensed contractors using the same system specifications — SEER2 rating, brand tier, and scope of work — so you’re comparing like-for-like rather than apples to oranges.
• Check federal, state, and utility rebates for systems rated 15.2 SEER2 or higher; qualifying equipment can bring meaningful savings that partially offset the higher upfront tier cost discussed earlier.
• Schedule installation during the shoulder season — spring or fall — when contractor demand eases and both pricing and scheduling flexibility tend to improve.

If you’d like to compare configurations directly, request a few equipment options for AC replacement in Glendale to see how pricing shifts across different efficiency tiers for your specific home.

Get an Accurate Price for Your Home

The exact cost of your 5-ton HVAC replacement depends on what’s actually being replaced — AC only or the full system — the efficiency rating you choose, and the condition of your existing ductwork.

COLD CLOUD serves Los Angeles, Glendale, Burbank, Pasadena, Altadena, Arcadia, La Cañada, Sierra Madre, South Pasadena, Sunland, Tujunga, Eagle Rock, Highland Park, and Glassell Park. Reach out for a free assessment that includes a proper Manual J load calculation, so your final quote reflects what your home actually needs.

Standards & Sources:

• U.S. Department of Energy, SEER2 regional efficiency standards — energy.gov
• ENERGY STAR, HVAC equipment rebates and efficiency guidance — energystar.gov
• Air Conditioning Contractors of America (ACCA), Manual J residential load calculation standard — acca.org

Author Alex Butakov

Co-founder, CEO & Technical Director at COLD CLOUD, a Daikin Comfort Pro dealer and licensed C-20 and C-38 HVAC contractor serving Greater Los Angeles.