Cost To Install HVAC In Connecticut (2024 Prices)

Typical home size in Connecticut is around 2150 sq. ft., and with average insulation (13R walls & 38R ceiling), you will need an HVAC system size of about 42000 BTUs / 3.5 TONs *.

Professional installation of a 16 SEER HVAC System in CT costs between $6,051 and $7,294, which includes labor & materials. A 16 HVAC system provides the best combination of price, value and ROI.

Your Central AC can be a single unit or (if over 5 TONs) a combination of multiple smaller units, & you can use a conventional Central AC or a Central Heat Pump.

Adjust your home size & electric cost, to see numbers tailored to you:

The state of Connecticut is located in Climate Region #2, which means it has average summer temperatures, compared with other 49 states.

Average summer daytime temperature in CT is around 84.4 °F, which requires an average size HVAC system for your home.

This guide is based around a Central HVAC system, which cannot be truly zoned (unlike Mini Splits).

How Much Does HVAC System Cost in Connecticut?

HVAC Contractors in Connecticut typically charge around $4,796 to $5,781 to install a 3.5 Ton standard efficiency 14 SEER Central AC, of which $3,008 is the cost of materials, excluding refrigerant (freon). A 14 SEER Central AC will consume roughly 3841 kWhs of electricity during a summer cooling season.

A more advanced 16 SEER Central AC (3.5 Ton), which usually has a 2-stage compressor and is more efficient. Installation cost of a 16 SEER HVAC unit in CT is around $6,051 to $7,294, with materials costing around $3,757.

16 SEER models are more efficient than 14 SEER, and should consume around 3404 kWhs of electricity for the season. A 16 SEER Air Conditioned may be either a conventional AC or a Heat Pump variant - the power consumption & efficiency will not change.

Costs Difference between CT urban areas, and the rest of the state:

Typically, you can expect to HVAC costs to be lower in smaller towns, and higher in urban areas. Largest cities in Connecticut are:

- Bridgeport (population 148,457)
- Stamford (population 137,566)
- New Haven (population 137,339)
- Hartford (population 119,817)

If you live in one of these larg(er) cities (Bridgeport, Stamford, New Haven, & Hartford), your installations cost, is likely to be 3-5% higher than in the rest of the state, or $6,293 to $7,586 for a 16 SEER central AC.

In smaller towns, you can expect about 2-3% discount, or $5,870 to $7,075 for the same for a 16 SEER unit.

High Efficiency Central Air Unit Cost (18+ SEER)

The most efficient models of Central AC start at 18 SEER, and are almost always a Heat Pump variant. A 3.5 Ton Central Air unit installation will cost around $9,788 to $11,799 in Connecticut, and it will consume 3065 kWhs of power during a summer cooling season.

If you are a resident of Bridgeport, Stamford, New Haven, or Hartford, you can expect to pay a slight premium for an 18 SEER system, and your cost will be around $10,179 to $12,271.

Finally, 20+ SEER central air conditioners are always Heat Pumps, are fairly rare due to their very high relative cost, and long ROI. A 3.5 ton Central AC / Heat Pump with 20 SEER rating will usually cost $13,181 to $15,889.

However, higher end models (specifically Lennox Heat Pumps) but can run as high as $19,340 for a Lennon XP20 Heat Pump, and upward of $25,500 for Lennox SL25XPV (25 Seer) Heat Pump, which can also heat in temperatures as low as -13 °F.

Fun HVAC Fact: Lennox has a "sister brand" - Armstrong, which in most cases is has identical HVAC systems, with same specs and warranty, but priced 20-30% less than Lennox. Essentially by installing Armstrong HVAC system you get a Lennox for much less.

20 SEER AC / Heat Pumps will use around 2793 kWhs of electricity, making it 57% more efficient than a 14 SEER HVAC unit, and 116% more efficient than older 9 SEER AC.

These 20 SEER heat pumps are them some of the most efficient, commercially available residential HVAC systems! However, the upfront cost makes them not the best value.

How local climate affects size of your AC, and electrical costs:

Summers temperatures in CT (which is located in Climate Zone 2) average 84.4 °F, are generally mild, and require normal AC run times, of about 10.3 hours per day. Your estimated cost of running your AC is around $1043/year, for a 16 SEER system. See Climate Zone/Region map below:

For most homeowners in CT, a 16 SEER Central HVAC unit will be the best balance of price and energy efficiency, and yield an average ROI of 4.6 years, when upgrading from an old 9 SEER HVAC system. Let's take a deeper look and energy savings and ROI in the next section, and hou you can reduce your energy costs.

Below we will look at different SEER ratings, and cost savings, which you can expect by upgrading your HVAC system, as well as ROI, or how long your new Central Air unit will take to pay for itself in energy savings in Connecticut.

Which Central AC in CT is best for you (upfront cost & ROI)?

In regards to cooling your home, an old 9 SEER AC will do the same job as the most modern 24 SEER heat pump. The main differnece is in mow much it will cost you to run your AC. There is of course some small "comfort" differences, where 24 SEER ac runs smoothly, and 9 SEER unit will have on/off cycles, but they both provide equal amount of cooling.

For example, a 9 SEER would cost $1847 to run for a year, vs $731 to run a 24 SEER heat pump. That's a difference of $1116 per year!

The electric rate in Connecticut is $0.307 / kWh ( 84% higher than than national average of $0.167/kWh ).

Cost of electricity in CT is rising by about 5.96 % / year over last 10 years, and by year 2034, is expected to go up, to around $0.55/kWh ($1,861/year for a 16 SEER AC), based on historic electricity inflation in Connecticut.

Projected electric cost inflation in CT over next 10 years (cost to run 9-20 SEER AC)

Assuming you already have a 16 SEER AC, your total energy usage for Cooling will be around 3404 kWhs , you can expect to pay around $1043 / year to cool your home.

If you have a 9 SEER HVAC system, you are currently paying around $1,847 / year. and power usage close to 6025 kWhs

Our "Price-Value-ROI Model" shows that for a 2150 sq. ft. home in CT, a 16 SEER HVAC system, which uses 44% less power than a 9 SEER unit, and offers the best price / value / ROI ratio.

Thus, upgrading from 9 SEER to 16 SEER system, it will pay for itself in 4.6 years.

Connecticut HVAC Prices, Energy Costs & 10 year ROI: 9 vs 14/16/18/20 SEER

See table above for comparison of ROI, Annual Energy Savings and Cost of Electricity. Best price/value unit is marked in green.

What is SEER Rating, and How it Affects AC Efficiency?

SEER, which stands for Seasonal Energy Efficiency Rating is a measuremnt of how much electricity your AC will use to cool your house. SEER can be caluclated as follows:

SEER = BTUs / WATTs

The higher the SEER rating, the less electricity your AC will use.

BTUs is the cooling capacity of your AC, which can also be represented in 'TONs'. 1 TON = 12000 BTUs. A typical central AC size is 36000 BTUs or 3 Tons.

If you know your AC's Cooling capacity and the SEER rating, you can calculate approximately how much power it will draw at 100% load. Here is the formula:

BTUs / SEER = WATTs

So if we take our average sized 3 Ton AC (36000 BTUs), with 16 SEER rating we can caluclate it's power draw.

WATTs = 36000 / 16 = 2250 WATTs (2.25 kW)

From this simple formula, you can see that at max load, your 3 Ton AC will use about 2250 Watts or 2.25 kW.

Note: this number is only for the AC compressor. Total power will be slightly higher, becuase you also have the blower motor that pushes cool air through the ducts. The blower motor on modern AC will use about 300 watts when running at full speed. Therefore total power draw for a 3 Ton 16 SEER AC will be around 2.55 kW.

Here is an HVAC sizing table, based on home size and your Climate Zone (CT is in Zone #2):

Note: sizes in the table above are for information only. When installing new HVAC system, we recommend that your HVAC Contractor do a Manual J heat load calulation, to size your HVAC system properly.

How much electricity will my AC use per month?

This will depend on where you live (local temperatures) and your usage patterns. Basically you take power draw, and multiply it by avearge number of hours per day, that your AC runs.

In Connecticut, the AC runs an average of 10.3 hours per day. Multiply it by 30 days, and your will get approximate Kilo Watt Hours (kWh) per months. In our case it will be 788 kWhs. And to go a little further, at current electic rate of $0.3065 / kWh, it will cost approxymately $242 / month, to cool your home with a 3 Ton HVAC system.

Benefits of Upgrading Your Old Central AC from 9 to 16 SEER:

If your Central AC is 15-20+ years old, most likely you have a 9 SEER system, which means you spend about $1,847 per year for cooling.

This is $804 (77%) more expensive compared to same size, but a a more efficient 16 SEER HVAC system.

If you upgrade your old 9 SEER to a 16 SEER HVAC or Heat Pump, your annual cooling cost will go down to an estimated $1043 / yr.

Finally, your new HVAC system should pay for itself in 4.6 years with just energy savings (adjusted for inflation).

Assuming the cost of electricity will continue to increase by 5.96% / year, by the year 2034, your annual electric bill for cooling is expected to be $1,861/yr.

If you upgrade your old 9 Seer system to a new 16 Seer system, over next 10 years, your total savings will be close to $14,348 in energy costs (less $6,570 form the installation)!

If you have an older AC it makes sense to upgrade your AC system to a higher SEER (more efficient) Central AC unit such as 14 or even 16 SEER, if your house is around 2000 sq. ft.

For larger homes (3000 sq. ft and up), in Climate Zone 4 & 5, where electric costs are above $0.20 / kWh, it may advisable to upgrade even to an 18 SEER unit, as extra energy savings, will reduce your ROI period.

If you upgrade from 9 SEER to 16 SEER, the cost will be around $6,577 as your ROI or payback will be 8.2 years.

However, if currently you have a 14 SEER AC, it does not make financial sense to upgrade your AC system to a higher SEER (more efficient) Central AC unit such as 18 SEER, as the price difference is $5,426, and your ROI or payback will be 12.8 years, adjusted for inflation and 5.96% annual increase in cost of electricity in CT.

Installing New HVAC in Connecticut - which SEER Rating to choose?

As you can see in the costs / value table below, in most cases, over a 10 year period, a 16 SEER HVAC system will provide the best value for the price in Connecticut.

This table compares 4 different models of 42000 Btu HVAC systems - 14, 16, 18 and 20 SEER. The base line is 14 SEER model, and more efficient units are compared to it based on initial cost, energy savings in the 1st year, as well as 10 year energy saving, and total ROI period.

Both are adjusted for electric cost inflation (5.96%) in Connecticut for a , compounded over last 10 years (we expect the same electric rate increases going forward, as that is the best we have).

Connecticut HVAC Prices, Energy Costs & 10 year ROI: 14 vs 16/18/20 SEER

As you can see 16 SEER offers the best value for the money in CT, and will have the shortest ROI period of 5.7 years.

* HVAC System Sizing & Pricing Our numbers are for general information only. When installing a new HVAC system, we recommend that you or your HVAC Contractor always perform a Manual J heat load calculation as well as ductwork suitability assessment, specific to your home. HVAC Prices prices, energy costs and savings are provided for reference only, are based on many factors, and may change at any time.