Discount Air Conditioner Deals

Good for cooling or heating a single room without ductwork, and WiFi control means you can adjust it from your phone instead of walking over to a wall unit. At $499.99, that's $80 off the $579.99 list price. Apply coupon code "E3RBGRS5" to save. Deal ends November 15.  Buy Now at Amazon

Works well for cooling and heating a single room like a bedroom or home office without ductwork, and the 18 SEER2 rating means lower energy use over time. At $399.99, that's $150 (27%) off the $549.99 list price. Apply coupon code "TJRX2E8K" to save. Deal ends November 17.  Buy Now at Amazon

Cooling a room or small living space without ductwork is the main draw here, and the 20 SEER2 rating means it'll run efficiently even on high-use days. At $899, that's $300 (25%) off the $1,199 list price. Apply coupon code "E93PZ649" to save. Deal ends November 15.  Buy Now at Amazon

This 12,000-BTU mini split system is $391.49 at Walmart.  That's a $59 low.  Shipping is free. Buy Now at Walmart

Keeping the exhaust hose covered helps block heat transfer and condensation drips, which matters if your portable AC sits in a finished room rather than a garage or basement. It's $4.71 (about 19%) off the $24.70 list price. Buy Now at Amazon

This control board suits anyone whose central AC unit has stopped responding properly and needs a direct replacement part rather than a full system repair call. It's a practical fix if you're comfortable handling the installation yourself and want to avoid paying a technician just to swap a single component. Buy Now at Newegg

Keeping a spare motherboard on hand makes sense if your AC's compressor control board fails and you're trying to avoid a full service call, especially once the unit is out of warranty and parts get harder to source. Newegg carries this specific model, which helps if you've already confirmed it matches your external unit's specs. Buy Now at Newegg

Swap these in on a quarterly schedule to keep your HVAC system running cleaner, and the MERV 11 rating traps smaller particles like pet dander and pollen without restricting airflow the way higher-rated filters can. The 4-pack covers a full year of changes, so you're not reordering every few months. Buy Now at Home Depot

Replacing a failed control board can save you the cost of a whole new unit, so this is worth having on hand if your air conditioner is acting up and the model matches your system. Newegg carries the 0011800197C for owners dealing with power or control issues rather than mechanical failures. Buy Now at Newegg

Folks managing nonstandard furnace sizes know how hard these filters can be to track down, and having three on hand means you're covered for a while without reordering. Buy Now at Home Depot

Swapping filters every month or two is the simplest way to keep your HVAC system running efficiently, and this 2-pack covers you for a while without another trip to Home Depot. Buy Now at Home Depot

Anyone with a furnace system sized for this non-standard 13" x 20" x 4" slot will want to keep a couple on hand, since MERV 8 filters catch everyday dust and pollen without restricting airflow the way higher-rated filters can. The 2-pack means you're not reordering every month if you're on a standard 90-day replacement schedule. Buy Now at Home Depot

Swapping filters every month or two is easier when you've already got a 5-pack on hand, and MERV 8 covers standard household dust and allergen filtering without restricting airflow. Home Depot has this size in stock if your system calls for 17" x 20" x 2". Buy Now at Home Depot

Anyone in a dry climate looking to cool a larger home without the electric bill a central AC unit brings should take a look at this, since evaporative coolers pull in fresh outside air instead of recirculating it. The down-draft design and 3,800 CFM output suit whole-house setups rather than single rooms. Buy Now at Home Depot

Worth grabbing if your HVAC unit takes this oddball 17x22x2 size, since it's a pain to find on short notice when your old filter wears out. MERV 8 handles everyday dust and pollen without restricting airflow the way higher-rated filters can. Buy Now at Home Depot

Homes with pets or allergy sufferers will notice the difference with a MERV 11 rating, which catches finer particles than the standard MERV 8 filters most HVAC systems ship with, and the 2-pack means you're not reordering again in a month. Buy Now at Home Depot

Keeping a spare on hand saves you from an AC repair call when the control board fails, especially if your unit's original is hard to source locally. It's a straightforward swap for anyone comfortable with basic appliance repair rather than hiring an HVAC tech. Buy Now at Newegg

Keeping an older AC unit running often comes down to replacing small components like this one instead of the whole system, and this drive board works with standard 5-wire fan motors across various brands. Newegg carries it for those handling their own HVAC repairs who need a direct replacement part on hand. Buy Now at Newegg

Works well for cooling a single room without the installation hassle of a window AC unit, and it doubles as a fan and humidifier for year-round use. The current price of $42 is $65 off the $107 list price. Buy Now at Amazon

Cooling or heating a single room, garage, or addition without ductwork is the main use case here, and the 17 SEER2 rating means decent efficiency for the size. At $387.62, that's $42 (about 10%) off the $429.99 list price. Buy Now at Amazon