Old AC on its last summer? Diamond designs, sizes, and installs high-efficiency cooling systems the right way - with a free in-home estimate, 2-Year Satisfaction Guarantee, 10-year labor warranty, and financing to spread the cost.
Limited-time summer offers from Diamond - just mention the offer when you call.
Upgrade to a high-efficiency air conditioner, professionally sized and installed - and keep $600 in your pocket this summer.
Call to claimAn $895 value - a full decade of labor coverage included when Diamond installs your new system.
Call to claimA smart thermostat included with a new furnace or AC - comfort and savings, dialed in.
Call to claimOffers valid June–August 2026. Cannot be combined with other offers. Some restrictions apply; ask for full details when you call. Financing subject to credit approval.
Tap what's going on - we'll walk you through it on a free in-home estimate.
Not sure if it's time? Call 208-231-1635 - we'll talk through repair-vs-replace honestly.
We come to you, measure your home, review your existing setup, and design the right system for your space. No pressure, no obligation.
Clear line items, manufacturer warranty details, 10-year Double Diamond Labor Warranty, financing options. Multiple tier options if you want them.
Typically completed in one day. Licensed HVAC technicians, proper refrigerant handling, cleaner-than-we-found-it site standards.
Full performance test under load, thermostat setup, homeowner walkthrough (filters, maintenance, warranty registration), paperwork in hand.
A new AC is expensive. The wrong one, installed wrong, is ruinously expensive. Here's what separates Diamond from cheaper operators who cut corners you can't see.
Sized and designed for your space. No more 'the upstairs never cools' or 'the bedroom is always 6° warmer than the living room'.
High-efficiency systems, properly sized, correctly installed. The savings vs. an old or oversized system are real - and they compound every summer.
Ten years. We're that confident in the install. Parts covered by the manufacturer, labor covered by us. Peace of mind built in.
We quote multiple tier options on every estimate so you can pick the right balance of cost, efficiency, and performance. Here's the general shape.
Central AC installation pricing depends on your home and your existing setup. Here's what drives the quote - and why we never price-guess on the phone.
A 1,500 sqft ranch needs a very different system than a 3,500 sqft two-storey. Getting the size right saves thousands over the life of the system.
A standard-efficiency system and a high-efficiency variable-speed system are priced very differently. We quote tiers so you can choose.
Ductwork condition, electrical service, condenser pad, refrigerant line set - the state of what's already there affects the install scope.
Idaho code changes over the years. Older installs sometimes need electrical or venting upgrades to be compliant. We handle the permits.
Spread the cost over monthly payments. We'll walk you through options on the free estimate.
Diamond was built by Rick and Sue Ellen in 1999 to do home services the way homeowners actually deserve - properly trained technicians, your-quote-is-your-price honesty, and one accountable team for every trade.
Idaho's Best HVAC Company seven years running (2020–2026), Idaho's Best Contractor 2022, and the BBB Torch Award for Ethics in 2014 and 2022.
Proper heat load calculation, multiple tier options, written quote. Free estimate, no pressure, no obligation. Financing available.
"We were impressed with their up-front and clear pricing. John was on time, and explained everything necessary to do with no pressure to do it."
"Diamond Heating and Cooling was very knowledgeable and professional from start to finish. Highly recommended."
"Without a doubt, Diamond Heating and Cooling is the best possible choice you can make when deciding on a company you can rely on to provide excellent service."
Diamond is based in Garden City and serves homeowners across the Treasure Valley & surrounding areas.
Not sure if you're in our area? Call 208-231-1635 - we'll confirm on the line.
Tap the phone to talk live now. Real licensed technicians, your-quote-is-your-price honesty, no answering service.
Free in-home estimate. 10-year labor warranty. Financing available. Idaho's Best HVAC Company seven years running.
