Shamrock HVAC LLC

Delivering Amazing HVAC Quality &
Indoor Comfort

Same Day Service, Upfront Pricing &
Service Guarantee


Our Total Comfort A/C Promise

Merrill Moon Brings His Quality To You Directly

All heating and air conditioning systems are not created equal. The wrong setup could affect your health, your comfort and your wallet.

At Shamrock HVAC, we help you make ideal HVAC decisions for year-round comfort. Our team promises to solve all your A/C challenges the first time, every time. We also offer same day inspections for repairs or new roofing installations.
Merrill Moon formally with Denver's Best now brings you his fully local expertise.

Contact us today at (720) 500-7335 today to schedule an appointment!

Air - Conditioning

We install state-of-the-art high efficiency residential air conditioning units.

Heating Problem

Having trouble with your heater? We can discover possible leaks in your home.


With routine maintenance you can expect lower heating and cooling costs.


We are certified to work on a variety of HVAC systems in commercial properties.

We Provide Services 24/7!


A set of service only for you. Save time and money with installation service.


If you need quick repair, we offer it for homeowners and all customers.


Quick and regular servicing guarantees means a long use.


With routine professional maintenance you can expect lower heating and cooling costs.


We are certified to work on a variety of HVAC systems in commercial properties.


We recommend scheduling preventive maintenance calls to clean your system.

Contact Us Today for a Complete Home Air Quality Assessment

(720) 500-7335

Check Out Our Customers Reviews

See why others love our 5-star service!

Trent N..

Quality work for a fair price. Merrill is the best. Can't recommend more highly.

Michael S.

Merrill, the install tech was very knowledgeable. He identified and resolved issues with the duct work to improve air flow throughout the house.

Receive $25 OFF
Any New Service Call

Book an Appointment

Same Day HVAC
​Repair Services

If your heat or A/C is not performing at optimal levels, then you’re not comfortable indoors and your electric bill is likely going through the roof. We can quickly and affordably fix all your HVAC problems the right way, often on the same day you reach out. We offer a full service guarantee and the most experienced techs in the industry.

Which A/C & Heating Systems Are The Best For Your Home?
If you’re in the market for a new A/C unit, our team will gladly calculate the ideal size for your home. Our main priorities are always quality, price and long term energy savings. Our team works directly with all the major manufacturers to fit any layout or budget! Call Us Today 720-500-7335

Maintaining Ideal Indoor Air Quality

Shamrock HVAC has helped hundreds of happy Littleton and surrounding area residents maintain perfect air quality within their homes and businesses. Regular service protects A/C equipment from extreme weather. We ensure it run more efficiently year-round. We value your trust and will do everything in our power to ensure awesome indoor air quality.

For A Limited Time With Every NEW Install We're Giving You

A $1500 Value Air Purification SYSTEM

Reduce the following pollutants from your home or commercial building
REME HALO® Whole Home In-Duct Air Purifier
Better life through better air
REME HALO® is more than a conventional UV lamp, not only because of its innovative design, but also because of its ability to actively improve the quality of the air in your home. Most air purification systems are either passive or ineffective at meaningfully reducing pollutants. That’s why the REME HALO® was designed to be something better. Not only does it use UV light, but it also has other advanced proprietary technologies to improve the quality of your air. One of which, sets this product apart through its ability to produce low levels of hydrogen peroxide in the air that circulates through your air-conditioning system and indoor spaces. Throughout your air-conditioned space, REME HALO® reduces bacteria, viruses, odors and mold spores in the air and on surfaces. If you want to feel the healthy difference a REME HALO® can make.

Case Study - Measuring A/C Energy Efficiency

Heating & A/C in a typical home uses 50% of your annual power consumption. It may come as a surprise that air conditioning units naturally lose 10-15% energy efficiency every single year. Without proper maintenance, A/C units will continue to lose efficiency over time.

A $79 annual tune up can save you hundreds off annual energy bills and protect your equipment!

Don’t Let Outside Temperatures Ruin The Day!

Shamrock HVAC has skilled technicians on call that can solve all your HVAC problems right away!

Contact Us Now

The Myth About Freon Replacement

Some say that A/C systems require more freon every few years, but that’s simply not true. Missing refrigerant signals a leak in your system that should always be professionally located & repaired before recharging occurs. 


Who We Are

The Littleton Areas Most Trusted A/C Professionals

Shamrock HVAC was founded by Merrill Moon (formally with Denver's Best Heating & AC Repair) to make a real difference in our client’s homes and businesses. We pride ourselves on being honest and dependable while providing complete air conditioning solutions. From heating and cooling to duct work, air quality, maintenance and energy efficiency, we will go above and beyond for you.

With 25 years of excellent customer service, we are fully committed to solving all your HVAC needs. Contact us today at (720) 500-7335 to see how we can help!

Need To Find A Quality HVAC Professional In The
Littleton Area.

We got you covered. Our experience and quality is just what you need

Schedule an Appointment

We take great pride in delivering 100% client satisfaction every time!

Contact Us Today For FREE QUOTE (720) 500-7335


Frequently Asked Questions

How do I know if my Air Conditioning unit is big enough?
Call us and we will provide a heat load calculation to determine the proper size for you.
How often should I change the filter?
If you want your air conditioner lives longer maintain it properly and often.
What is an HVAC system tune-up?
An HVAC tune-up is essential to keep your HVAC system running efficiently throughout the year.


11676 Shafer Parkway
Unit 415
Littleton Co 80127




Monday           7 AM-8 PM

Tuesday           7 AM-8 PM

Wednesday     7 AM-8 PM

Thursday         7 AM-8 PM

Friday               7 AM-8 PM

Saturday          8 AM–8 PM

Sunday             8 AM–8 PM

Here are the cities for Emergency Repair Service:
Aurora, Arvada, Brighton, Broomfield, Castle Rock, Castle Pines, Centennial, Cherry Hills, Commerce City, Englewood, Golden, Glendale, Greenwood Village, Highlands Ranch, Littleton, Lakewood, Lone Tree, Northglenn, Parker, Thornton, Westminster, Wheat Ridge
Our Services
Heating Repair and Installation
AC repair and Installation
Commercial HVAC Services