Ductless Mini-Split Systems in Longmont, CO
Heating and cooling exactly where you need it, with no ductwork and no major construction. Ideal for the rooms your central system never quite reaches.
Comfort for the Spaces Your Ducts Cannot Reach
Every Longmont neighborhood has them: the older bungalow that was built without ductwork, the sunroom addition that bakes in July, the detached garage that doubles as a shop, the finished basement that never gets warm. Running new ducts to those spaces is expensive and messy, and sometimes it is not possible at all.
A ductless mini-split solves the problem without tearing into walls. A compact outdoor unit connects to one or more slim indoor air handlers through a small refrigerant line, and each indoor unit heats and cools its own zone with its own remote or app control. Installation is usually completed in a day, and the only opening in the wall is a few inches wide.
Because mini-splits are heat pumps, they do both jobs. In summer they cool and dehumidify like a central air conditioner. In winter they reverse to heat, and today’s cold-climate models keep working through Front Range temperatures that would have stalled older designs. Variable-speed compressors run longer at lower speeds, which means steadier temperatures, quieter operation and strong energy efficiency.
M&M Heating, Cooling, Plumbing & Electrical has installed, repaired and maintained ductless systems across Longmont and the Front Range since 1996. Our NATE-certified technicians size each zone properly, place indoor units where they work best, and back every new installation with financing options and our One Year Test Drive. Not sure whether a mini-split or a whole-home heat pump is the better fit? We will walk you through both.
Common Reasons Longmont Homeowners Go Ductless
If one of these sounds like your house, a mini-split is probably worth a conversation.
Older Homes Without Ductwork
Many of Longmont's older homes were built with boilers or wall furnaces and never had ducts. A multi-zone mini-split adds real air conditioning and efficient heating without gutting the house.
Additions and Sunrooms
Extending existing ductwork to an addition often overloads the original system. A dedicated ductless zone gives the new space its own comfort control without touching the rest of the house.
Garages, Shops and Studios
Workshops, home gyms and detached offices need heating and cooling that is independent of the house. A single-zone mini-split keeps the space usable through both January and July.
Basements and Bonus Rooms
Finished basements run cold, and bonus rooms over the garage run hot. A mini-split in the problem room fixes it directly instead of fighting the thermostat for the whole house.
Zoned Comfort for the Whole Home
A multi-split system with several indoor units lets each bedroom or living area set its own temperature, so nobody argues over the thermostat and empty rooms are not conditioned for no reason.
Mini-Split Repair and Service
Already have a ductless system that is leaking, icing up or showing an error code? We repair and maintain all major brands of mini-splits, with 24/7 service and no overtime charge.
The M&M Difference
Ductless done right, from zone sizing to the last bead of sealant.
Sized and Placed Correctly
A mini-split that is too big for a room short cycles, and one placed poorly leaves cold corners. We size each zone and position every indoor unit with intention.
NATE-Certified Installation
Refrigerant lines, condensate routing, electrical and mounting all need to be done right for a ductless system to last. Our licensed and insured techs do it to spec.
One Year Test Drive
Every new ductless installation is covered: if you are not 100% happy within the first year, we make it right, up to removal and a full refund. Conditions may apply.
Family-Owned Since 1996
We live and work in Longmont, and we will still be here when your system needs a tune-up or a repair years from now.
Our 4-Step Process
Most single-zone systems are installed in a single day.
Home Visit and Zone Planning
We look at the rooms you want to condition, measure them, check sun exposure and insulation, and map out where indoor and outdoor units will go.
Equipment Options and Pricing
You get upfront pricing on single-zone or multi-zone systems that fit the plan, including efficiency differences and financing options.
Clean, Careful Installation
Our team mounts the indoor units, sets the outdoor unit, runs the line set through a small sealed opening, connects power and commissions the system.
Demonstration and Support
We show you how to use the remote or app, explain filter cleaning, and schedule maintenance so the system keeps performing year after year.
Ductless Mini-Split Questions from Longmont Homeowners
Do ductless mini-splits work in Colorado winters?
Yes, with the right equipment. Cold-climate mini-splits are built to keep heating efficiently well below freezing, which covers the bulk of a Front Range winter. During the deepest cold snaps, output drops and many homeowners keep a backup heat source or pair the mini-split with an existing furnace or boiler. We will match the model to how you plan to use it.
How many indoor units do I need?
One indoor unit conditions one zone, usually a single room or an open living area. A single-zone system covers a garage, addition or bonus room. A multi-zone system connects several indoor units to one outdoor unit for whole-home comfort. We size each zone individually so no room ends up with too much or too little capacity.
Is a mini-split cheaper to run than central AC?
Often, for two reasons. Ductless systems avoid the energy lost through leaky or uninsulated ductwork, and variable-speed compressors run at the speed the room actually needs instead of blasting on and off. You also only condition the zones you are using. Actual savings depend on your home and habits, so we talk in realistic terms rather than promises.
Will the indoor unit be loud or ugly?
Modern indoor units are slim, run very quietly on low speeds and mount high on a wall where they stay out of the way. Ceiling cassette and low-wall options are available for rooms where a wall unit does not fit the look. The outdoor unit is compact and can usually be placed on a pad or wall bracket out of sight.
Can you install a mini-split in a home with no existing cooling?
Absolutely. That is one of the most common jobs we do in Longmont's older neighborhoods, where homes have radiators or wall heaters and no ductwork. A multi-zone system brings real air conditioning and efficient heating to the whole house with only a small penetration through each exterior wall.
What maintenance does a ductless system need?
Less than you might think, but not none. Homeowners should rinse the indoor unit's washable filters every month or two during heavy use. Once a year, a technician should clean the indoor coil and blower wheel, check refrigerant charge and clear the condensate drain. Ask about adding your mini-split to a Loyalty Club membership.
Add Comfort Anywhere. Ask About Ductless.
Open 24/7 | Emergency Service Available
Call (720) 608-3973Ductless Mini-Splits Across the Front Range
Proudly serving Longmont, CO and surrounding communities including Erie, Frederick, Firestone, Dacono, Mead, Johnstown, Berthoud, Niwot, Gunbarrel, Lafayette, Louisville and Superior.
Primary Service Area
- Longmont, CO
- Erie, CO
- Frederick, CO
- Firestone, CO
- Dacono, CO
Extended Area
- Mead, CO
- Johnstown, CO
- Berthoud, CO
- Niwot, CO
- Gunbarrel, CO
Also Serving
- Lafayette, CO
- Louisville, CO
- Superior, CO
