HVAC Installation in Stevensville, & Bitterroot Valley, Montana

Code-compliant HVAC Installations by Certified HVAC Specialists


Need an expert pair of hands for HVAC installation? Look no further. Poorly installed systems require frequent repairs. HVAC repairs are both time-consuming and costly. Save yourself the trouble down the line by hiring the most dependable HVAC installation experts in town. We install, replace, and upgrade HVAC systems of all brands, makes, and models.

We carefully read and follow the instructions provided by the manufacturer to ensure a safe and code-compliant installation. More often than not, we face challenges due to complex building layouts, lack of ductwork connections, and unexpected site conditions like uneven floors or tight spaces. 


To counter these potential curveballs, we employ flexible project management strategies. First, we perform load calculations based on building design, orientation, insulation, and other factors to determine the optimal system size and capacity. We consider factors like heat characteristics, insulation, and the U-value of windows and doors to optimize system performance. Apart from installation, we also perform routine tasks like changing air filters, cleaning evaporator coils, and checking refrigerant levels.


Call us today for more information. 

GET A QUOTE

HOURS OF OPERATION

Mon - Sun
-

Our Process Overview

Our commercial HVAC installation process is a multi-step procedure. Here’s how we ensure your new system delivers peak performance right from the start. 

Step 1

We begin by precisely sizing the equipment - performing comprehensive load calculations factoring in your building's design, orientation, and insulation levels. The industry-standard Manual J method guides these calculations for accurate sizing and maximum energy efficiency.

Step 2

Our team develops a detailed installation plan to minimize disruptions to your operations while obtaining all required permits for code compliance. We'll prepare the site by creating access points and protecting surrounding areas. 

Step 3

For ductwork, we follow industry best practices and guidelines for ductwork design and installation. We will insulate ducts in unconditioned spaces to prevent heat loss or gain. If we find any leaks, we will seal them with mastic or duct sealing tape to maintain airflow and energy efficiency.

Step 4

We religiously follow the manufacturer's manual for proper equipment placement and connection. Once the system is in place, we set up thermostat controls and automated system components for effortless operation.

Step 5

 The next step is performance testing. We use advanced tools to measure temperatures, pressures, and amp draws at multiple points.

Step 6

Finally, we offer a walkthrough where our technicians explain basic operation and thermostat controls. We will be happy to answer any questions you may have about maintenance and upkeep.

Seamless Installation by Qualified Experts

Improper HVAC installation  can void your warranty. HVAC systems are a massive financial investment, which is why when it comes to the installation, you should only trust the best. For over three decades, M&L Heating & Cooling, Inc. has been the name homes and businesses trust for reliable  HVAC installations


We strive to stay ahead of the curve, continuously investing in training and certifications to ensure our team is familiar with the latest energy-saving technologies and system designs. 


Contact us today for a free consultation.

FREQUENTLY ASKED QUESTIONS

  • How do I know if I need a new HVAC system instead of a repair?

    If your HVAC system is over 10–15 years old, requires frequent repairs, causes inconsistent temperatures, or has significantly higher energy bills, it may be time to replace it. M&L Heating & Cooling offers professional evaluations to assess your system's efficiency and determine whether a replacement would be more cost-effective in the long run. A new installation may seem like a big investment upfront but often leads to long-term savings on repairs and energy use—especially in the variable climate of the Bitterroot Valley.

  • What size HVAC system do I need for my home?

    HVAC system sizing depends on more than just square footage. At M&L Heating & Cooling, we perform a detailed load calculation that considers insulation, window placement, ceiling height, sun exposure, and more. An improperly sized system can lead to short cycling (too big) or overworking (too small), reducing system life and increasing energy costs. Proper sizing ensures optimal efficiency, comfort, and humidity control throughout your home—especially important in Montana’s shifting seasons.

  • How long does a typical HVAC installation take?

    A standard HVAC installation takes about 1 to 2 days, depending on the complexity of your system and whether ductwork or other custom modifications are required. At M&L Heating & Cooling, we provide a clear timeline during our consultation and stick to it. Our technicians ensure all components are installed correctly, test airflow and thermostats, and walk you through system operation before leaving your home. We aim to minimize disruption while ensuring quality, compliant work from start to finish.

  • What’s the difference between a heat pump and a furnace/AC combo?

    A heat pump is an energy-efficient system that provides both heating and cooling by transferring heat rather than generating it. A furnace/AC combo uses combustion or electric resistance for heat and a separate unit for cooling. Heat pumps work best in milder climates, but with modern high-efficiency models and dual-fuel setups, they are increasingly popular in Montana. Our technicians will help you weigh long-term costs, climate compatibility, and performance to choose the best option for your home.

  • Will a new HVAC system reduce my energy bills?

    Yes—modern HVAC systems are significantly more energy-efficient than older models, especially when installed correctly. SEER (Seasonal Energy Efficiency Ratio) ratings and ENERGY STAR® certifications help identify top-performing units. M&L Heating & Cooling ensures optimal installation and recommends systems tailored to your household usage, insulation, and regional climate. Many of our customers in the Bitterroot Valley report energy savings of 20–40% after replacing outdated equipment, especially when paired with smart thermostats and proper duct sealing.

  • Do I need to replace my ductwork when installing a new HVAC system?

    Not always, but it’s important to have your ductwork inspected. Leaky, undersized, or poorly insulated ducts can reduce your system’s efficiency by up to 30%. During installation, M&L Heating & Cooling performs a thorough duct evaluation. If repairs or upgrades are needed, we’ll explain your options. In many cases, addressing ductwork during installation avoids future performance issues and enhances airflow and comfort—particularly important for homes with inconsistent room temperatures.

  • What should I do to prepare for my HVAC installation day?

    Before installation day, clear access to your HVAC system and ensure pets or children are safely away from work zones. Remove any obstacles near indoor and outdoor units and confirm parking availability for our technicians. At M&L Heating & Cooling, we handle the rest—from protecting floors to disposing of old equipment responsibly. We also coordinate with you in advance to confirm arrival times, answer last-minute questions, and provide a checklist so the process goes smoothly.

  • Are permits required for HVAC installation in Montana?

    Yes, in most cases. HVAC installations require local permits and inspections to ensure compliance with safety codes and energy standards. M&L Heating & Cooling handles all permitting for you. We are licensed and fully familiar with regional building codes in Stevensville and the Bitterroot Valley. Proper permitting ensures your system is installed safely, legally, and in accordance with energy regulations—protecting your investment and your home’s future resale value.

  • Is financing available for HVAC installation?

    Absolutely. We understand that HVAC installation is a significant expense. M&L Heating & Cooling offers financing options to help you spread the cost over manageable monthly payments. These options allow you to invest in a higher-efficiency system without compromising on quality due to upfront costs. We also guide customers through available rebates, tax credits, and energy-saving incentives offered by local utility companies and government programs to help reduce your overall cost.

  • What warranties come with a new HVAC system?

    Most systems come with a manufacturer’s warranty covering parts for 5–10 years and a labor warranty provided by the installer. At M&L Heating & Cooling, we stand behind our workmanship with a satisfaction guarantee and offer extended labor warranties for added peace of mind. We also register your equipment with the manufacturer when needed to ensure full warranty coverage. Proper installation and routine maintenance are key to preserving these warranties and avoiding voided claims.

client testimonials

Timely work performed on the installation of two mini splits in our rental property. No waste of materials. Would and will be using M&L again.

SweetL.

All new heating system installed into an older house and newer addition, cut in new vents and ran all new duct work. They cleaned up behind themselves as they worked and left no trace at the end of each day. They will be returning to add an additional unit upstairs. Highly recommend.

Noah D.

Fixed my wall heater. Showed up on time and took thier tech about 5 minutes to figure out the problem and fix it. Spent the rest of his time cleaning and servicing the unit while he was there. Would recommend.

John B.

M & L put in whole house steam humidifier on our existing gas furnace. It has been working very well.

Jack T.

.

Service response was very prompt, friendly and knowledgeable. Excellent service overall.

Eileen R.

.

As a general contractor i appreciate Mike's attention to detail and knowledge of his craft. Ive worked with M and L Heating and cooling on 12 houses now and am extremely satisfied with his work. They are the only heating and air conditioning company Ill use.

David M.

Timely work performed on the installation of two mini splits in our rental property. No waste of materials. Would and will be using M&L again.

SweetL.

Timely work performed on the installation of two mini splits in our rental property. No waste of materials. Would and will be using M&L again.

SweetL.

All new heating system installed into an older house and newer addition, cut in new vents and ran all new duct work. They cleaned up behind themselves as they worked and left no trace at the end of each day. They will be returning to add an additional unit upstairs. Highly recommend.

Noah D.

Fixed my wall heater. Showed up on time and took thier tech about 5 minutes to figure out the problem and fix it. Spent the rest of his time cleaning and servicing the unit while he was there. Would recommend.

John B.

M & L put in whole house steam humidifier on our existing gas furnace. It has been working very well.

Jack T.

.

Service response was very prompt, friendly and knowledgeable. Excellent service overall.

Eileen R.

.

As a general contractor i appreciate Mike's attention to detail and knowledge of his craft. Ive worked with M and L Heating and cooling on 12 houses now and am extremely satisfied with his work. They are the only heating and air conditioning company Ill use.

David M.

Timely work performed on the installation of two mini splits in our rental property. No waste of materials. Would and will be using M&L again.

SweetL.

All new heating system installed into an older house and newer addition, cut in new vents and ran all new duct work. They cleaned up behind themselves as they worked and left no trace at the end of each day. They will be returning to add an additional unit upstairs. Highly recommend.

Noah D.