Brennan Heating & Cooling Inc. in Great Falls, MT

04/07/2026

If you live in the area around Lincoln School and you have the insulation in your yard. Check your furnace intake for the insulation. We replaced a furnace today and guess what it was full of.

06/13/2025

Cottonwood flying around like crazy. Please gently wash it out of your outside condenser so your air conditioner works properly

04/24/2025

Video walk thru of the ductwork.

04/24/2025

Work in progress. The air you breathe and the conditioning either heating or cooling isn't the thing you usually see in a home but it is so important to your health and comfort. Make sure the company you use for your projects understands this and does the job the right way.

02/20/2025

We have had some "Snow Birds" leave for some time this winter. They have set their thermostat too low causing some furnaces to freeze up.

With the freezing weather WE recommend 65 degrees set on your thermostat.

From the Manufacturer - No lower than 60 on set-back for Return Air.

The Why - The secondary heat exchanger is designed to handle acidic condensate. The primary is not intended to handle condensate and lower RA temps may cause condensate to form there, causing premature failure in the primary heat exchanger.

02/19/2025

New Plasma table training. Using improved technology for our Duct Work.

01/13/2025

08/27/2024

$5,500 EACH. (2) New Trane 3 Phase Roof Top Units with Hail Guards and 1 with Economizer.
NOTE: Units Have to be Horizontal Discharge.

03/18/2024

Sometimes the end result looks simple but there is a lot of work that goes into it.

01/13/2024

This is a vent that runs through the roof. Solid ice through the pipe. This weather got furnaces, water heaters, plumbing pipes. The Heating and Plumbing shops have been swamped.

01/12/2024

For the next few days we all will experience temperatures and wind chills that our homes' heating systems are NOT designed for. Below zero temperatures over a long period of time with wind chills into -20+.
Newer homes will struggle to maintain temperature and older homes will NOT maintain temperature and the temperature WILL drop while the heating system is working at full capacity.

1. Please raise the temperature in your home, 2 to 4 degrees above your normal setting.
2. Take all programmable thermostats out of setback mode and set on a permanent HOLD.
3. If you have a furnace; replace the filter.
4. Keep garage doors closed.
5. Limit opening exterior doors.
6. Make sure air vents and radiators are not blocked or obstructed.
7. If you have a 90%+ furnace and boiler: You must keep the intake and exhaust clear of ice and snow. During these cold temperatures, ice can build up. A 90%+ furnace and boiler have 2 white PVC pipes; an exhaust pipe and an intake pipe that are generally on the side or back of your home. In some instances, they are on your roof, do NOT go on your roof to clear the pipe.
If the temperature in your home is dropping and your radiators are HOT with boiler systems or you have HOT air coming out of your vents with furnaces DO NOT PANIC. Please make sure that your heating system continues to operate.

If the temperatures drop in your home, it will not be able to recover until temperatures rise and the wind-chill diminishes. Our heating systems cannot overcome temperatures this low with wind chill up to -20+. They are sized to operate at 0 degrees outdoor. Put your thermostat on hold 70 degrees or higher.
To help minimize temperature loss you can boil water, make soup, or stews; they help introduce humidity and warmer temperatures into your home.

DO NOT USE YOUR OVEN or a GRILL TO HEAT YOUR HOME.

Please check on neighbors and elderly residents during these extreme temperatures. Stay warm and safe this week and share this post with any of your family and friends.
Key is do NOT panic with falling temps inside your home if you have heat coming out of your registers. It is doing all it can.

Stay safe and bring your pets inside.

If you do not have carbon monoxide detectors in every bedroom. Purchase and install digital readout ones as soon as possible.

01/11/2024

If you wonder why I nag about filter changes. No heat minus 12 degrees.