Blog

Practical notes on heating, cooling and indoor air quality from the field.

Seven safe checks any homeowner can do before heating season, and the furnace work that belongs to a technician.

Fall service finds furnace problems on a mild afternoon instead of a cold night. Here is why it matters and what to watch for.

A failing or mismatched thermostat can make a good furnace or heat pump look broken. Here is how to tell when to replace it.

Indoor air can carry more dust, moisture and pollutants than you'd expect. Here is what affects it and what your HVAC system can do.

Repair is only part of the job. Here is the full range of work a heating and cooling contractor should handle for you.

Missed the spring tune-up? A late-season AC check still catches worn parts before they fail, especially if you have a heat pump.

A ground-source heat pump trades outdoor air for the steady temperature of the earth. Here is how it works and who it fits.

What to expect when you call JM Mechanical: a clear diagnosis, straight advice on repair versus replacement, and equipment sized to your home.

For landlords, planned HVAC upkeep means fewer emergency calls, more comfortable tenants and better records. Here is how to set it up.

When the HVAC goes down, the business can go with it. Here is what downtime costs and how a maintenance schedule heads it off.

What a commercial maintenance visit covers in spring and fall, and how to set up a program that fits your building.

Need service?

Call and talk to someone who can tell you what the system is doing, or send a request and we will call you back to set a time.