Keystone Archives - The HVAC Blog

The 10 Best Portable Air Conditioner and Heater Combos (Updated 2025)

April 30, 2025April 16, 2021 by Staff Writer

The Best Portable Air Conditioner and Heater Combos

In houses not built with permanent air conditioning units, it is pretty disruptive to install the electrical supplies and water drains that are required. A great alternative is a portable air conditioning unit that you can quickly move between rooms, and many of these units also have a heating function. Our choice is the Black … Read more

The 10 Best Window Air Conditioners with Heat 2025

May 5, 2025February 25, 2021 by Staff Writer

The Best Window Air Conditioners with Heat

If you live in a rental property without air conditioning units or don’t want a permanent system fixed to the wall, then window air conditioning units make a great choice. Many units can be switched to a heating mode in the winter, making them very practical. This got me thinking about what features make the … Read more

The 5 Best 8000 BTU Air Conditioners

November 27, 2022January 10, 2021 by Staff Writer

Having a medium-sized compact air conditioner could come in handy when in need to cool off a mid-sized room or office space and even a garage or a tool shed. The window-mounted and portable 8000 BTU air conditioner units are perfect for spaces of up to about 340 square feet, where they perform best. The … Read more

The 5 Best 5000 BTU Air Conditioners (Updated 2025)

April 30, 2025January 10, 2021 by Staff Writer

It is essential to make the right choice when picking up a new air conditioner for whatever space you might want to take care of. Whether it is an office space, your home, garage, or a workshop, energy efficacy, and proper size are crucial for picking the correct unit. In our opinion, after many hours … Read more