December 28, 2016

       The simple answer of how to defrost a freezer is take everything out, unplug it and prop open the door. If your freezer slowly begins to fail it is very possible you need to defrost it. Many freezer have an auto defrost cycle built into their schedule. If your u...

December 21, 2016

     The short answer to this question is 9 months. But you seem like the kind of person who must understand why this is true. There are several factors that play a role in the safety of foodstuffs but the big consideration is bacteria. How long would it theoretically...

December 14, 2016

     A convection oven is an oven with a fan in it. This is of course a simplification but to understand everything that it means to be a convection oven one must understand a little about a lot of things. A little about thermodynamics, cook times and commercial cookin...

December 7, 2016

Businesses everyday loss thousands of dollars in product and productivity due to failed refrigeration systems. Most businesses do not have a plan to manage this type of mini emergency. Knowing who to call is half the battle the other half is best practices. The followi...

November 30, 2016

     Freezer burn is simply drying of food in the freezer. But there is of course plenty to know about the causes, prevention and science behind the process. If you are consistently experiencing freezer burn in your freezer this article will help abate the process....

November 23, 2016

If you are starting a Restaurant business in Maryland I think you are a pretty savvy person so I will keep the obvious steps short and try to expand on the lesser understood steps as much as possible.

  1. Concept: Imagine the look, feel and food of your business.

  2. C...

November 16, 2016

     The short answer in 40 degrees Fahrenheit. The long answer is much more fun though so I will start by talking about freezing semi solids then move to refrigeration mechanics then move to thermodynamics within the refrigeration space. I promise to leave the math ou...

November 9, 2016

     As a kitchen equipment repair company we often have refrigerators with a deep malodorous aroma. However, we have many remedies both specific and and general to confront these affronts to the nose. Before talking about stench we have to establish its origins. Speci...

November 2, 2016

     We have all heard of geothermal power. This typically refers to steam produced by geothermal. This steam is in turn used to power turbines. However, much of the geothermal accessible to us is warm but not boiling. In this case refrigerants or refrigerant gases can...

October 26, 2016

     Modern air conditioning was not the first form of air conditioning ever employed by humans. Before air conditioning several things were done. Ice was hauled to less temperate climates from more temperate ones. The roman aqueducts actually ran through some building...

Please reload

Featured Posts

Emergency Refrigeration Planning

December 7, 2016

1/3
Please reload

Recent Posts

December 28, 2016

November 30, 2016

Please reload

Archive
Please reload

Search By Tags
Please reload

Follow Us
  • Facebook Basic Square
  • Twitter Basic Square
  • Google+ Basic Square
Contact Us

Contact us for an estimate today!

With our headquarters in Beltsville, MD we serve Maryland, Washington DC, and Northern VA including:

RJH Service Areas

Frederick

 

Baltimore

 

Silver Spring

 

Annapolis

 

Alexandria

Arlington

Bethesda

Washington, DC

Fairfax

Dulles 

Rockville

Columbia

  • Facebook
  • LinkedIn
  • Twitter

​© 2020 RJH Air Conditioning & Refrigeration Service LLC.