Call or Text: 503-353-0100
Frequently Asked Questions
How do I size my heating and cooling systems?

Sizing your system is very important. In today’s economy of high fuel costs, it is especially important to make sure you are getting the most efficient system for your square footage – not over, not under. We can help you pick the right size heating or cooling system for your situation. Our knowledgeable staff will assist you in comparing gas furnaces and air conditioning systems. They know the furnace ratings and everything you need to know to make well-informed decisions.

Where can I get questions answered about natural gas heating and cooling?
Give us a call and we’ll provide the answers. We have a staff of experts ready to assist you with your natural gas heating and cooling needs. We’ll help you select the most efficient system. We can also assist with providing service and parts.
Where can I find Honeywell thermostats or controls?
In our warehouse, we stock Honeywell thermostats, controls and everything you need. Give us a call and we'll assist you!
What does HSPF stand for?
There are special names for the efficiency ratings of varying types of equipment. Heat pump equipment in the heating mode is rated by the Heating Seasonal Performance Factor, or HSPF. The higher the HSPF rating, the more efficient the unit.
What do rating numbers mean?
The U.S. government requires an efficiency rating of all air conditioning and heating equipment. The rating reflects the percentage of energy used efficiently, with a high rating indicating high-efficiency.
What is a SEER?
There are special names for the efficiency rating of various types of equipment. Air conditioning equipment is rated by the Seasonal Energy Efficiency Rating, or SEER. The higher the SEER rating, the more efficient the unit.
Who do I contact for air conditioning products and service?
For questions concerning new products, energy efficiency ratings, savings on your utility bills, or repair or replacement services, call your local RUUD dealer. He can answer all of your heating and cooling questions.
Should outdoor units be covered in winter?
No. RUUD heat pumps operate year-round and should never be covered. Similarly, air conditioners that operate seasonally are built to withstand an outdoor environment and should not be covered.
Should a thermostat be set to "auto" or "on"?
Preferably auto. That way, the fan operates only when the temperature requires it. This is the most used and the most efficient setting. However, there are advantages to using the "on" setting. Air is constantly filtered through the unit's air filter, and the constantly circulating air results in an even temperature throughout the house.
Can shrubs or flowers be planted around an outdoor unit?
Yes. However, we recommend that plants be no closer than 18 inches to the unit. This allows for plenty of room for air circulation in and out of the unit. Without this room for air circulation, the unit could overheat, resulting in a premature need for service.
If an outdoor unit needs replacing, should the indoor unit be replaced too?
Yes. RUUD air conditioning and heating units are designed to operate as a complete, matched system. The efficiency rating is based on the entire system. Replacing the entire system ensures the system will be reliable and efficient.
How do I know what size unit our house needs?
Ask your RUUD dealer. He will consider many factors before making a recommendation. Factors like … size of the house, climate, the number and type of windows installed, insulation, and even the number of people living in the house.
What is the difference between a split system and a package unit?
A split system uses indoor and outdoor components to provide a complete home comfort system. A package unit or self-contained unit requires no external coils, air handlers, or heating units.



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Mar-Hy Distributors 
Air Conditioning and Heating
3850 SE International Way, 
Milwaukie, Oregon 97222

Telephone: 503.353.0100
Text: 503.353.0100
Parts Orders Fax: 503.652.1330
Equipment Orders Fax: 503.652.4041
Main Office Fax: 503.353.0900