Monthly Archives: April 2012

MIX / MATCHED CONDENSERS WITH 3rd PARTY COILS

In today’s market, a lot of contractors will use one manufacturer’s condensing unit and another manufacturer’s evaporator coil.  You should check to see if these are a match on the AHRI web site so it does not create a problem later on. A lot of … Continue reading

Posted in HVAC Tech Support | 11 Comments

THANK YOU FOR YOUR SUPPORT!

April 26th marks the 1st Anniversary of my BLOG.  When I first started it, I didn’t know how it would be received or if there was even a need for it,  Now, after 62 postings, I have to say THANK … Continue reading

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Can an 80% Furnace be Side Wall Vented?

The answer is  YES and NO! An 80% efficient furnace CAN be side wall vented per National Fuel as Code 7.3.4 with the use of a “mechanical draft system of either forced or induced draft design”. So what does this … Continue reading

Posted in Commentary, HVAC Tech Support | 4 Comments

WHY USE HOT GAS BYPASS?

The main purpose for adding Hot Gas Bypass (HGBP) to any system is to prevent condensate from freezing on the surface of the evaporator coil when the system is operating at extremely low load conditions.  The HGBP valve is controlled by … Continue reading

Posted in HVAC Tech Support | 23 Comments

Cycling off A/C or Heat Pumps by Utility Companies

People are looking for ways to save money on their utility costs, especially, air conditioning.  To control the power usage in peak times, some Utility Companies regulate consumer usage by cycling off a consumer’s A/C outdoor unit at selected times during … Continue reading

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Can High Efficiency A/C’s be put on Existing Furnaces?

The answer to the above question is YES & NO! Part of what makes a high-efficiency A/C is the indoor blower.  Yes we are talking about the need for proper air flow again, but in a different sense. In order to … Continue reading

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Repair or Replace – Savings Calculator

With the economy still in recovery, the tendency for end users is to repair an older unit instead of replacing it.  Even contractors have gotten into this mind-set because they don’t have the tools to show that this can be false economics, … Continue reading

Posted in Commentary, HVAC Tech Support | 2 Comments