Category: HVAC

Homemade Air Heater – Will This Work?

Help!!! [Don’t want to burn the house down.]

Q: Hi all very simply it’s copper tubes, small pc fans, and surrounding the copper tubes is several 15 to 20w quartz halogen (I think?) heater spotlight lamp bulbs. If this is placed in a wall to heat a small bathroom bringing cold air outside in, will it be able to do so? Thanks a bunch – any recommendations for efficiency or a similar design welcome. – A1d4n_18

A: Sounds pretty good to burn your house down. How is this cheaper than something UL approved?

You’ll also not be anywhere near the same efficiency as something off the shelf. Don’t do it.

– DietCokeFiend

This. Pick up a wall can at the local big box home improvement warehouse for $100-200. It’ll not be a fire hazard AND it recycles warm air from the room, not cold outside air.

– Deltigre

10 Oct

5 Mini-split Accessories Mandated by Building Codes

Many HVAC contractors are unaware of five accessories that are mandated by building codes, and that have been written for the fast-emerging ductless mini-split market.


Most qualified contractors are knowledgeable of building codes for general HVAC work. However, many are unaware of five accessories that are mandated by building codes aimed at the fast-emerging ductless mini-split market.

Rather than learn what’s not code compliant from an inspector that red tags a new mini-split installation, the following list of code-mandated products are listed below:

1.Tamper-resistant locking cap for refrigerant ports

2. Condensate overflow switch

3. UV resistant wrap for linesets

4. Condensate drain hose trap

5. An indoor disconnect switch.

These accessories are mandated for a variety of reasons, but they mostly fall under life-safety, efficiency, property protection or a combination of those categories.

05 Oct

Repair or Replace?

Service Recommendations for Post Irma and Harvey Flooded A/C Units
by James Bowman, National Technical Manager–HVACR, RectorSeal, LLC.

The wake of Hurricane Irma and Harvey left thousands of residential air conditioning systems flooded throughout regions of Florida, Georgia and southern Texas and Louisiana.

Now, hundreds of HVAC service companies are facing decisions of restoring or replacing those air conditioning units. Not all properties have flood insurance. Therefore, many property owners are faced with prioritizing repairs on a very limited budget or even through charity and government assistance.

Flooded A/C units don’t always mean replacement, because there are various degrees of damage. If a service tech has a chance to save a mildly-damaged unit or simply replace a component, it might be a tremendous benefit for a flood-ravaged homeowner already facing tens of thousands of dollars in other residential construction material replacement costs. A quick fix with the strategy of later replacing the unit could also be beneficial to homeowners attempting expedite the drying out a flooded home’s interiors.

Therefore, the following is a service tech guide with tips for determining whether or not to salvage a flooded unit. Obviously, the floodwaters must have receded, power must be restored to the home, and all electric to the unit shut off.


28 Sep

PRO-Fit™ Precision Flaring Kit VS. Traditional Flaring

The next generation pipe flaring tool for copper and aluminum tubing used in air conditioning and refrigeration work.

PRO-Fit™ Precision Flaring Kit produces tubing flares in just seconds without splits, blemishes and burrs that cause leaks.

The kit consists of five bell-shaped, color-coded, size-inscribed flaring bits designed for 1/4, 3/8, 1/2, 5/8 and 3/4-inch (6, 7.5, 12, 16, 19-mm) tubing. The flaring process requires just seconds to complete using a (minimum) 12v drill or impact driver. The spinning bit forms the tube opening into a flare, without splits, burrs, blemishes or uneven edges that typically cause flare fitting connection leaks. The bits are also the most efficient option for flaring short stubs or existing tubing in cramped spaces. Replacements bits will be available.

27 Sep

BTUs explained? (Simply)

I’m 18 years old and going into my fourth week of college for HVAC. So far we have talked about states, matter, the components of refrigeration, OHSA etc. I am understanding all of that slowly, I still have some trouble with it but I’m slowly absorbing it.

However, when my professors talk about BTUs, I am at a loss. I understand that it is a way to calculate heat and that it stands for British Thermal Units but that’s all I can understand. When I try to read my textbook about it, I get confused because it goes so in depth.

Can someone please help me? – NostalgicDuck

The simplest explanation is the definition. It’s the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. – Zackhood

So if I had a pound of water sitting at 70° F, if the temperature was raised to 75° F that would be 5 BTUs? – NostalgicDuck

I think he got it. By jove he got it! – toomuchpork

25 Sep