Metabo HPT is so well known for the quality of their nailers that youโd think compressors would be a natural part of their lineup. While there are several on the market, compressors arenโt the kind of productย that you see come out every six months or a year like many cordless tools. When I learned that the Metabo HPT EC99S 4-gallon Twin Stack Compressor was being launched, I had to get my hands on it to replace the aging pancake model Iโd been working with.
Metabo HPT EC99S Air Compressor Features
Compressors arenโt necessarily the prettiest part of your arsenal, but thereโs a lot more going on under the housing in modern units than meets the eye. This mainly takes the form of thermal overload protection and the Metabo HPT EC99S includes it. Should the motor begin running too hot, it will automatically shut down before it gets hot enough for damage to set in.
Other features are also designed to maintain durability. The 15-amp motor is a direct drive induction design. The regulators include locking mechanisms to ensure the proper pressure is delivered to your tools. Metabo HPT went with steel-encased, industrial-level pressure gauges on this model.
One nice feature Metabo HPT built in is a 105 on/135 off switch. This flips the compressor back on before you start getting too low a pressure and begin firing your nails too shallow.
Many modern small compressors are now oil-free, but the Metabo HPT EC99S isnโt in that class. The included 15W40 ย synthetic oil will get you going, however. That feeds into a cast iron pump.
Non-slip, no mar rubber feet are found on the lower frame. Thereโs a standard ball valve drain cock at the base of the tank that makes pressure release simple.
Pro Tip: Always drain your compressor at the end of each day. Moisture in the air becomes trapped in the tank and can begin to rust it from the inside โ especially if you live near the coast where salt is in the air as well.
First Impressions
Out of the box, the physical design of the Metabo HPT EC99S struck me. Compressors arenโt normally something you think of as streamlined, but this one looks good. The coloring is nice (matching the pneumatic nailers) and gives it a more subtle look than the bright green found on the cordless tools might offer.
The carry handle centered above the compressor is as near perfect as you can get for a 53-pound tool. It really makes the compressor easier to handle with one hand, though the weight is still something Iโm not in a hurry to pick up and move every ten minutes.
Thereโs just a single universal quick coupler, so youโll be working solo with this unit unless you add a splitter. My first thought was that Iโd like to have a second on it, but the reality is that when Iโm working on my remodeling projects, Iโm usually trimming or framing on my own.
Real World Performance
One of the first things most Pros consider when they turn their compressor on for the first time is the noise level. You have to know what to expect if youโre called out to a school, office building, or other structure that may be occupied while youโre working. The Metabo HPT EC99S doesnโt claim to be a low-noise model, but itโsย actually on the quieter side for this class. Just donโt expect it to be quiet enough to work inside while your client catches a Sunday afternoon nap.
From there itโs all about performance. I love the 105 PSI on switch. At no time did I fall short on air pressure as each nail slammed into pressure-treated pineย with confidence. Youโll notice that the compressor cycles a little more frequently but for a shorter duration to make it happen.
The recharge rate is solid with this model. From dead empty to 135 PSI, it took just over 1 minute, 20 seconds (1:22 by my watch). Once I drained it to 105 PSI, it filled back up right at 20 seconds.
Additional Notes
I read several reviews where users had an issue with the Metabo HPT EC99S Compressor popping the fuse every time it turned on. All of my work has been off of 20-amp breakers and I havenโt run into this problem so far.
The vibration in this unit seems to be lower than other compressors Iโve used. The direct drive motor and rubber feet certainly help reduce it. The build quality comes across as very solid, so what little vibration is there transfers to the feet where the rubber absorbs it.
Conclusions
The team really did a nice job designing the Metabo HPT EC99S Twin Stack Compressor. Features like the carry handle and 105 on/135 off switch really help with productivity and it has the look and feel of a compressor designed to last. I think weโd all love our compressors to be anย oil-free design. However, Iโll put up with the routine maintenance in order to get the kind of quality that Metabo HPT seems to have built into this unit. At $229 you really canโt go wrong running your crew off this tool.
Metabo HPT EC99S Twin Stack Compressor Specifications
- Model: Metabo HPT EC99S
- Power Source: 120V AC
- Motor: 15-amp, 2.0 horsepower direct drive
- Max Pressure: 135 PSI
- Max CFM: 3.1 @ 90 PSI
- Tank Style: Twin stack
- Tank Capacity: 4.0 gallons
- Coupling Sockets: 1
- Lubrication: 15W40 oil
- Weight: 52.9 pounds
- Price: $229
- Warranty: 1 year
