Rooftop Units
No Data Tag, No Problem
Q: “I need to replace this RTU but there is no data tag (or it’s not legible). How do I know what size unit I need?” With no data tag, it’s hard to know what the existing RTU size is, but with enough information, you can usually get close. Here are 8 pieces of information to
Economizer, ERV or DOAS?
At cfm we are often asked: “How much outside air can we bring in thru a standard RTU?” The short answer is you can bring in as much as you want, but you might run into issues as the percentage increases. The biggest issue with a large concentration of outside air is the leaving air
Can you use a standard rooftop for a makeup air application?
We get asked this question often. And for good reason, DOAS equipment is expensive. If a building owner needs makeup air, in most cases a DOAS will be required. In a SMALL number of cases, however, it may be possible to use a unitary rooftop unit (or split system) for 100% makeup air. But beware, there are
Did you know: Hot Gas Reheat provides NO benefit on a design day?
Did you know: hot gas reheat operation (for dehumidification) provides NO benefit on a summer design day? This can be an easy mistake to make. (to clarify from the start, this is NOT a discussion about DOAS, but rather a standard return air rooftop unit). If you have a customer that would like to maintain a specific space temperature
Are rooftops a commodity? Maybe.
Are rooftops a commodity?Maybe.But there is a lot to think about when replacing an existing unit, or doing a design/build job.Is quick and easy access important? Maybe we should look at a unit with hinged and toolless access and a slide out blower. Is comfort critical? Maybe we should look at more cooling stages and
Airside economizers: Are they required on your project and are they a good investment?
Airside economizers are very simple in theory. Their function is to shut off the unit’s compressors and provide “free cooling” when the temperature outside is cold. Done, end of story. But trying to figure out if the local code requires one, and then trying to understand what type is required can leave you dazed and
Should You be Adding a VFD on Every Packaged Rooftop Unit?
Switching to Geico may or may not save you 15% on your car insurance, BUT, adding a variable frequency drive (VFD) to your multistage equipment will do the trick! Okay, you caught me speeding- adding a VFD won’t save you anything on your car insurance, but it WILL save you or your customer money on their
ARE YOU READY? Commercial Package Rooftop Unit Regulatory Changes Are Coming!
Welp! The U.S. Department of Energy (DOE) is at it again. But it should come as no surprise, right? Every few years we see higher and higher minimum efficiencies for all types of heating and cooling equipment. And truthfully, it’s the way it should be isn’t it? With technology doubling about every 18 months, it’s
Customer Impressed or Not? YORK’s New Simplicity Smart Controls Get Demoed
Earlier last month, a few cfm Distributors, Inc team members helped a local mechanical contractor put on a 3-day customer appreciation event, and were asked to talk about “any new technologies or products from YORK”. The topic? It was a no-brainer: YORK’s NEW Simplicity Smart controls and Fault Detection & Diagnostics. The cfm team arrived
Is the future of Fault Detection & Diagnostics really here?
Fault detection & diagnostics will make for one of the biggest advancements in the packaged rooftop unit industry in 2016. See what York’s changed here.