Delta-P & Delta-T Pumps. Big Difference.
System Design with Differential Temperature (Delta-T)
North American residential system
design is pegged to the temperature
differential between the supply and return
(Delta-T). It's part of the Universal Hydronics
Formula, it's how we sizeboilers, select pipe
size and determine the amount of radiation to
put into a room. We also zone our systems and
turn them on and off via a thermostat on the
wall- all in an effort to deliver comfort.
Universal Hydronics Formula:
GPM = BTUH ( T x 500)
Smart Delta-T Circulators
If we use a Delta-T based smart circulator in these North American systems, like the Taco Bumble Bee or 00-VDT, it reacts to how many zones are open, which zones are open, and even how cold it is outside,automatically - without an outdoor sensor. These infinitely variable speed Delta-T circulators deliver ONLY the BTU's required to match the actual heating load required by each zone. The entire system runs at peak efficiency, no matter the time of year, accurately providing optimum comfort and real electric and fuel dollar savings.
On the other hand, Delta-P ECM circulators operate best on constant circulation and utilize thermostatic radiator valves (TRV's), instead of thermostats, to control the flow to panel radiators. As the TRV's modulate open and closed, the pressure in the system changes and the Delta-P circulator speeds up and slows down to compensate for the change in pressure. In North American systems with on-off zone valves, those pumps read the number of zones in the system, assign a fixed speed for each open zone and switch motor speeds depending on which zones are open. It's like having a "however many zones are open speed pump." It's important to know that if you prefer to zone with circulators, Delta-P pumps never vary their speed - they work just like a single speed pump.
Which to choose?
If comfort delivery and efficiency are your goals than choosing the right circulator based on the system design can make all the difference. Delta-P circulators only adjust to changes in system pressure. Delta-T circulators measure the temperature difference between supply and return and infinitely vary their speed to deliver spot-on efficiency, compatibility, and comfort. Then add Zone Sentry Zone Valves and Taco Controls for the most efficient comfort system available anywhere. - Contributed by Chip Bidigare
CA great way to combat the value priced competition in the mini-split market is with the New Mitsubishi MSZ-HE Series Single Zone Product. Great for applications with hot spots including bedrooms, home offices, living rooms, dining rooms, basements, and kitchens. These systems are Inverter Driven and come with the same quality as a regular M-Series but without some of the features. Our packages include Indoor and Outdoor Units, Wireless Remote, and 15 Foot Line Set. Drain Pan heaters, Wall-mount Brackets or Pads are all recommend add ons to the sale. These units are in stock at the Warehouse. The "Value Series" Package target audience is those who are buying less expensive duct-less equipment elsewhere, not our Diamond Dealers.
Preparing for the New Water
Heater Efficiency Standards
The U.S. Department of
Energy (DOE), as a part of
the National Appliance
Energy Conservation Act
(NAECA), will require higher
Energy Factor (EF) ratings on
almost all residential gas,
electric, oil and tankless gas
water heaters starting on
April 16, 2015. As your partner,
Rheem is committed to helping our wholesalers and contractors maximize the positive impact of new energy-and cost-saving technologies. Wholesalers and contractors may continue to sell existing water heaters manufactured before April 16, 2015, until inventory is depleted. The products that will be most affected by the new NAECA standards are large capacity residential and standard gas and electric water heaters. Most standard water heaters will undergo some changes to meet the new minimum efficiency levels, such as added insulation. Rest assured, we are taking the necessary steps to ensure that our customers have access to a full spectrum of efficient water heaters. In fact, we have approximately 40 residential products in our current product portfolio that already comply with the new minimum standards. When it comes to meeting – and exceeding – NAECA 2015 standards, we’re ahead of the game. -Tom Wujcik Director Wholesale Sales / Rheem Water Heaters
The Outdoor Units have been lifted to the
roof-top. The David Whitney Building will be
the largest building in the USA using only
retrofit & Mitsubishi City-Multi VRF Product.
This is something YSC is proud to be
a part of. The building is 19 floors and
/was completed in 1915. Then again
renovated in 1959 and was home to
the Metro Times. The new remodel is
going to have an Aloft hotel and condos.
Another great downtown revitalization
project! Both today's photos and historic
Connectivity for All
Finally a Wi-Fi thermostat that you can offer to all of your customers!
- No "C" Wire Needed - so it will work with the existing wiring on most applications
NOTE: 2 wire systems, such as Heat only or Cool only, require a Common wire for connectivity
- Great value - so your customers won't have to take a loan to upgrade
- Market yourself - Register here so you can have your contact info and logo at your customer's fingertips See for yourself how easy Sensi is to install
See more at:
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