OpenTherm is a non-manufacturer-dependent system of communication between modulating HVAC appliances and room thermostats. It consists of a communication protocol and an interface specification. The OpenTherm communication protocol is primarily designed to control modulating heating appliances. The protocol is available to members of the OpenTherm Association only.

Building owners and facility managers are quickly adapting to smart building trends that can both attract tenants and improve operational efficiency. Today, commercial buildings are more linked with connected devices than ever, from lightbulbs and thermostats to security alarms and elevators.

Optimum Energy’s patented software and engineering expertise has helped customers reduce energy use in heating and cooling systems, the largest consumer of energy in buildings, by up to 50%. Their solutions combine technologically advanced HVAC optimization software with powerful cloud-based data analytics and world-class engineering support.

OTS R&D provides research and development services with a focus on thermal and energy conversion systems. Much of the work centers around the HVAC&R and automotive industries. It provides consulting services, software development, educational workshops, and experimental assistance for a variety of customers and clients.

Established in 1982, P.W. Stephens is the premier provider for environmental remediation services in the greater state of California. P.W. Stephens is a fully licensed and certified abatement contractor specializing in the removal of asbestos, lead, mold and other biological contaminants in residential, commercial and multi-family building sectors.

Pace Heating and Air - Albany service all makes and models of furnaces and air conditioners. And they proudly offer the full line of Carrier heating and cooling equipment, as well as hearth products from HEAT-N-GLO.

Pacifica Home Services Ltd. provide a wide range of HVAC and home improvement services in the region of Houghton Le Spring, in Sunderland, in the United Kingdom.

Pack HVAC services has been customer's solution for heating and cooling issues in the Baton Rouge area for over 15 years! Their licensed and bonded team repairs, installs, and services all major brands of HVAC systems including heat pumps, furnaces, air conditioners, thermostats, air handlers, and high efficiency units.

Padi.io is a dynamic integration platform for IoT designed for Digital Twins. Padi integrates application user interfaces to create a single pane of glass. Padi integrates information across the Internet using the invented Connection Profile mechanism enabling integration using any/all protocols and semantics.

When it comes to heating & cooling for home or office, Palatine Unique Indoor Comfort provides expert HVAC installation & repair services in Palatine & nearby areas of the US state of Illinois.

Pamlico Air, Inc. is a family owned business. They have been in operation since 1990. From the first day in business, their goal has been to provide first rate service with top-quality products.

Parakeet provides enterprise solutions for multi-dwelling unit owners/managers to improve the resident experience and decrease expenses using their smart home automation technology. Their system allows for centralized remote access control of primary property functions like HVAC monitoring, door locks, garage doors, thermostat as well as freeze/flood sensors.

At Parasense, they provide food retail, military, nuclear and industrial sectors with innovative and cost effective refrigerant management, energy management, systems integration and performance management solutions.

Parts Town is an innovation-driven distributor of genuine OEM food service, residential appliance, and HVAC equipment repair parts. When there’s a hiccup with any piece of equipment, Parts Town is ready to jump in and help with the most in-stock parts on the planet, innovative technology, and an unmatched customer experience.

Paschal Heat, Air & Geothermal, the team of trained and certified HVAC technicians in Northwest provides timely, friendly support, and they guarantee 100% satisfaction from start to completion.

PHIUS (Passive House Institute US, Inc.) is an organization committed to making high-performance passive building the mainstream market standard. PHIUS+ buildings provide superior indoor air quality, resilience during power outages, and an extremely quiet, comfortable indoor environment.

PassiveLogic is disrupting the world of automation with the first fully autonomous platform for buildings. They reinvented automation to replace legacy control logic with real-time control decisions at the edge, reducing the world's carbon footprint, while paving the way for smart cities.

The world comes to Patterson for enhancing safety and comfort in HVAC and fire suppression technology, for meeting pumping demands in water supply, irrigation, flood prevention and wastewater treatment and for industrial solutions to liquid transfer and process heating or cooling needs.

Patterson-Kelley serves the commercial heating industry with the most respected products in the field. They provide Commercial Boilers, Commercial Water Heaters, Fabricated Systems, Commercial Solutions, Heating Solutions, Engineeering Solutions and much more.

Paul's Heating, Cooling, and Duct Cleaning and team of technical specialists are specialized in the installation and service of all major brands of quality heating and air conditioning equipment for both residential and light commercial use.

Payzer software product, Payzerware, is an end-to-end Field Service Management platform which helps contractors run their business, grow sales, and simplify back-office operations. Payzerware provides complete business management software including schedule / dispatch, invoicing, sales proposals, and maintenance agreements.

Pelion was originally founded as an incubation unit within Arm, the designer of key technologies at the heart of computing. With a unique combination of global IoT connectivity and device management from a single vendor, Pelion breaks down barriers to IoT adoption for anyone looking to transform their industry.

Perceptyx is the most comprehensive listening solution available to illuminate the employee experience and see the whole organization thrive.

Perdido Heating and Air Conditioning, the team of certified technicians make sure that the customers get the most out of what they spend from their pocket.

Perfect Cycle specializes in the purchase & sale of refrigerant gas, chiller recovery, reclamation, plus manufactures a complete line of recovery & reclaim processing machinery.

Perfect Temp Heating and Cooling is one of the best HVAC contractors in Minneapolis, MN, USA. At Perfect Temp, their commitment is to provide customers with the best possible service experience goes beyond just honoring a warranty or showing up when called upon.

Performance Aire manufactures VAV Thermal Diffusers, Air Terminal Units and Zone Control Solutions. Performance Aire has expanded its product line and they are now offering commercial VAV Air Terminal Units and the Fahrenheit™ Zone Control Series, a residential and commercial zoning system.

Perry HVAC is a full-service commercial air conditioning and heating company that's been taking care of customers big and small in the Dallas Fort Worth metroplex.

Peterman is a family-owned residential heating, cooling & plumbing company with offices in Indianapolis, Columbus, Muncie, Bloomington, and Lafayette, Indiana. It specializes in heating & cooling repair & installation, along with plumbing services, drains & sewers.

At Petri Plumbing & Heating, they are proud to live and work in Brooklyn! They’ve been here since 1906, offering fast, reliable, guaranteed Brooklyn plumbing service to all of the customers.