Churches and other places of worship require HVAC systems that increase comfort, energy efficiency and ensure quiet operation. Unfortunately, churches have large open spaces and unique architectural surroundings. This makes creating a comfortable indoor environment for such spaces more difficult. 

Nonetheless, you can still create the perfect MEP design for churches by determining the factors that make them unique. 

That’s what this article is all about. So, read on to find some of the most important factors you need to consider when upgrading or designing an HVAC system for a church. 

Factors that influence the HVAC Design for church 

Identifying the ideal mechanical design for the church raises certain issues not present with other HVAC system installations. And as mentioned earlier, it’s important to identify these factors first to determine how to meet their needs. Some of these factors are; 

  • Variable occupancy. A typical church layout features a central gathering space or a spacious sanctuary. Also, the design often includes high ceilings with a massive volume of empty space. 
  • Big glass. The architectural design of most churches features expansive glass windows. As you know, glass gains heat during the summer, and losses heat in winter to the outdoors. The sizing of the HVAC system should take this factor into consideration. 
  • Large spaces. Places of worship usually host large congregations once or twice every week in the central gathering space. But on other days, only study groups or smaller gatherings occupy ancillary meeting rooms. Besides, the facility is almost uncopied for several hours of the day during specific time frames. 

HVAC System Design Considerations for Churches 

Heating & Cooling options 

There are various types of HVAC systems you can consider installing in churches to create a comfortable environment. Some of these options include; 

  • Programmable thermostats. They maximize energy savings by allowing weekly and daily schedules. 
  • Mini-split systems. These systems allow for zone & room cooling. As a result, you can easily adjust the climate of certain areas and close off areas that are not in use. 
  • Radiant heating with water-heated tubing or electric heating coils. Radiant heating increases energy savings, improves air quality, and ensures quiet operation. 
  • Variable speed cooling and heating to avoid noisy on and off cycles. 
  • Ducted indoor air filters to ensure cleaner healthier air. 
  • Energy recovery HVAC system for improved ventilation and significant energy savings. 


There are several brands of HVAC systems for churches out there. Although off-brands sometimes get the job done, it’s always good to stick to a well-known brand. To determine the best brand of HVAC system to install in a church, do some research into the popular brands available. Alternatively, check consumer reports to see its opinion about various brands. You can check online reviews to see what people who have tried a specific brand have to say. 


Price is another important factor you need to consider when looking for the best HVAC system for the church. The church members and leaders will know the amount of money the church can afford to pay for the system. They can also choose to go into debt to buy a specific HVAC system. But if that isn’t an option, then they have to stick to an affordable system that will suit their budget. 


Like any other electric device, it’s important to choose a church HVAC system that comes with a warranty. Make sure that system has an extended warranty with the repair or replacement parts. In most cases, systems with a longer warranty are the best option since they demonstrate the reliability of the product. 

Customer Service 

Finally, think about the customer service of the company that manufactures the system you choose. Ensure that you choose a church HVAC system from a company that cares about its customers. The company should also be honest about its products and stand behind its items or services. More importantly, the firm should have fast customer support to assist you if you ever experience any issue with their HVAC system. In that regard, a firm that offers the best customer services should be accessible 24/7. 

HVAC Sizing Calculation for churches 

HVAC sizing calculations should be performed by a licensed and qualified Mechanical Design for church Engineer or contractor. There are certain allowances that should be considered in these calculations to ensure the MEP Engineering for the church has the right BTU capacity. 

For instance; 

  • If the large windows in the central gathering space receive direct sunlight, add 20%. 
  • If the church building frequently fills to max occupancy during church services, add 10% to the BTU capacity. 
  • However, if large windows can be opened or are shaded by trees, subtract 10% from the required BTU capacity.

HVAC system Design and Installations for Churches in California

Innodez Design & Engineering offers the best HVAC services for churches in California. Our professional HVAC engineers will work closely with your organization to come up with efficient heating & cooling solutions. Whether you have a small chapel or large sanctuary, we will ensure that your HVAC system is energy-efficient, quiet, and reliable. Also, we consider your church building’s architecture and aesthetics as well as the ventilation & air conditioning requirements for offices, activity rooms, and children’s centers. 

By choosing Innodez, rest assured that you’re working with licensed, certified, and experienced HVAC technicians. More importantly, we’ll ensure that you get the perfect HVAC system for your religious facility in California. 

Give us a call today! 

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