ᐅ Looking for Manufacturer of Heating / Mechanical Ventilation with Heat Recovery System

Hello,

I am currently planning our single-family home... The electrical system and automation are mostly settled... (about 170m² (1830 ft²) without basement plus a large garage). Now I want to focus on heating and controlled residential ventilation.

Since KNX will play a major role in our house, I would like to control the ventilation system using appropriate sensors. The heating system will not be integrated because I believe it can manage fine on its own :P

The plan is to install an air source heat pump (does solar support make sense here?!) and a controlled residential ventilation system with heat recovery. I have not yet spoken to any heating contractors as it seems everyone prefers to promote their own “house brand.”

Which manufacturers offer the best price/performance ratio for these two areas?

Thanks

Do you want to control the mechanical ventilation with heat recovery directly via the bus system? There aren’t many options available, and the gateways with the built-in functions tend to be limited and expensive.

It’s easier to control the mechanical ventilation with traditional KNX components: 0-10 V and 230 V actuators, a couple of temperature sensors, and whatever else you might need.

This way, you’re not restricted to a specific manufacturer and can essentially install any system.

I'm not completely resistant to advice...

Temperature sensors are already integrated into the switches anyway... I'm also considering adding humidity sensors and CO2 sensors in some rooms...

What about the manufacturers? Which devices would you recommend?

Well, the interior looks about 90% the same. I would choose any manufacturer with an enthalpy exchanger that does not require special filters.

Zehnder has always been highly regarded. Then there are also Wolf/Brink and Helios/Vallox.

For the heat pump, it is important first that it is properly sized according to the heating load of the house, that no buffer tank is installed, and that the heating surfaces inside the house are very well planned. The heat pump should ideally be modulating. You can find many suggestions on this topic online. The manufacturer is initially secondary. There is a list somewhere at the Bafa that compares devices by efficiency, which can help to make a reliable choice.

You want an air-to-water heat pump, not an air-to-air heat pump. Solar thermal systems do not make sense—in fact, they are counterproductive. Photovoltaics are sensible and economical.

Slightly oversize the heat pump and the mechanical ventilation with heat recovery system.

Seb_Opf schrieb:

Temperature sensors are already integrated in the switches... I’m also considering humidity and CO2 sensors in some rooms...

The ventilation system cannot be controlled individually by room anyway. Room-specific humidity values are of little relevance for this trade. You only need one central CO2 sensor in the exhaust air to make use of the information.

Ultimately, in a controlled ventilation system, the important factors are the air volume flow and the bypass control. There isn’t much else to manage. You can take a look at the Zehnder KNX gateway manual to get an idea.

The heat pump follows the same logic. There isn’t much to control because of the system’s inertia.