Which Tool Is Best for Installing Ventilation, Heat Recovery and Air Conditioning Systems?

Modern ventilation, heat recovery (HRV), air conditioning and other building technologies used in residential and commercial construction significantly improve comfort and living standards. However, their installation almost always requires drilling holes in concrete, brick or stone — often in a wide range of diameters.

This leads to one of the most frequently asked questions by installation companies and B2B contractors:

Is it better to use a carbide drill bit or a diamond core bit?

Carbide drill bits perform well for smaller diameters and simple installation work, while diamond core bits are the best choice for large openings, reinforced concrete, and applications where precision, speed and edge quality are critical.

Why Compare These Two Tools?

Today, installers mainly use two types of consumable tools:

• carbide drill bits (masonry bits, breakthrough bits),

• diamond core bits.

Industry fact:
The first diamond core bits were developed in the early 20th century for stone quarrying. Despite significant technological advancements, the operating principle of diamond segments has remained nearly unchanged for over 100 years. This is due to the exceptional properties of diamond — the hardest natural material on Earth.

As a result, diamond tools enable fast, stable and highly precise drilling, even in reinforced concrete, where conventional solutions lose efficiency.

Tool Design and Operating Principles – What Really Matters in Practice?

To select the right tool consciously, it is important to understand its construction. Every component — from the body to the cutting element — directly affects:

• drilling speed,

• hole edge quality,

• operator comfort and safety.

Carbide Drill Bits – Characteristics and Applications

Carbide drill bits are available in two basic versions:

1. Tubular (Core-Style) Carbide Bits

Construction:

• SDS Plus adapter,

• steel body,

• brazed carbide cutting edges.

Working range:

• diameters: 35–150 mm,

• drilling depth: approx. 70–75 mm.

2. Twist (Spiral) Carbide Drill Bits

Construction:

• steel body,

• SDS Plus or SDS Max shank,

• brazed carbide tip.

Working range:

• diameters: 20–55 mm,

• length: up to 1000 mm.

Typical Applications of Carbide Drill Bits

• wall plugs and light fixings – 6–12 mm,

• shelves, curtain rods, frames – 8–20 mm,

• electrical boxes – 68–72 mm,

• thin pipes and cables – 16–25 mm,

• brick, aerated concrete, lightweight concrete – 20–35 mm.

Limitations:
In hard and reinforced concrete, carbide drill bits wear out quickly and the quality of the hole deteriorates.

Diamond Core Bits – Construction and Technological Advantage

Diamond core bits always feature a tubular design and consist of two key components:

1. The Barrel (Body)

• steel tube with slots or holes for dust removal,

• connection: 16 mm (SDS Plus) or 1 1/4" UNC (diamond drilling rigs).

2. The Diamond Segment

• metal bond with synthetic diamonds,

• laser welded to the barrel,

• wears evenly, continuously exposing new sharp diamond particles.

The result is consistent drilling speed and perfectly smooth hole edges throughout the tool’s service life.

When Are Diamond Core Bits the Best Choice?

Diamond core bits are used when:

• large diameters are required,

• the material is hard or reinforced,

• aesthetics and precision matter.

Typical Applications

• ventilation and heat recovery systems – 60–202 mm,

• air conditioning – 60–150 mm,

• reinforced concrete, granite, marble – 32–202 mm,

• sanitary and installation risers – 50–150 mm,

• service penetrations in offices and industrial buildings – 60–180 mm.

Comparison: Carbide Drill Bit vs Diamond Core Bit

Conclusions for B2B Customers

Diamond core bits do not completely replace carbide drill bits — both solutions have their place in an installer’s workflow. The difference lies in scale, precision and time efficiency.

Why are more and more B2B companies choosing diamond core bits?

• faster project completion,

• consistent chip-free quality,

• reduced operator fatigue (no impact mode),

• lower cost per hole in high-volume drilling,

• greater predictability of project timelines.

Unlike carbide drill bits, which break the material apart, diamond core bits grind it precisely into fine dust. In practice, this difference determines quality, time efficiency and jobsite safety.

Summary

For companies installing ventilation, heat recovery and air conditioning systems, informed tool selection is a real operational advantage. The right tool:

• shortens project timelines,

• reduces complaints,

• improves service quality,

• increases team comfort and efficiency.

That is why technical knowledge and understanding the differences between carbide drill bits and diamond core bits have real business value in today’s B2B market.