Predictika · Whole-home ventilation orders

An AI sales agent's MVHR ventilation order, checked before it goes out

An AI sales agent prepares an order for whole-home heat recovery ventilation: the unit, its first fix box, silencer and brackets, optional cooling, the valves for every room and the duct run. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the product line and returns a verdict, every reason and the figures it computed.

Scope: Nuaire MRXBOX MVHR orders (MRXBOX95AB-WM1, MRXBOXAB-ECO2B, ECO3B, ECO4, ECO5 and MRXBOX-LP2) with first fix boxes, silencers, brackets, switch, hybrid cooling and valves. See everything this validator covers

This validator models orders for Nuaire's MRXBOX heat recovery (MVHR) units sold for homes and apartments, not just the scenarios shown below.

  • Units and capacity — MRXBOX95AB-WM1 (kitchen plus two wet rooms), MRXBOXAB-ECO2B (kitchen plus up to five), ECO3B (up to six), ECO4 and ECO5 (up to seven) and the ceiling-void MRXBOX-LP2; the wet rooms in the dwelling are compared with what the unit serves; only the ECO4 and ECO5 have an integral humidistat.
  • Accessories — the MRXBOX-FF first fix box, MRXBOX-SIL silencer and MRXBOX-AV angled brackets come in sizes 2 to 5 and must match the unit; the summer/winter switch, the MRXBOX Hybrid Cooling System (MR-ECO-COOL-V) with a condensate route, an opposite-handed unit, Q-Aire valves for every room, and a five-year warranty*.
  • Site and total — ceiling void for the low profile unit, longest duct run, volume orders, and the total the quote states compared with the total the list prices give. Items marked with an asterisk (*) are illustrative: the five-year warranty and the condensate pump kit.

Any MRXBOX order that touches these rules is in scope — not only the scenarios pictured here. Not covered: Nuaire's other ranges (positive input ventilation, extract fans, commercial units), the duct range itself, controls and installation labor. Prices and several rules (accessory availability by unit, cooling pairing, void depth, duct run limits, volume threshold) are typical for this kind of product and are not published by Nuaire; all customers and orders are fictional.

The AI sales agentBuilds the ventilation order from the conversation and says it is ready.
Predictika validatorChecks every rule at once and returns the verdict, each finding, and the computed figures.

7 scenarios in 3 groups · each group runs from the agent’s first attempt to the outcome · click one to switch

What the agent proposes

The AI sales agent says

Illustrative agent statement. The validator receives the structured request below.

Proposing agent: AI sales agent (scripted)

Before sending, the agent must call Recorded run

Predictika validator


      

        
        
        
      

      
Waiting for the call.

      
    

  

  
  

    
Where rules-based CPQ gets it wrong
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Our assessment of what a typical rules-based CPQ (product rules, price rules and validation rules, as in Salesforce CPQ) does with the same cases. It is a judgment about effort and reliability, not a claim that nothing can be built.

    
What the validator caughtTypical rules-based CPQPredictika
Capacity that differs by unitOnly with care
A product rule per unit for the wet rooms it serves; every new unit or revised rating is another rule to maintain.		The unit and the rooms arrive in one request and the capacity is looked up and compared on every call.
Accessories whose size must match the unitOnly with workarounds
First fix box, silencer and brackets each carry a size that depends on the unit chosen on another line, so each needs its own cross-line rule.		Every item is in the request and each size is checked against the unit together.
Options that only some units acceptOnly with workarounds
Cooling needs a larger unit and a condensate route, and the humidistat exists on only some units; the conditions span lines and interact.		Unit, cooling, condensate route and humidistat need are checked together and every finding comes back in one answer.
Valves for every roomOnly with care
The count depends on the wet rooms and habitable rooms entered elsewhere; a rule can compare them but must be written and kept in step.		The needed count is computed from the rooms and compared with the valves on the quote.
Stated total that must match the list pricesOnly with care
A stated figure is a free-entry field; a rule can compare it with the computed total, but someone has to write and maintain it across options and quantities.		The stated total travels with the order and is compared with the computed total on every call.

  

  

    
What this validator catches: findings from its test cases
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Every rule is checked on every call, in any order the choices arrive; one problem never hides another. Blocking findings stop the quote; approval findings need a person to sign off; everything else is computed.

    
1The dwelling has a kitchen and 3 wet rooms; the unit selected ventilates a kitchen and up to 2.
2The dwelling has a kitchen and 6 wet rooms; the unit selected ventilates a kitchen and up to 5.
3The dwelling has a kitchen and 7 wet rooms; the unit selected ventilates a kitchen and up to 6.
4The dwelling has a kitchen and 8 wet rooms; the unit selected ventilates a kitchen and up to 7.
5The dwelling has a kitchen and 5 wet rooms; the unit selected ventilates a kitchen and up to 4.
6The dwelling needs 7 valves (kitchen, wet rooms and habitable rooms); the quote has 6.
7The first fix box is size 4; the unit selected takes size 3.
8The silencer is size 2; the unit selected takes size 3.
9The angled mounting brackets are size 5; the unit selected takes size 3.
10First fix boxes, silencers and angled brackets are quoted for the ECO2B, ECO3B, ECO4 and ECO5 sizes; this model has none for the unit selected.
11The customer needs an integral humidistat; only the ECO4 and ECO5 units have one.
12The hybrid cooling system is quoted with the ECO4 and ECO5 units only; the unit selected is not one of them.
13The hybrid cooling system produces condensate and the quote has neither a condensate pump nor a gravity drain.
14The low profile unit needs a ceiling void of at least 300 mm; the building has 299 mm.
15The longest duct run is 13 m; runs over 12 m need a person to check the fan duty.
16The longest duct run is 15 m; runs over 12 m need a person to check the fan duty.
17The longest duct run is 16 m; this model allows at most 15 m to any room.
18The quote states a total of 1,000 pounds; the list prices give 1,101 pounds.
19The quote asks for an opposite-handed unit; a person should confirm availability and lead time.
20The quote is for 50 dwellings; a person should confirm volume pricing and delivery phasing.

  

  

    
Scenarios and results
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The recorded result of the validator for each scenario on this page: the request the AI agent sent, the verdict, and every finding, in the order they appear above.

    
1. Apartment block with cooling: A cooled apartment order with too few valves, a mismatched first fix box and no condensate route

    
The agent's request. Please quote 12 x Nuaire MRXBOXAB-ECO3B for dwellings with a kitchen and 3 wet rooms and 3 other habitable rooms, with 5 valves per dwelling, each with an MRXBOX-FF2 first fix box, an MRXBOX-SIL3 silencer, a summer/winter switch and the MRXBOX Hybrid Cooling System. The longest duct run is 8 m. The quote states a total of 45,816 pounds. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Too few valves for the rooms. The dwelling needs 7 valves (kitchen, wet rooms and habitable rooms); the quote has 5.
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  • First fix box size does not match. The first fix box is size 2; the unit selected takes size 3.
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  • Cooling needs a larger unit. The hybrid cooling system is quoted with the ECO4 and ECO5 units only; the unit selected is not one of them.
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  • Cooling needs a condensate route. The hybrid cooling system produces condensate and the quote has neither a condensate pump nor a gravity drain.
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2. Apartment block with cooling: The agent resubmits after fixing the errors

    
The agent's request. Please quote 12 x Nuaire MRXBOXAB-ECO4 for dwellings with a kitchen and 3 wet rooms and 3 other habitable rooms, with 7 valves per dwelling, each with an MRXBOX-FF4 first fix box, an MRXBOX-SIL4 silencer, a summer/winter switch and the MRXBOX Hybrid Cooling System with a condensate pump. The longest duct run is 8 m. The quote states a total of 48,708 pounds. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 12 dwelling(s), 3,933 pounds per dwelling for the unit and options, 7 valves each; total 48,708 pounds at list prices.
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3. Large family house: A six-wet-room house order that needs a humidistat

    
The agent's request. Please quote 6 x Nuaire MRXBOXAB-ECO2B for dwellings with a kitchen and 6 wet rooms and 5 other habitable rooms, with 12 valves per dwelling. The longest duct run is 8 m. The customer needs an integral humidistat. The quote states a total of 6,666 pounds. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • More wet rooms than the unit serves. The dwelling has a kitchen and 6 wet rooms; the unit selected ventilates a kitchen and up to 5.
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  • Humidistat needed but not built in. The customer needs an integral humidistat; only the ECO4 and ECO5 units have one.
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4. Large family house: The agent resubmits after fixing the errors

    
The agent's request. Please quote 6 x Nuaire MRXBOXAB-ECO3B for dwellings with a kitchen and 6 wet rooms and 5 other habitable rooms, with 12 valves per dwelling. The longest duct run is 8 m. The customer needs an integral humidistat. The quote states a total of 7,146 pounds. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Humidistat needed but not built in. The customer needs an integral humidistat; only the ECO4 and ECO5 units have one.
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5. Large family house: The agent resubmits after fixing the errors

    
The agent's request. Please quote 6 x Nuaire MRXBOXAB-ECO4 for dwellings with a kitchen and 6 wet rooms and 5 other habitable rooms, with 12 valves per dwelling. The longest duct run is 8 m. The customer needs an integral humidistat. The quote states a total of 7,866 pounds. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. 6 dwelling(s), 1,095 pounds per dwelling for the unit and options, 12 valves each; total 7,866 pounds at list prices.
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6. Flats with low profile units: A low profile order with a shallow void, a long duct run and accessories

    
The agent's request. Please quote 8 x Nuaire MRXBOX-LP2 for dwellings with a kitchen and 2 wet rooms and 2 other habitable rooms, with 5 valves per dwelling, each with an MRXBOX-FF3 first fix box. The longest duct run is 18 m and the ceiling void is 250 mm. The quote states a total of 7,000 pounds. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Accessory not offered for this unit. First fix boxes, silencers and angled brackets are quoted for the ECO2B, ECO3B, ECO4 and ECO5 sizes; this model has none for the unit selected.
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  • Ceiling void too shallow. The low profile unit needs a ceiling void of at least 300 mm; the building has 250 mm.
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  • Duct run too long. The longest duct run is 18 m; this model allows at most 15 m to any room.
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  • Stated total does not match. The quote states a total of 7,000 pounds; the list prices give 10,240 pounds.
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7. Flats with low profile units: The agent resubmits after fixing the errors

    
The agent's request. Please quote 8 x Nuaire MRXBOX-LP2 for dwellings with a kitchen and 2 wet rooms and 2 other habitable rooms, with 5 valves per dwelling, each with an opposite-handed unit. The longest duct run is 10 m and the ceiling void is 320 mm. The quote states a total of 9,080 pounds. It is ready to send.

    
Verdict: Needs approval.

    
    
      
  • Opposite-handed unit to confirm. The quote asks for an opposite-handed unit; a person should confirm availability and lead time.
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  • Order summary. 8 dwelling(s), 1,045 pounds per dwelling for the unit and options, 5 valves each; total 9,080 pounds at list prices.
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Narration transcript
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The text of the narrated walkthrough, step by step.

    
    
      
  1. Welcome to a demo of Predictika's Validator. An AI sales agent prepares an order for whole-home heat recovery ventilation: the unit, its first fix box, silencer and brackets, and more. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the product line and returns a verdict, every reason and the figures it computed.
    2. 
      
  2. I will start with the first request by the agent.
    3. 
      
  3. The agent says. Please quote 12 x Nuaire MRXBOXAB-ECO3B for dwellings. The longest duct run is 8 m. The rest of the request is on screen. The quote states a total of 45,816 pounds.
    4. 
      
  4. Before it goes out, the agent calls the validator.
    5. 
      
  5. Blocked, with four findings, all in one answer. The dwelling needs 7 valves (kitchen, wet rooms and habitable rooms); the quote has 5. The first fix box is size 2; the unit selected takes size 3. The hybrid cooling system is quoted with the ECO4 and ECO5 units only; the unit selected is not one of them. The other one is on screen.
    6. 
      
  6. The validator returned four blocking findings in one answer. A check that reads one field at a time would pass most of this; it shows only when the choices in the quote are checked against each other.
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  7. What this shows: for accessories whose size must match the unit, a rules-based CPQ can do this only with workarounds.
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  8. Now the agent resubmits.
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  9. The corrected request. It changes the unit to MRXBOXAB-ECO4, the valves on the quote to 7 per dwelling, the first fix box size to 4, the silencer size to 4, the condensate pump to yes and the stated total to 48,708 pounds.
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  10. It calls the validator again.
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  11. This time the validator clears it.
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  12. The validator also returns the line-item quote. It starts with Nuaire MRXBOXAB-ECO4 MVHR unit and MRXBOX-FF4 first fix box; the other five lines are on screen.
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  13. All four earlier findings are cleared, and the validator's total, 48,708 pounds, matches the quote.
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  14. Four problems caught in one call, fixed in one pass, and a clean quote. That is the value of Predictika's validator: catching mistakes before they reach the customer. Now you can try the other scenarios yourself.
    15.